@article {Array,
title = {1. A highly efficient polymer non-fullerene organic solar cell enhanced by introducing a small molecule as a crystallizing-agent},
journal = {Materials Today},
volume = {21},
year = {2018},
month = {Jan-01-2018},
pages = {79 - 87},
issn = {13697021},
doi = {10.1016/j.mattod.2017.10.003},
url = {http://linkinghub.elsevier.com/retrieve/pii/S1369702117304935http://api.elsevier.com/content/article/PII:S1369702117304935?httpAccept=text/xmlhttp://api.elsevier.com/content/article/PII:S1369702117304935?httpAccept=text/plain},
author = {Zheng, Yifan and Huang, Jiang and Wang, Gang and Kong, Jaemin and Huang, Di and Mohadjer Beromi, Megan and Hazari, Nilay and Taylor, Andr{\'e} D. and Yu, Junsheng}
}
@article {Array,
title = {2. Three-Phase Morphology Evolution in Sequentially Solution-Processed Polymer Photodetector: Toward Low Dark Current and High Photodetectivity},
journal = {ACS Applied Materials \& Interfaces},
volume = {10},
year = {2018},
month = {Jul-01-2020},
pages = {3856 - 3864},
issn = {1944-8244},
doi = {10.1021/acsami.7b15730},
url = {http://pubs.acs.org/doi/10.1021/acsami.7b15730http://pubs.acs.org/doi/pdf/10.1021/acsami.7b15730},
author = {Wang, Hanyu and Xing, Shen and Zheng, Yifan and Kong, Jaemin and Yu, Junsheng and Taylor, Andr{\'e} D.}
}
@article {Array,
title = {3. Binary Solvent Additives Treatment Boosts the Efficiency of PTB7:PCBM Polymer Solar Cells to Over 9.5\%},
journal = {Solar RRL},
volume = {2},
year = {2018},
month = {Jan-04-2018},
pages = {1700144},
doi = {10.1002/solr.v2.410.1002/solr.201700144},
url = {http://doi.wiley.com/10.1002/solr.v2.4http://doi.wiley.com/10.1002/solr.201700144http://onlinelibrary.wiley.com/wol1/doi/10.1002/solr.201700144/fullpdfhttps://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002\%2Fsolr.201700144},
author = {Zheng, Yifan and Wang, Gang and Huang, Di and Kong, Jaemin and Goh, Tenghooi and Huang, Wei and Yu, Junsheng and Taylor, Andr{\'e} D.}
}
@article {Array,
title = {4. Spray coating of the PCBM electron transport layer significantly improves the efficiency of p-i-n planar perovskite solar cells},
journal = {Nanoscale},
year = {2018},
month = {Jan-01-2018},
issn = {2040-3364},
doi = {10.1039/C8NR01763H},
url = {http://xlink.rsc.org/?DOI=C8NR01763Hhttp://pubs.rsc.org/en/content/articlepdf/2018/NR/C8NR01763Hhttp://pubs.rsc.org/en/content/articlepdf/2018/NR/C8NR01763H},
author = {Zheng, Yifan and Kong, Jaemin and Huang, Di and Shi, Wei and McMillon-Brown, Lyndsey and Katz, Howard E. and Yu, Junsheng and Taylor, Andr{\'e} D.}
}
@article {Array,
title = {5. PEOz-PEDOT:PSS Composite Layer: A Route to Suppressed Hysteresis and Enhanced Open-Circuit Voltage in Planar Perovskite Solar Cell},
journal = {ACS Applied Materials \& Interfaces},
year = {2018},
month = {Jan-06-2020},
issn = {1944-8244},
doi = {10.1021/acsami.8b05949},
url = {http://pubs.acs.org/doi/10.1021/acsami.8b05949http://pubs.acs.org/doi/pdf/10.1021/acsami.8b05949},
author = {Huang, Di and Goh, Tenghooi and McMillon-Brown, Lyndsey and Kong, Jaemin and Zheng, Yifan and Zhao, Jiao and Li, Yang and Zhao, Suling and Xu, Zheng and Taylor, Andr{\'e} D.}
}
@article {Array,
title = {1. Combinatorial screening of Pd-based quaternary electrocatalysts for oxygen reduction reaction in alkaline media},
journal = {J. Mater. Chem. A},
year = {2017},
month = {Jan-01-2017},
chapter = {67},
issn = {2050-7488},
doi = {10.1039/C6TA08088J},
url = {http://xlink.rsc.org/?DOI=C6TA08088J},
author = {Li, Jinyang and Stein, Helge S. and Sliozberg, Kirill and Liu, Jingbei and Liu, Yanhui and Sertic, Genevieve and Scanley, Ellen and Ludwig, Alfred and Schroers, Jan and Schuhmann, Wolfgang and Taylor, Andr{\'e} D.}
}
@article {Array,
title = {2. Perovskite solar cells with a DMSO-treated PEDOT:PSS hole transport layer exhibit higher photovoltaic performance and enhanced durability},
journal = {Nanoscale},
volume = {9},
year = {2017},
month = {Jan-01-2017},
pages = {4236 - 4243},
issn = {2040-3364},
doi = {10.1039/C6NR08375G},
url = {http://xlink.rsc.org/?DOI=C6NR08375Ghttp://pubs.rsc.org/en/content/articlepdf/2017/NR/C6NR08375G},
author = {Huang, Di and Goh, Tenghooi and Kong, Jaemin and Zheng, Yifan and Zhao, Suling and Xu, Zheng and Taylor, Andr{\'e} D.}
}
@article {Array,
title = {3. Colorful polymer solar cells employing an energy transfer dye molecule},
journal = {Nano Energy},
volume = {38},
year = {2017},
month = {Jan-08-2017},
pages = {36 - 42},
issn = {22112855},
doi = {10.1016/j.nanoen.2017.05.032},
url = {http://linkinghub.elsevier.com/retrieve/pii/S221128551730304Xhttp://api.elsevier.com/content/article/PII:S221128551730304X?httpAccept=text/xmlhttp://api.elsevier.com/content/article/PII:S221128551730304X?httpAccept=text/plain},
author = {Kong, Jaemin and Mohadjer Beromi, Megan and Mariano, Marina and Goh, Tenghooi and Antonio, Francisco and Hazari, Nilay and Taylor, Andr{\'e} D.}
}
@article {Array,
title = {4. Exploring a wider range of Mg-Ca-Zn metallic glass as biocompatible alloys using combinatorial sputtering},
journal = {Chem. Commun.},
year = {2017},
month = {Jan-01-2017},
issn = {1359-7345},
doi = {10.1039/C7CC02733H},
url = {http://xlink.rsc.org/?DOI=C7CC02733Hhttp://pubs.rsc.org/en/content/articlepdf/2017/CC/C7CC02733H},
author = {Li, Jinyang and Gittleson, Forrest S. and Liu, Yanhui and Liu, Jingbei and Loye, Ayomiposi M. and McMillon-Brown, Lyndsey and Kyriakides, Themis R. and Schroers, Jan and Taylor, Andr{\'e} D.}
}
@article {Array,
title = {5. Increased mobility and on/off ratio in organic field-effect transistors using low-cost guanine-pentacene multilayers},
journal = {Applied Physics Letters},
volume = {111},
year = {2017},
month = {Dec-07-2018},
pages = {043301},
issn = {0003-6951},
doi = {10.1063/1.4995251},
url = {http://aip.scitation.org/doi/10.1063/1.4995251http://aip.scitation.org/doi/pdf/10.1063/1.4995251},
author = {Shi, Wei and Zheng, Yifan and Taylor, Andr{\'e} D. and Yu, Junsheng and Katz, Howard E.}
}
@article {Array,
title = {6. A Cytop Insulating Tunneling Layer for Efficient Perovskite Solar Cells},
journal = {Small Methods},
volume = {1},
year = {2017},
month = {Jan-10-2017},
pages = {1700244},
doi = {10.1002/smtd.201700244},
author = {Zheng, Yifan and Shi, Wei and Kong, Jaemin and Huang, Di and Katz, Howard E. and Yu, Junsheng and Taylor, Andr{\'e} D.}
}
@article {Array,
title = {7. Charge Transfer from Carbon Nanotubes to Silicon in Flexible Carbon Nanotube/Silicon Solar Cells},
journal = {Small},
volume = {13},
year = {2017},
month = {Jan-12-2017},
pages = {1702387},
doi = {10.1002/smll.v13.4810.1002/smll.201702387},
author = {Li, Xiaokai and Mariano, Marina and McMillon-Brown, Lyndsey and Huang, Jing-Shun and Sfeir, Matthew Y. and Reed, Mark A. and Jung, Yeonwoong and Taylor, Andr{\'e} D.}
}
@article {Array,
title = {8. Structurally Deformed MoS for Electrochemically Stable, Thermally Resistant, and Highly Efficient Hydrogen Evolution Reaction},
journal = {Advanced Materials},
volume = {29},
year = {2017},
month = {Jan-11-2017},
pages = {1703863},
doi = {10.1002/adma.201703863},
url = {https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002\%2Fadma.201703863},
author = {Chen, Yen-Chang and Lu, Ang-Yu and Lu, Ping and Yang, Xiulin and Jiang, Chang-Ming and Mariano, Marina and Kaehr, Bryan and Lin, Oliver and Taylor, Andre and Sharp, Ian D. and Li, Lain-Jong and Chou, Stanley S. and Tung, Vincent}
}
@article {Array,
title = {9. Light-trapping in polymer solar cells by processing with nanostructured diatomaceous earth},
journal = {Organic Electronics},
volume = {51},
year = {2017},
month = {Jan-12-2017},
pages = {422 - 427},
issn = {15661199},
doi = {10.1016/j.orgel.2017.09.009},
url = {http://linkinghub.elsevier.com/retrieve/pii/S1566119917304470http://api.elsevier.com/content/article/PII:S1566119917304470?httpAccept=text/xmlhttp://api.elsevier.com/content/article/PII:S1566119917304470?httpAccept=text/plain},
author = {McMillon-Brown, Lyndsey and Mariano, Marina and Lin, YunHui L. and Li, Jinyang and Hashmi, Sara M. and Semichaevsky, Andrey and Rand, Barry P. and Taylor, Andr{\'e} D.}
}
@article {Array,
title = {B 10. An additive dripping technique using diphenyl ether fortuning perovskite crystallization for high-efficiency solar cells},
journal = {Nano Research},
year = {2017},
month = {Aug-12-2018},
issn = {1998-0124},
doi = {10.1007/s12274-017-1894-7},
url = {http://link.springer.com/10.1007/s12274-017-1894-7http://link.springer.com/content/pdf/10.1007/s12274-017-1894-7.pdfhttp://link.springer.com/content/pdf/10.1007/s12274-017-1894-7.pdfhttp://link.springer.com/article/10.1007/s12274-017-1894-7/fulltext.html},
author = {Huang, Di and Goh, Tenghooi and Zheng, Yifan and Qin, Zilun and Zhao, Jiao and Zhao, Suling and Xu, Zheng and Taylor, Andr{\'e} D.}
}
@article {Array,
title = {B 11. Nanopatterned Bulk Metallic Glass Biosensors},
journal = {ACS Sensors},
volume = {2},
year = {2017},
month = {Oct-12-2018},
pages = {1779 - 1787},
issn = {2379-3694},
doi = {10.1021/acssensors.7b00455},
url = {http://pubs.acs.org/doi/10.1021/acssensors.7b00455http://pubs.acs.org/doi/pdf/10.1021/acssensors.7b00455},
author = {Kinser, Emily R. and Padmanabhan, Jagannath and Yu, Roy and Corona, Sydney L. and Li, Jinyang and Vaddiraju, Sagar and Legassey, Allen and Loye, Ayomiposi and Balestrini, Jenna and Solly, Dawson A. and Schroers, Jan and Taylor, Andr{\'e} D. and Papadimitrakopoulos, Fotios and Herzog, Raimund I. and Kyriakides, Themis R.}
}
@article {Array,
title = {B 12. Stable Graphene-Two-Dimensional Multiphase Perovskite Heterostructure Phototransistors with High Gain},
journal = {Nano Letters},
volume = {17},
year = {2017},
month = {Jan-12-2018},
pages = {7330 - 7338},
issn = {1530-6984},
doi = {10.1021/acs.nanolett.7b02980},
url = {http://pubs.acs.org/doi/10.1021/acs.nanolett.7b02980http://pubs.acs.org/doi/pdf/10.1021/acs.nanolett.7b02980},
author = {Shao, Yuchuan and Liu, Ye and Chen, Xiaolong and Chen, Chen and Sarpkaya, Ibrahim and Chen, Zhaolai and Fang, Yanjun and Kong, Jaemin and Watanabe, Kenji and Taniguchi, Takashi and Taylor, Andre and Huang, Jinsong and Xia, Fengnian}
}
@article {Array,
title = {1. Heme biomolecule as redox mediator and oxygen shuttle for efficient charging of lithium-oxygen batteries},
journal = {Nature Communications},
volume = {7},
year = {2016},
month = {Jul-10-2017},
pages = {12925},
doi = {10.1038/ncomms12925},
url = {http://www.nature.com/doifinder/10.1038/ncomms12925},
author = {Ryu, Won-Hee and Gittleson, Forrest S. and Thomsen, Julianne M. and Li, Jinyang and Schwab, Mark J. and Brudvig, Gary W. and Taylor, Andr{\'e} D.}
}
@article {Array,
title = {2. Mobility enhancement of organic field-effect transistor based on guanine trap-neutralizing layer},
journal = {Applied Physics Letters},
volume = {109},
year = {2016},
month = {Mar-10-2016},
pages = {143301},
issn = {0003-6951},
doi = {10.1063/1.4963882},
url = {http://scitation.aip.org/content/aip/journal/apl/109/14/10.1063/1.4963882},
author = {Shi, Wei and Zheng, Yifan and Yu, Junsheng and Taylor, Andr{\'e} D. and Katz, Howard E.}
}
@article {Array,
title = {3. Solution-processed Titanium Carbide MXene films examined as highly transparent conductors},
journal = {Nanoscale},
year = {2016},
month = {08/2016},
issn = {2040-3364},
doi = {10.1039/C6NR03682A},
url = {http://pubs.rsc.org/en/Content/ArticleLanding/2016/NR/C6NR03682A},
author = {Mariano, Marina and Mashtalir, O. and Antonio, Francisco and Ryu, Won-Hee and Deng, Bingchen and Xia, Fengnian and Gogotsi, Yury and Taylor, Andre}
}
@article {Array,
title = {4. A New Design Strategy for Observing Lithium Oxide Growth-Evolution Interactions Using Geometric Catalyst Positioning},
journal = {Nano Letters},
year = {2016},
month = {May-07-2016},
issn = {1530-6984},
doi = {10.1021/acs.nanolett.6b00856},
url = {http://pubs.acs.org/doi/abs/10.1021/acs.nanolett.6b00856},
author = {Ryu, Won-Hee and Gittleson, Forrest S. and Li, Jinyang and Tong, Xiao and Taylor, {\'e} D.}
}
@article {Array,
title = {5. Quaternary Organic Solar Cells Enhanced by Cocrystalline Squaraines with Power Conversion Efficiencies >10\%},
journal = {Advanced Energy Materials},
year = {2016},
month = {Aug-05-2016},
pages = {1600660},
doi = {10.1002/aenm.201600660},
url = {http://doi.wiley.com/10.1002/aenm.201600660http://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002\%2Faenm.201600660},
author = {Goh, Tenghooi and Huang, Jing-Shun and Yager, Kevin G. and Sfeir, Matthew Y. and Nam, Chang-Yong and Tong, Xiao and Guard, Louise M. and Melvin, Patrick R. and Antonio, Francisco and Bartolome, Benjamin G. and Lee, Minjoo L. and Hazari, Nilay and Taylor, A D..}
}
@article {Array,
title = {6. Toward Efficient Thick Active PTB7 Photovoltaic Layers Using Diphenyl Ether as a Solvent Additive},
journal = {ACS Applied Materials \& Interfaces},
volume = {8},
year = {2016},
month = {Oct-06-2017},
pages = {15724 - 15731},
issn = {1944-8244},
doi = {10.1021/acsami.6b03453},
url = {http://pubs.acs.org/doi/abs/10.1021/acsami.6b03453},
author = {Zheng, Yifan and Goh, Tenghooi and Fan, Pu and Shi, Wei and Yu, Junsheng and Taylor, A. D.}
}
@article {Array,
title = {7. Development of Omniphobic Desalination Membranes Using a Charged Electrospun Nanofiber Scaffold},
journal = {ACS Applied Materials \& Interfaces},
volume = {8},
year = {2016},
month = {Apr-05-2016},
pages = {11154 - 11161},
issn = {1944-8244},
doi = {10.1021/acsami.6b02419},
url = {http://pubs.acs.org/doi/abs/10.1021/acsami.6b02419},
author = {Lee, Jongho and Boo, Chanhee and Ryu, Won-Hee and Taylor, A. D. and Elimelech, Menachem}
}
@article {Array,
title = {8. Pt and Pd catalyzed oxidation of Li 2 O 2 and DMSO during Li{\textendash}O 2 battery charging},
journal = {Chem. Commun.},
volume = {52},
year = {2016},
month = {Jan-01-2016},
pages = {6605 - 6608},
issn = {1359-7345},
doi = {10.1039/C6CC01778A},
url = {http://xlink.rsc.org/?DOI=C6CC01778A},
author = {Gittleson, Forrest S. and Ryu, Won-Hee and Schwab, Mark and Tong, Xiao and Taylor, A. D.}
}
@article {Array,
title = {9. Toward Microcapsule-Embedded Self-Healing Membranes},
journal = {Environmental Science \& Technology Letters},
year = {2016},
month = {Jul-03-2016},
issn = {2328-8930},
doi = {10.1021/acs.estlett.6b00046},
url = {http://pubs.acs.org/doi/abs/10.1021/acs.estlett.6b00046},
author = {Kim, Sang-Ryoung and Getachew, Bezawit A. and Park, Seon-Joo and Kwon, Oh-Seok and Ryu, Won-Hee and Taylor, {\'e} D. and Bae, Joonwon and Kim, Jae-Hong}
}
@article {Array,
title = {B1. Heterogeneous WS x /WO 3 Thorn-Bush Nanofiber Electrodes for Sodium-Ion Batteries},
journal = {ACS Nano},
year = {2016},
month = {Mar-02-2017},
issn = {1936-0851},
doi = {10.1021/acsnano.5b06538},
url = {http://pubs.acs.org/doi/abs/10.1021/acsnano.5b06538},
author = {Ryu, Won-Hee and Wilson, Hope and Sohn, Sungwoo and Li, Jinyang and Tong, Xiao and Shaulsky, Evyatar and Schroers, Jan and Elimelech, Menachem and Taylor, A. D.}
}
@article {Array,
title = {B2. Electrocatalysts: Guided Evolution of Bulk Metallic Glass Nanostructures: A Platform for Designing 3D Electrocatalytic Surfaces (Adv. Mater. 10/2016)},
journal = {Advanced Materials},
volume = {28},
year = {2016},
month = {Jan-03-2016},
pages = {1902 - 1902},
doi = {10.1002/adma.201504504},
url = {http://doi.wiley.com/10.1002/adma.v28.10http://doi.wiley.com/10.1002/adma.201670064http://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002\%2Fadma.201670064},
author = {Doubek, Gustavo and Sekol, Ryan C. and Li, Jinyang and Ryu, Won-Hee and Gittleson, Forrest S. and Nejati, Siamak and Moy, Eric and Reid, Candy and Carmo, Marcelo and Linardi, Marcelo and Bordeenithikasem, Punnathat and Kinser, Emily and Liu, Yanhui and Tong, Xiao and Osuji, Chinedum O. and Schroers, Jan and Mukherjee, Sundeep and Taylor, {\'e} D.}
}
@article {66,
title = {Coevaporated Bisquaraine Inverted Solar Cells: Enhancement Due to Energy Transfer and Open Circuit Voltage Control},
journal = {ACS PhotonicsACS Photonics},
volume = {2},
number = {1},
year = {2015},
pages = {86-95},
isbn = {2330-4022
2330-4022},
doi = {10.1021/ph500282z},
author = {Goh, Tenghooi and Huang, Jing-Shun and Bielinski, Elizabeth A. and Thompson, Bennett A. and Tomasulo, Stephanie and Lee, Minjoo L. and Sfeir, Matthew Y. and Hazari, Nilay and Taylor, Andr{\'e} D.}
}
@article {88,
title = {Enhanced photoelectrochemical and sensing performance of novel TiO2 arrays to H2O2 detection},
journal = {Chemical Sensors and Actuators B},
volume = {211},
year = {2015},
pages = {111-115},
isbn = {09254005},
doi = {10.1016/j.snb.2015.01.060},
author = {Yu, Lianqing and Zhang, Yaping and Zhi, Qianqian and Wang, Qingqing and Gittleson, Forrest S. and Li, Jinyang and Taylor, Andr{\'e} D.}
}
@article {78,
title = {A high power density miniaturized microbial fuel cell having carbon nanotube anodes},
journal = {Journal of Power Sources},
volume = {273},
year = {2015},
pages = {823-830},
isbn = {03787753},
doi = {10.1016/j.jpowsour.2014.09.165},
author = {Ren, Hao and Pyo, Soonjae and Lee, Jae-Ik and Park, Tae-Jin and Gittleson, Forrest S. and Leung, Frederick C. C. and Kim, Jongbaeg and Taylor, Andr{\'e} D. and Lee, Hyung-Sool and Chae, Junseok}
}
@article {79,
title = {A mesoporous catalytic membrane architecture for lithium-oxygen battery systems},
journal = {Nano LettNano Lett},
volume = {15},
number = {1},
year = {2015},
note = {Ryu, Won-Hee
Gittleson, Forrest S
Schwab, Mark
Goh, Tenghooi
Taylor, Andre D
eng
Research Support, Non-U.S. Gov{\textquoteright}t
Research Support, U.S. Gov{\textquoteright}t, Non-P.H.S.
2014/12/30 06:00
Nano Lett. 2015 Jan 14;15(1):434-41. doi: 10.1021/nl503760n. Epub 2014 Dec 30.},
month = {Jan 14},
pages = {434-41},
abstract = {
Controlling the mesoscale geometric configuration of catalysts on the oxygen electrode is an effective strategy to achieve high reversibility and efficiency in Li-O2 batteries. Here we introduce a new Li-O2 cell architecture that employs a catalytic polymer-based membrane between the oxygen electrode and the separator. The catalytic membrane was prepared by immobilization of Pd nanoparticles on a polyacrylonitrile (PAN) nanofiber membrane and is adjacent to a carbon nanotube electrode loaded with Ru nanoparticles. During oxide product formation, the insulating PAN polymer scaffold restricts direct electron transfer to the Pd catalyst particles and prevents the direct blockage of Pd catalytic sites. The modified Li-O2 battery with a catalytic membrane showed a stable cyclability for 60 cycles with a capacity of 1000 mAh/g and a reduced degree of polarization ( approximately 0.3 V) compared to cells without a catalytic membrane. We demonstrate the effects of a catalytic membrane on the reaction characteristics associated with morphological and structural features of the discharge products via detailed ex situ characterization.
}, keywords = {catalyst, electrospinning, Lithium-oxygen batteries, mesoporous polymer membrane, oxygen evolution reaction}, isbn = {1530-6992 (Electronic)The use of bulk metallic glass (BMG) for the nanoimprint of high-aspect-ratio (\>3) features into functional polymers is investigated. To accomplish this, the most critical aspect is the successful demolding of the imprinted polymer. By fluorosilane functionalization of the BMG surface and optimization of processing temperature, high aspect pore features down to 45 nm diameters are introduced into the surface of two organic photovoltaic systems: poly(3-hexylthiophene-2,5-diyl) (P3HT) and 1:1 mixtures of P3HT with Phenyl-C61-butyric acid methyl ester (PCBM). The crystallinity of P3HT demands higher forming temperatures and pressures that are difficult to obtain with conventional soft nanoimprint lithography molds. The ability to accommodate a wide range of processing conditions and the low cost of fabricating molds with nanometer-scale features point to the large potential of nanotextured BMGs as an economical and scalable imprint material for high-resolution applications.
}, keywords = {bulk heterojunctions, bulk metallic glass, nanoimprint lithography, organic photovoltaics, polymer patterning}, isbn = {1944-8252 (Electronic)Understanding the interactions between catalyst and electrolyte in Li-O2 systems is crucial to improving capacities, efficiencies, and cycle life. In this study, supported noble metal catalysts Pt/C, Pd/C, and Au/C were paired with popular Li-O2 electrolyte solvents dimethoxyethane (DME), tetraglyme (TEGDME), and dimethyl sulfoxide (DMSO). The effects of these combinations on stability, kinetics, and activity were assessed. We show evidence of a synergistic effect between Pt and Pd catalysts and a DMSO-based electrolyte which enhances the kinetics of oxygen reduction and evolution reactions. DME and TEGDME are more prone to decomposition and less kinetically favorable for oxygen reduction and evolution than DMSO. While the order of oxygen reduction onset potentials with each catalyst was found to be consistent across electrolyte (Pd \> Pt \> Au), larger overpotentials with DME and TEGDME, and negative shifts in onset after only five cycles favor the stability of a DMSO electrolyte. Full cell cycling experiments confirm that catalyst-DMSO combinations produce up to 9 times higher discharge capacities than the same with TEGDME after 20 cycles ( approximately 707.4 vs. 78.8 mA h g(-1) with Pd/C). Ex situ EDS and in situ EIS analyses of resistive species in the cathode suggest that improvements in capacity with DMSO are due to a combination of greater electrolyte conductivity and catalyst synergies. Our findings demonstrate that co-selection of catalyst and electrolyte is necessary to exploit chemical synergies and improve the performance of Li-O2 cells.
}, isbn = {1463-9084 (Electronic)There is considerable interest in the controlled p-type and n-type doping of carbon nanotubes (CNT) for use in a range of important electronics applications, including the development of hybrid CNT/silicon (Si) photovoltaic devices. Here, we demonstrate that easy to handle metallocenes and related complexes can be used to both p-type and n-type dope single-walled carbon nanotube (SWNT) thin films, using a simple spin coating process. We report n-SWNT/p-Si photovoltaic devices that are \>450 times more efficient than the best solar cells of this type currently reported and show that the performance of both our n-SWNT/p-Si and p-SWNT/n-Si devices is related to the doping level of the SWNT. Furthermore, we establish that the electronic structure of the metallocene or related molecule can be correlated to the doping level of the SWNT, which may provide the foundation for controlled doping of SWNT thin films in the future.
}, isbn = {1530-6992 (Electronic)Observing the cathode interface in Li-O2 batteries during cycling is necessary to improve our understanding of discharge product formation and evolution in practical cells. In this work a gold electrode surface is monitored by operando surface-enhanced Raman spectroscopy during typical discharge and charge cycling. During discharge, we observe the precipitation of stable and reversible lithium superoxide (LiO2), in contrast to reports that suggest it is a mere intermediate in the formation of lithium peroxide (Li(2)O2). Some LiO2 is further reduced to Li(2)O2 producing a coating of insulating discharge products that renders the gold electrode inactive. Upon charging, a superficial layer of these species ( approximately 1 nm) are preferentially oxidized at low overpotentials (\<0.6 V), leaving residual products in poor contact with the electrode surface. In situ electrochemical impedance spectroscopy is also used to distinguish between LiO2 and Li(2)O2 products using frequency-dependent responses and to correlate their reduction and oxidation potentials to the accepted mechanism of Li(2)O2 formation. These operando and in situ studies of the oxygen electrode interface, coupled with ex situ characterization, illustrate that the composition of discharge products and their proximity to the catalytic surface are important factors in the reversibility of Li-O2 cells.
}, keywords = {electrochemical impedance spectroscopy, Li2O2, LiO2, lithium-air, lithium-oxygen, Raman spectroscopy, Sers}, isbn = {1944-8252 (Electronic)Oxygen removal from SWNTs is crucial for many carbon electronic devices. This work shows that HF treatment followed by current stimulation is a very effective method for oxygen removal. Using a procedure involving HF treatment, current stimulation and spin-casting AgNWs onto a SWNT thin film, record high efficiency SWNT/p-Si solar cells have been developed.
}, keywords = {carbon electronics, carbon nanotubes, Hydrofluoric acid, photovoltaic devices, silver nanowires}, isbn = {1530-6992 (Electronic)The potential applications as well as the environmental and human health implications of carbon nanomaterials are well represented in the literature. There has been a recent focus on how specific physicochemical properties influence carbon nanotube (CNT) function as well as cytotoxicity. The ultimate goal is a better understanding of the causal relationship between fundamental physiochemical properties and cytotoxic mechanism in order to both advance functional design and to minimize unintended consequences of CNTs. This study provides characterization data on a series of multiwalled carbon nanotubes (MWNTs) that underwent acid treatment followed by annealing at increasing temperatures, ranging from 400 to 900 degrees C. These results show that MWNTs can be imparted with the same toxicity as single-walled carbon nanotubes (SWNTs) by acid treatment and annealing. Further, we were able to correlate this toxicity to the chemical reactivity of the MWNT suggesting that it is a chemical rather than physical hazard. This informs the design of MWNT to be less hazardous or enables their implementation in antimicrobial applications. Given the reduced cost and ready dispersivity of MWNTs as compared to SWNTs, there is a significant opportunity to pursue the use of MWNTs in novel applications previously thought reserved for SWNTs.
}, keywords = {*Hot Temperature, Cell Survival/*drug effects, Electrochemical Techniques, Glutathione/metabolism, Nanotubes, Carbon/*toxicity, Oxidation-Reduction, Photoelectron Spectroscopy}, isbn = {1520-5851 (Electronic)Carrier transport characteristics in high-efficiency single-walled carbon nanotubes (SWNTs)/silicon (Si) hybrid solar cells are presented. The solar cells were fabricated by depositing intrinsic p-type SWNT thin-films on n-type Si wafers without involving any high-temperature process for p-n junction formation. The optimized cells showed a device ideality factor close to unity and a record-high power-conversion-efficiency of \>11\%. By investigating the dark forward current density characteristics with varying temperature, we have identified that the temperature-dependent current rectification originates from the thermally activated band-to-band transition of carriers in Si, and the role of the SWNT thin films is to establish a built-in potential for carrier separation/collection. We have also established that the dominant carrier transport mechanism is diffusion, with minimal interface recombination. This is further supported by the observation of a long minority carrier lifetime of ~34 mus, determined by the transient recovery method. This study suggests that these hybrid solar cells operate in the same manner as single crystalline p-n homojunction Si solar cells.
}, isbn = {1530-6992 (Electronic)We present a method of using inkjet printing (IJP) to deposit catalyst materials onto gas diffusion layers (GDLs) that are made into membrane electrode assemblies (MEAs) for polymer electrolyte fuel cell (PEMFC). Existing ink deposition methods such as spray painting or screen printing are not well suited\ for ultra low (\<0.5\ mg\ Pt\ cm\−2) loadings. The IJP method can be used to deposit smaller volumes of water based catalyst ink solutions with picoliter precision provided the solution properties are compatible with the cartridge design. By optimizing the dispersion of the ink solution we have shown that this technique can be successfully used with catalysts supported on different carbon black (i.e. XC-72R, Monarch 700, Black Pearls 2000, etc.). Our ink jet printed MEAs with catalyst loadings of 0.020\ mg\ Pt\ cm\−2\ have shown Pt utilizations in excess of 16,000\ mW\ mg\−1\ Pt which is higher than our traditional screen printed MEAs (800\ mW\ mg\−1\ Pt). As a further demonstration of IJP versatility, we present results of a graded distribution of Pt/C catalyst structure using standard Johnson Matthey (JM) catalyst. Compared to a continuous catalyst layer of JM Pt/C (20\%\ Pt), the graded catalyst structure showed enhanced performance.
}, url = {http://www.sciencedirect.com/science/article/pii/S0378775307001358}, author = {Taylor, Andr{\'e} D. and Thompson, Levi T.}, editor = {Kim, Edward Y.} } @article {86, title = {Nanoimprinted electrodes for micro-fuel cell applications}, journal = {Journal of Power SourcesJournal of Power Sources}, volume = {171}, number = {1}, year = {2007}, pages = {218-223}, isbn = {03787753}, author = {Taylor, Andr{\'e} D. and Lucas, Brandon D. and Guo, L. Jay and Thompson, Levi T.} }