@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 = {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 {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)
1530-6984 (Linking)}, doi = {10.1021/nl503760n}, author = {Ryu, W. H. and Gittleson, F. S. and Schwab, M. and Goh, T. and Taylor, A. D.} } @article {83, title = {Nanoimprinting sub-100 nm features in a photovoltaic nanocomposite using durable bulk metallic glass molds}, journal = {ACS Appl Mater InterfacesACS Appl Mater Interfaces}, volume = {7}, number = {6}, year = {2015}, note = {Singer, Jonathan P
Gopinadhan, Manesh
Shao, Zhen
Taylor, Andre D
Schroers, Jan
Osuji, Chinedum O
eng
Letter
Research Support, Non-U.S. Gov{\textquoteright}t
Research Support, U.S. Gov{\textquoteright}t, Non-P.H.S.
2015/02/03 06:00
ACS Appl Mater Interfaces. 2015 Feb 18;7(6):3456-61. doi: 10.1021/am507368g. Epub 2015 Feb 5.}, month = {Feb 18}, pages = {3456-61}, abstract = {

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)
1944-8244 (Linking)}, doi = {10.1021/am507368g}, author = {Singer, J. P. and Gopinadhan, M. and Shao, Z. and Taylor, A. D. and Schroers, J. and Osuji, C. O.} } @article {Array, title = {Raman Spectroscopy in Lithium-Oxygen Battery Systems}, journal = {ChemElectroChem}, volume = {2}, year = {2015}, month = {Jan-10-2015}, pages = {1446 - 1457}, doi = {10.1002/celc.v2.1010.1002/celc.201500218}, url = {http://doi.wiley.com/10.1002/celc.v2.10http://doi.wiley.com/10.1002/celc.201500218http://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002\%2Fcelc.201500218}, author = {Gittleson, Forrest S. and Yao, Koffi P. C. and Kwabi, David G. and Sayed, Sayed Youssef and Ryu, Won-Hee and Shao-Horn, Yang and Taylor, A. D.} } @article {Array, title = {Ultrathin Nanotube/Nanowire Electrodes by Spin{\textendash}Spray Layer-by-Layer Assembly: A Concept for Transparent Energy Storage}, journal = {ACS Nano}, volume = {9}, year = {2015}, month = {Mar-10-2017}, pages = {10005 - 10017}, issn = {1936-0851}, doi = {10.1021/acsnano.5b03578}, url = {http://pubs.acs.org/doi/10.1021/acsnano.5b03578http://pubs.acs.org/doi/pdf/10.1021/acsnano.5b03578}, author = {Gittleson, Forrest S. and Hwang, Daniel and Ryu, Won-Hee and Hashmi, Sara M. and Hwang, Jonathan and Goh, Tenghooi and Taylor, A. D.} } @article {65, title = {Catalyst and electrolyte synergy in Li-O2 batteries}, journal = {Phys Chem Chem PhysPhys Chem Chem Phys}, volume = {16}, number = {7}, year = {2014}, note = {Gittleson, Forrest S
Sekol, Ryan C
Doubek, Gustavo
Linardi, Marcelo
Taylor, Andre D
eng
England
2014/01/11 06:00
Phys Chem Chem Phys. 2014 Feb 21;16(7):3230-7. doi: 10.1039/c3cp54555e. Epub 2014 Jan 10.}, month = {Feb 21}, pages = {3230-7}, abstract = {

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)
1463-9076 (Linking)}, doi = {10.1039/C3CP54555E}, author = {Gittleson, F. S. and Sekol, R. C. and Doubek, G. and Linardi, M. and Taylor, A. D.} } @article {70, title = {Controlled doping of carbon nanotubes with metallocenes for application in hybrid carbon nanotube/Si solar cells}, journal = {Nano LettNano Lett}, volume = {14}, number = {6}, year = {2014}, note = {Li, Xiaokai
Guard, Louise M
Jiang, Jie
Sakimoto, Kelsey
Huang, Jing-Shun
Wu, Jianguo
Li, Jinyang
Yu, Lianqing
Pokhrel, Ravi
Brudvig, Gary W
Ismail-Beigi, Sohrab
Hazari, Nilay
Taylor, Andre D
eng
Research Support, Non-U.S. Gov{\textquoteright}t
Research Support, U.S. Gov{\textquoteright}t, Non-P.H.S.
2014/05/02 06:00
Nano Lett. 2014 Jun 11;14(6):3388-94. doi: 10.1021/nl500894h. Epub 2014 May 13.}, month = {Jun 11}, pages = {3388-94}, abstract = {

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)
1530-6984 (Linking)}, doi = { 10.1021/nl500894h}, author = {Li, X. and Guard, L. M. and Jiang, J. and Sakimoto, K. and Huang, J. S. and Wu, J. and Li, J. and Yu, L. and Pokhrel, R. and Brudvig, G. W. and Ismail-Beigi, S. and Hazari, N. and Taylor, A. D.} } @article {64, title = {Operando observation of the gold-electrolyte interface in Li-O2 batteries}, journal = {ACS Appl Mater InterfacesACS Appl Mater Interfaces}, volume = {6}, number = {21}, year = {2014}, note = {Gittleson, Forrest S
Ryu, Won-Hee
Taylor, Andre D
eng
Research Support, Non-U.S. Gov{\textquoteright}t
Research Support, U.S. Gov{\textquoteright}t, Non-P.H.S.
2014/10/16 06:00
ACS Appl Mater Interfaces. 2014 Nov 12;6(21):19017-25. doi: 10.1021/am504900k. Epub 2014 Oct 31.}, month = {Nov 12}, pages = {19017-25}, abstract = {

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)
1944-8244 (Linking)}, doi = {10.1021/am504900k}, author = {Gittleson, F. S. and Ryu, W. H. and Taylor, A. D.} } @article {71, title = {Role of HF in oxygen removal from carbon nanotubes: implications for high performance carbon electronics}, journal = {Nano LettNano Lett}, volume = {14}, number = {11}, year = {2014}, note = {Li, Xiaokai
Huang, Jing-Shun
Nejati, Siamak
McMillon, Lyndsey
Huang, Su
Osuji, Chinedum O
Hazari, Nilay
Taylor, Andre D
eng
Research Support, Non-U.S. Gov{\textquoteright}t
Research Support, U.S. Gov{\textquoteright}t, Non-P.H.S.
2014/10/07 06:00
Nano Lett. 2014 Nov 12;14(11):6179-84. doi: 10.1021/nl502401c. Epub 2014 Oct 29.}, month = {Nov 12}, pages = {6179-84}, abstract = {

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)
1530-6984 (Linking)}, doi = { 10.1021/nl502401c}, author = {Li, X. and Huang, J. S. and Nejati, S. and McMillon, L. and Huang, S. and Osuji, C. O. and Hazari, N. and Taylor, A. D.} } @article {Array, title = {Toward Tailored Functional Design of Multi-Walled Carbon Nanotubes (MWNTs): Electrochemical and Antimicrobial Activity Enhancement via Oxidation and Selective Reduction}, journal = {Environmental Science \& Technology}, volume = {48}, year = {2014}, month = {Aug-05-2015}, pages = {5938 - 5945}, issn = {0013-936X}, doi = {10.1021/es500468y}, url = {http://pubs.acs.org/doi/abs/10.1021/es500468y}, author = {Gilbertson, Leanne M. and Goodwin, David G. and Taylor, A. D. and Pfefferle, Lisa and Zimmerman, Julie B.} } @article {81, title = {Bulk metallic glass micro fuel cell}, journal = {SmallSmall}, volume = {9}, number = {12}, year = {2013}, note = {Sekol, Ryan C
Kumar, Golden
Carmo, Marcelo
Gittleson, Forrest
Hardesty-Dyck, Nathan
Mukherjee, Sundeep
Schroers, Jan
Taylor, Andre D
eng
Research Support, U.S. Gov{\textquoteright}t, Non-P.H.S.
Germany
2012/11/28 06:00
Small. 2013 Jun 24;9(12):2081-5, 2026. doi: 10.1002/smll.201201647. Epub 2012 Nov 26.}, month = {Jun 24}, pages = {2081-5, 2026}, isbn = {1613-6829 (Electronic)
1613-6810 (Linking)}, doi = {10.1002/smll.201201647}, author = {Sekol, R. C. and Kumar, G. and Carmo, M. and Gittleson, F. and Hardesty-Dyck, N. and Mukherjee, S. and Schroers, J. and Taylor, A. D.} } @article {77, title = {Realizing comparable oxidative and cytotoxic potential of single- and multiwalled carbon nanotubes through annealing}, journal = {Environ Sci TechnolEnviron Sci Technol}, volume = {47}, number = {15}, year = {2013}, note = {Pasquini, Leanne M
Sekol, Ryan C
Taylor, Andre D
Pfefferle, Lisa D
Zimmerman, Julie B
eng
Comparative Study
Research Support, Non-U.S. Gov{\textquoteright}t
2013/06/28 06:00
Environ Sci Technol. 2013 Aug 6;47(15):8775-83. doi: 10.1021/es401786s. Epub 2013 Jul 26.}, month = {Aug 6}, pages = {8775-83}, abstract = {

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)
0013-936X (Linking)}, doi = {10.1021/es401786s}, author = {Pasquini, L. M. and Sekol, R. C. and Taylor, A. D. and Pfefferle, L. D. and Zimmerman, J. B.} } @article {68, title = {Record high efficiency single-walled carbon nanotube/silicon p-n junction solar cells}, journal = {Nano LettNano Lett}, volume = {13}, number = {1}, year = {2013}, note = {Jung, Yeonwoong
Li, Xiaokai
Rajan, Nitin K
Taylor, Andre D
Reed, Mark A
eng
2012/12/15 06:00
Nano Lett. 2013 Jan 9;13(1):95-9. doi: 10.1021/nl3035652. Epub 2012 Dec 17.}, month = {Jan 9}, pages = {95-9}, abstract = {

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)
1530-6984 (Linking)}, doi = {10.1021/nl3035652}, author = {Jung, Y. and Li, X. and Rajan, N. K. and Taylor, A. D. and Reed, M. A.} } @article {89, title = {Directed self-assembly of hybrid oxide/polymer core/shell nanowires with transport optimized morphology for photovoltaics}, journal = {Adv Mater}, volume = {24}, number = {1}, year = {2012}, note = {Zhang, Shanju
Pelligra, Candice I
Keskar, Gayatri
Jiang, Jie
Majewski, Pawel W
Taylor, Andre D
Ismail-Beigi, Sohrab
Pfefferle, Lisa D
Osuji, Chinedum O
eng
Research Support, U.S. Gov{\textquoteright}t, Non-P.H.S.
Germany
2011/11/25 06:00
Adv Mater. 2012 Jan 3;24(1):82-7. doi: 10.1002/adma.201103708. Epub 2011 Nov 23.}, month = {Jan 3}, pages = {82-7}, keywords = {Liquid Crystals/chemistry, Nanowires/*chemistry, Oxides/*chemistry, Polymers/*chemistry, Zinc Oxide/chemistry}, isbn = {1521-4095 (Electronic)
0935-9648 (Linking)}, author = {Zhang, S. and Pelligra, C. I. and Keskar, G. and Jiang, J. and Majewski, P. W. and Taylor, A. D. and Ismail-Beigi, S. and Pfefferle, L. D. and Osuji, C. O.} } @article {63, title = {Improving the assembly speed, quality, and tunability of thin conductive multilayers}, journal = {ACS NanoACS Nano}, volume = {6}, number = {5}, year = {2012}, note = {Gittleson, Forrest S
Kohn, David J
Li, Xiaokai
Taylor, Andre D
eng
2012/04/21 06:00
ACS Nano. 2012 May 22;6(5):3703-11. doi: 10.1021/nn204384f. Epub 2012 May 7.}, month = {May 22}, pages = {3703-11}, abstract = {While inhomogeneous thin conductive films have been sought after for their flexibility, transparency, and strength, poor control in the processing of these materials has restricted their application. The versatile layer-by-layer assembly technique allows greater control over film deposition, but even this has been hampered by the traditional dip-coating method. Here, we employ a fully automated spin-spray layer-by-layer system (SSLbL) to rapidly produce high-quality, tunable multilayer films. With bilayer deposition cycle times as low as 13 s (~50\% of previously reported) and thorough characterization of film conductance in the near percolation region, we show that SSLbL permits nanolevel control over film growth and efficient formation of a conducting network not available with other methods of multilayer deposition. The multitude of variables from spray time, to spin rate, to active drying available with SSLbL makes films generated by this technique inherently more tunable and expands the opportunity for optimization and application of composite multilayers. A comparison of several polymer-CNT systems deposited by both spin-spray and dip-coating exemplifies the potential of SSLbL assembly to allow for rapid screening of multilayer films. Ultrathin polymer-CNT multilayers assembled by SSLbL were also evaluated as lithium-ion battery electrodes, emphasizing the practical application of this technique.}, isbn = {1936-086X (Electronic)
1936-0851 (Linking)}, author = {Gittleson, F. S. and Kohn, D. J. and Li, X. and Taylor, A. D.} } @article {69, title = {Scalable fabrication of multifunctional freestanding carbon nanotube/polymer composite thin films for energy conversion}, journal = {ACS NanoACS Nano}, volume = {6}, number = {2}, year = {2012}, note = {Li, Xiaokai
Gittleson, Forrest
Carmo, Marcelo
Sekol, Ryan C
Taylor, Andre D
eng
Research Support, Non-U.S. Gov{\textquoteright}t
Research Support, U.S. Gov{\textquoteright}t, Non-P.H.S.
2012/01/13 06:00
ACS Nano. 2012 Feb 28;6(2):1347-56. doi: 10.1021/nn2041544. Epub 2012 Jan 24.}, month = {Feb 28}, pages = {1347-56}, abstract = {Translating the unique properties of individual single-walled carbon nanotubes (SWNTs) to the macroscale while simultaneously incorporating additional functionalities into composites has been stymied by inadequate assembly methods. Here we describe a technique for developing multifunctional SWNT/polymer composite thin films that provides a fundamental engineering basis to bridge the gap between their nano- and macroscale properties. Selected polymers are infiltrated into a Mayer rod coated conductive SWNT network to fabricate solar cell transparent conductive electrodes (TCEs), fuel cell membrane electrode assemblies (MEAs), and lithium ion battery electrodes. Our TCEs have an outstanding optoelectronic figure of merit sigma(dc)/sigma(ac) of 19.4 and roughness of 3.8 nm yet are also mechanically robust enough to withstand delamination, a step toward scratch resistance necessary for flexible electronics. Our MEAs show platinum utilization as high as 1550 mW/mg(Pt), demonstrating our technique{\textquoteright}s ability to integrate ionic conductivity of the polymer with electrical conductivity of the SWNTs at the Pt surface. Our battery anodes, which show reversible capacity of approximately 850 mAh/g after 15 cycles, demonstrate the integration of electrode and separator to simplify device architecture and decrease overall weight. Each of these applications demonstrates our technique{\textquoteright}s ability to maintain the conductivity of SWNT networks and their dispersion within a polymer matrix while concurrently optimizing key complementary properties of the composite. Here, we lay the foundation for the assembly of nanotubes and nanostructured components (rods, wires, particles, etc.) into macroscopic multifunctional materials using a low-cost and scalable solution-based processing technique.}, isbn = {1936-086X (Electronic)
1936-0851 (Linking)}, author = {Li, X. and Gittleson, F. and Carmo, M. and Sekol, R. C. and Taylor, A. D.} } @article {61, title = {Bulk metallic glass nanowire architecture for electrochemical applications}, journal = {ACS NanoACS Nano}, volume = {5}, number = {4}, year = {2011}, note = {Carmo, Marcelo
Sekol, Ryan C
Ding, Shiyan
Kumar, Golden
Schroers, Jan
Taylor, Andre D
eng
2011/03/05 06:00
ACS Nano. 2011 Apr 26;5(4):2979-83. doi: 10.1021/nn200033c. Epub 2011 Mar 3.}, month = {Apr 26}, pages = {2979-83}, abstract = {Electrochemical devices have the potential to pose powerful solutions in addressing rising energy demands and counteracting environmental problems. However, currently, these devices suffer from meager performance due to poor efficiency and durability of the catalysts. These suboptimal characteristics have hampered widespread commercialization. Here we report on Pt(57.5)Cu(14.7)Ni(5.3)P(22.5) bulk metallic glass (Pt-BMG) nanowires, whose novel architecture and outstanding durability circumvent the performance problems of electrochemical devices. We fabricate Pt-BMG nanowires using a facile and scalable nanoimprinting approach to create dealloyed high surface area nanowire catalysts with high conductivity and activity for methanol and ethanol oxidation. After 1000 cycles, these nanowires maintain 96\% of their performance-2.4 times as much as conventional Pt/C catalysts. Their properties make them ideal candidates for widespread commercial use such as for energy conversion/storage and sensors.}, isbn = {1936-086X (Electronic)
1936-0851 (Linking)}, author = {Carmo, M. and Sekol, R. C. and Ding, S. and Kumar, G. and Schroers, J. and Taylor, A. D.} }