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604 results on '"Wu, Nianqiang"'

209. Effect of Fiber Length on Carbon Nanotube-Induced Fibrogenesis

Author

Manke, Amruta, primary, Luanpitpong, Sudjit, additional, Dong, Chenbo, additional, Wang, Liying, additional, He, Xiaoqing, additional, Battelli, Lori, additional, Derk, Raymond, additional, Stueckle, Todd, additional, Porter, Dale, additional, Sager, Tina, additional, Gou, Honglei, additional, Dinu, Cerasela, additional, Wu, Nianqiang, additional, Mercer, Robert, additional, and Rojanasakul, Yon, additional

Published
2014
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214. Tailoring Optical Properties of a Large-Area Plasmonic Gold Nanoring Array Pattern

Author

Kasani, Sujan, Zheng, Peng, and Wu, Nianqiang

Abstract

A new fabrication route, which combines nanosphere lithography with silicon-based clean-room microfabrication processes, has been developed to produce large-area long-range ordered gold nanoring array patterns in a controllable fashion. Both the experimentation and the finite-difference time-domain (FDTD) simulation show that the surface plasmon resonance peak (SPR) of the nanoring array pattern can be tuned systematically in a large spectral range by varying the geometry parameters such as the ring thickness, the ring height, the ringer outer diameter, and the gap between neighboring rings. For the Au nanoring arrays with a large gap in the absence of plasmon coupling between neighboring rings, the local electromagnetic (EM) field enhancement occurs at both the outer and inner surfaces of individual nanorings; and the periodicity of Au nanoring array has no any effect on the plasmonic properties. For the Au nanoring arrays with a small gap, plasmon coupling takes place between neighboring rings. As a result, the characteristic plasmonic band is split into two new peaks corresponding to a bonding SPR mode and an antibonding SPR mode. The local EM field enhancement becomes stronger with a decrease in the gap between neighboring rings, but the SPR peaks shift away. Therefore, to maximize the surface-enhanced Raman scattering signal, the geometry parameters of the Au nanoring array need to be tuned to balance the contributions from the resonance excitation (spectral overlap) and the local EM field enhancement.

Published
2018
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220. Asymmetric Silver “Nanocarrot” Structures: Solution Synthesis and Their Asymmetric Plasmonic Resonances

Author

Liang, Hongyan, primary, Rossouw, David, additional, Zhao, Haiguang, additional, Cushing, Scott K., additional, Shi, Honglong, additional, Korinek, Andreas, additional, Xu, Hongxing, additional, Rosei, Federico, additional, Wang, Wenzhong, additional, Wu, Nianqiang, additional, Botton, Gianluigi A., additional, and Ma, Dongling, additional

Published
2013
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233. Investigation of band gap narrowing in nitrogen-doped La2Ti2O7 with transient absorption spectroscopy.

Author

Yost, Brandon T., Cushing, Scott K., Meng, Fanke, Bright, Joeseph, Bas, Derek A., Wu, Nianqiang, and Bristow, Alan D.

Abstract

Doping a semiconductor can extend the light absorption range, however, it usually introduces mid-gap states, reducing the charge carrier lifetime. This report shows that doping lanthanum dititinate (La2Ti2O7) with nitrogen extends the valence band edge by creating a continuum of dopant states, increasing the light absorption edge from 380 nm to 550 nm without adding mid-gap states. The dopant states are experimentally resolved in the excited state by correlating transient absorption spectroscopy with a supercontinuum probe and DFT prediction. The lack of mid-gap states is further confirmed by measuring the excited state lifetimes, which reveal the shifted band edge only increased carrier thermalization rates to the band edge and not interband charge recombination under both ultraviolet and visible excitation. Terahertz (time-domain) spectroscopy also reveals that the conduction mechanism remains unchanged after doping, suggesting the states are delocalized. [ABSTRACT FROM AUTHOR]

Published
2015
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238. Acute pulmonary dose–responses to inhaled multi-walled carbon nanotubes

Author

Porter, Dale W., primary, Hubbs, Ann F., additional, Chen, Bean T., additional, McKinney, Walter, additional, Mercer, Robert R., additional, Wolfarth, Michael G., additional, Battelli, Lori, additional, Wu, Nianqiang, additional, Sriram, Krishnan, additional, Leonard, Stephen, additional, Andrew, Michael, additional, Willard, Patsy, additional, Tsuruoka, Shuji, additional, Endo, Morinobu, additional, Tsukada, Takayuki, additional, Munekane, Fuminori, additional, Frazer, David G., additional, and Castranova, Vincent, additional

Published
2012
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239. Differential Mouse Pulmonary Dose and Time Course Responses to Titanium Dioxide Nanospheres and Nanobelts

Author

Porter, Dale W., primary, Wu, Nianqiang, additional, Hubbs, Ann F., additional, Mercer, Robert R., additional, Funk, Kathleen, additional, Meng, Fanke, additional, Li, Jiangtian, additional, Wolfarth, Michael G., additional, Battelli, Lori, additional, Friend, Sherri, additional, Andrew, Michael, additional, Hamilton, Raymond, additional, Sriram, Krishnan, additional, Yang, Feng, additional, Castranova, Vincent, additional, and Holian, Andrij, additional

Published
2012
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249. In situ construction of a titanate–silver nanoparticle–titanate sandwich nanostructure on a metallic titanium surface for bacteriostatic and biocompatible implants

Author

Ren, Na, primary, Li, Rui, additional, Chen, Limei, additional, Wang, Guancong, additional, Liu, Duo, additional, Wang, Yingjun, additional, Zheng, Lin, additional, Tang, Wei, additional, Yu, Xiaoqiang, additional, Jiang, Huaidong, additional, Liu, Hong, additional, and Wu, Nianqiang, additional

Published
2012
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