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697 results on '"Xu, Jimmy"'

104. Trap-Free Heterostructure of PbS Nanoplatelets on InP(001) by Chemical Epitaxy

Author

Biadala, Louis, primary, Peng, Wenbing, additional, Lambert, Yannick, additional, Kim, Jin H., additional, Canneson, Damien, additional, Houppe, Anthony, additional, Berthe, Maxime, additional, Troadec, David, additional, Deresmes, Dominique, additional, Patriarche, Gilles, additional, Xu, Tao, additional, Pi, Xiaodong, additional, Wallart, Xavier, additional, Delerue, Christophe, additional, Bayer, Manfred, additional, Xu, Jimmy, additional, and Grandidier, Bruno, additional

Published
2019
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123. Fiber-based chemical sensing and sensing platforms with colorimetric dyes

Author

Osgood, Richard M., primary, Giardini, Stephen, primary, Hennessy, Conor, primary, Stolyarov, Alexander, primary, Kingsborough, Richard, primary, Rothschild, Mordechai, primary, Kim, Jin Ho, primary, Lee, Do-Joong, primary, Xu, Jimmy, primary, Quigley, Keegan, primary, Cantley, Lauren, primary, Tysk, Shane, primary, and Odessey, Rachel, primary

Published
2018
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134. Geometry- and size-dependence of electrical properties of metal contacts on semiconducting nanowires.

Author

Hongsik Park, Beresford, Roderic, Seungbum Hong, and Xu, Jimmy

Subjects
GEOMETRY, METALS, SEMICONDUCTORS, NANOWIRES, ELECTRIC lines
Abstract

We report on a theoretical study of the geometry-and size-dependent effects of metal-semiconductor contacts to understand the origins of significant contact effects on nanowire (NW) devices. The difference in metal-semiconductor barrier width and height for a planar and NW device is calculated based on the differences in depletion-layer width and image-force barrier-lowering effects. We calculate the ratio of the specific contact resistance of a NW contact to that of a planar contact assuming the two systems have been made of the same material set. Using a modified cylindrical transmission line model, we compare the effects of contacts in the two systems and discuss the reasons for larger contact effects in NW devices. The study suggests that the formation of a higher doping concentration in the contact regions is essential for better NW transistors. [ABSTRACT FROM AUTHOR]

Published
2010
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142. A terahertz study of taurine: Dispersion correction and mode couplings

Author

Dai, Zelin, primary, Xu, Xiangdong, additional, Gu, Yu, additional, Li, Xinrong, additional, Wang, Fu, additional, Lian, Yuxiang, additional, Fan, Kai, additional, Cheng, Xiaomeng, additional, Chen, Zhegeng, additional, Sun, Minghui, additional, Jiang, Yadong, additional, Yang, Chun, additional, and Xu, Jimmy, additional

Published
2017
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144. Two-dimensional lateral superlattices of nanostructures: nonlithographic formation by anodic membrane template

Author

Jianyu Liang, Hope Chik, Aijun Yin, and Xu, Jimmy

Subjects
Quantum wells -- Research, Aluminum oxide -- Research, Aluminum oxide -- Optical properties, Superlattices as materials -- Research, Physics
Abstract

A nonlithographic technique that uses highly ordered anodized aluminum oxide (AAO) porous membrane as template is presented as a general fabrication means for the formation of an array of vastly different two-dimensional lateral superlattices of nanostructures. It was seen that the transferred nanostructures were highly ordered with narrow size distribution and high packing density.

Published
2002

145. Cancer-associated fibroblasts maintain critical pancreatic cancer cell lipid homeostasis in the tumor microenvironment

Author

Han, Xu, Burrows, Michelle, Kim, Laura C., Xu, Jimmy P., Vostrejs, Will, Van Le, Tran Ngoc, Poltorack, Carson, Jiang, Yanqing, Cukierman, Edna, Stanger, Ben Z., Reiss, Kim A., Shaffer, Sydney M., Mesaros, Clementina, Keith, Brian, and Simon, M. Celeste

Abstract

Pancreatic ductal adenocarcinoma (PDAC) is an aggressive malignancy with abundant cancer-associated fibroblasts (CAFs) creating hallmark desmoplasia that limits oxygen and nutrient delivery. This study explores the importance of lipid homeostasis under stress. Exogenous unsaturated lipids, rather than de novosynthesis, sustain PDAC cell viability by relieving endoplasmic reticulum (ER) stress under nutrient scarcity. Furthermore, CAFs are less hypoxic than adjacent malignant cells in vivo, nominating them as a potential source of unsaturated lipids. CAF-conditioned medium promotes PDAC cell survival upon nutrient and oxygen deprivation, an effect reversed by delipidation. Lysophosphatidylcholines (LPCs) are particularly enriched in CAF-conditioned medium and preferentially taken up by PDAC cells, where they are converted to phosphatidylcholine (PC) to sustain membrane integrity. Blocking LPC-to-PC conversion inhibits PDAC cell survival and increases ER stress. These findings show a critical lipid “cross-feeding” mechanism that promotes PDAC cell survival, offering a potential metabolic target for treatment.

Published
2024
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146. Scalable physical coloration

Author

Oller, Declan, primary, Fernandes, Gustavo E., additional, Siontas, Stylianos, additional, Xu, Jimmy, additional, and Pacifici, Domenico, additional

Published
2016
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148. Conduction and rectification in NbOx- and NiO-based metal-insulator-metal diodes

Author

Osgood, Richard M., primary, Giardini, Stephen, additional, Carlson, Joel, additional, Periasamy, Prakash, additional, Guthrey, Harvey, additional, O'Hayre, Ryan, additional, Chin, Matthew, additional, Nichols, Barbara, additional, Dubey, Madan, additional, Fernandes, Gustavo, additional, Kim, Jin Ho, additional, Xu, Jimmy, additional, Parilla, Philip, additional, Berry, Joseph, additional, and Ginley, David, additional

Published
2016
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