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388 results on '"Xi, Guangcheng"'

19. Two-Orders-of-Magnitude Enhancement of SERS Activity via a Simple Surface Engineering of Quasi-Metal Single-Crystal Frameworks

Author

Song, Xiaoyu, Li, Yahui, Yin, Meng, Yi, Wencai, Liu, Wei, Li, Junfang, and Xi, Guangcheng

Abstract

Beyond noble metals and semiconductors, quasi-metals have recently been shown to be noteworthy substrates for surface enhanced Raman spectroscopy, and their excellent quasi-metal surface-enhanced Raman spectroscopy (SERS) sensing has demonstrated a wider range of application scenarios. However, the underlying mechanism behind the enhanced Raman activity is still unclear. Here, we demonstrate that surface hydroxyls play a crucial role in the enhancement of the SERS activity of quasi-metal nanostructures. As a demonstration material, quasi-metallic MoO2single-crystal frameworks rich in surface hydroxyls have been shown to have 100 times higher SERS activity than MoO2single-crystal frameworks without hydroxyl functionalization, with a Raman enhancement factor of up to 7.6 × 107. Experimental and first-principles density-functional theory calculation results show that the enhanced Raman activity can be attributed to an effective interfacial charge transfer within the MoO2/OH/molecule system.

Published
2024
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26. Contribution Degree’s Application in the Research of Elements of TCM Syndromes

Author

Zheng, Rongyao, Xi, Guangcheng, Chen, Jing, Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Doug, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Huang, De-Shuang, editor, Jo, Kang-Hyun, editor, Lee, Hong-Hee, editor, Kang, Hee-Jun, editor, and Bevilacqua, Vitoantonio, editor

Published
2009
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28. Phase Transitions Caused by Threshold in Random Neural Network and Its Medical Applications

Author

Xi, Guangcheng, Chen, Jianxin, Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Rangan, C. Pandu, editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Doug, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Liu, Derong, editor, Fei, Shumin, editor, Hou, Zengguang, editor, Zhang, Huaguang, editor, and Sun, Changyin, editor

Published
2007
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29. A Comparison of Four Data Mining Models: Bayes, Neural Network, SVM and Decision Trees in Identifying Syndromes in Coronary Heart Disease

Author

Chen, Jianxin, Xing, Yanwei, Xi, Guangcheng, Chen, Jing, Yi, Jianqiang, Zhao, Dongbin, Wang, Jie, Hutchison, David, Series editor, Kanade, Takeo, Series editor, Kittler, Josef, Series editor, Kleinberg, Jon M., Series editor, Mattern, Friedemann, Series editor, Mitchell, John C., Series editor, Naor, Moni, Series editor, Nierstrasz, Oscar, Series editor, Pandu Rangan, C., Series editor, Steffen, Bernhard, Series editor, Sudan, Madhu, Series editor, Terzopoulos, Demetri, Series editor, Tygar, Doug, Series editor, Vardi, Moshe Y., Series editor, Weikum, Gerhard, Series editor, Liu, Derong, editor, Fei, Shumin, editor, Hou, Zeng-Guang, editor, Zhang, Huaguang, editor, and Sun, Changyin, editor

Published
2007
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32. Differentiation of Syndromes with SVM

Author

Sun, Zhanquan, Xi, Guangcheng, Yi, Jianqiang, Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Dough, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Wang, Jun, editor, Yi, Zhang, editor, Zurada, Jacek M., editor, Lu, Bao-Liang, editor, and Yin, Hujun, editor

Published
2006
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33. Remarkable surface-enhanced Raman scattering of highly crystalline monolayer Ti3C2nanosheets

Author

Ye, Yuting, Yi, Wencai, Liu, Wei, Zhou, Yun, Bai, Hua, Li, Junfang, and Xi, Guangcheng

Abstract

As a powerful non-destructive and label-free detection technology, surface-enhanced Raman scattering (SERS) has been widely used in environmental-pollutant detection, biological-tissue sensing, molecular fingerprint analysis and so on. Different from the traditional SERS substrates represented by noble metals and semiconductors, herein, we report a new highly sensitive SERS substrate material with high stability, biocompatibility, and low cost, namely nucleusfree two-dimensional electron gas (2DEG) Ti3C2monolayer nanosheets. The highly crystalline monolayer Ti3C2nanosheets with clean surface are synthesized by an improved chemical exfoliation and microwave heating method. The unique structure of nucleus-free-2DEG in Ti3C2monolayer provides an ideal transport channel without nuclear scattering, which makes the highly crystalline monolayer Ti3C2nanosheets achieve a Raman enhanced factor of 3.82×108and a 10−11level detection limit for typical environmental pollutants such as azo dyes, trichlorophenol, and bisphenol A. Single-molecule imaging is also realized on the surface of the Ti3C2monolayers, which may be the first time that approximate single-molecule imaging has been achieved on a non-noblemetal SERS substrates. Preliminary toxicological experiments show that the cytotoxicity of this material is very low. Considering the facile synthesis, high biocompatibility, low cost and high chemical stability of carbide nanosheets, these Ti3C2monolayer nanosheets show significant promise for the design and fabrication of flexible SERS substrates for the sensing of trace substances with ultrahigh sensitivity.

Published
2024
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36. Multilevel Neural Network to Diagnosis Procedure of Traditional Chinese Medicine

Author

Sun, Zhanquan, Yi, Jianqiang, Xi, Guangcheng, Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Dough, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Wang, Jun, editor, Liao, Xiao-Feng, editor, and Yi, Zhang, editor

Published
2005
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37. Study Markov Neural Network by Stochastic Graph

Author

Zhao, Yali, Xi, Guangcheng, Yi, Jianqiang, Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Dough, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Wang, Jun, editor, Liao, Xiaofeng, editor, and Yi, Zhang, editor

Published
2005
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38. A Reinforcement Learning Based Radial-Bassis Function Network Control System

Author

Li, Jianing, Yi, Jianqiang, Zhao, Dongbin, Xi, Guangcheng, Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Dough, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Wang, Jun, editor, Liao, Xiaofeng, editor, and Yi, Zhang, editor

Published
2005
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