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Optics and Photonics Journal 2013年第5期3卷 13-23页

作者： Rachel A. Davies Ngee S. Chong Beng Guat ooi Department of Chemistry Middle Tennessee State University Murfreesboro USA

While Raman spectroscopy is a useful method for analyzing many organic compounds, it is limited by relatively low sensitivity. Therefore, Surface Enhanced Raman Spectroscopy (SERS) based on the adsorption of organic analytes onto gold or silver nanostructures has been used to enhance the signal of chemicals presented at very low concentrations. Although the plasmonic effect of SERS has been shown to play a large role in signal enhancement, the significance of the chemical effect due to the analyte chemisorption on the gold or silver surface is less well understood. In this study, the role of aniline substituents is examined by probing the SERS intensities of various anilines in silver and gold colloids using a Raman spectrometer with an excitation wavelength of 785 nm. The SERS enhancement factors and detection limits for aniline and its mono- and di-substituted ortho derivatives are determined and compared. Both the steric requirements of chemisorption and the inductive effects of electron-withdrawal due to the substituents affect the signal intensities of various vibrational modes of the amino group and the aromatic ring. The degree of enhancement is also related to the methods for preparing the silver and gold colloids, which are characterized by probing the nanoparticle morphology and its degree of aggregation using transmission electron microscopy (TEM).

关键词： SERS Raman Enhancement Factors Aniline Derivatives Ortho-Substituent Nanoparticle TEM Characterization

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Elucidating the Chemisorption Phenomena in SERS Studies via Computational Modeling

丛书名：英语轻松上口

2003年

作者：唐玮（英）Nichdas Britton （英）Saruantha ooi-Griffiths朗读

封面题：随书附2片CD:本书按照学校日常学习、生活中各种环境和场景，通过情景对话的形式，并且每个对话单元围绕一个中心话题，收录精炼易记的句子。

ISBN: (纸本)7504840084

关键词：英语口语

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Optics and Photonics Journal 2018年第6期8卷 212-234页

作者： Yvonne E. Ejorh William H. Ilsley Beng Guat ooi Department of Chemistry Middle Tennessee State University Murfreesboro TN USA

Colloidal gold solutions with nanostars and nanospheres as well as KlariteTM gold and gold-copper bimetallic substrates were used for SERS analysis of aniline and nitroaniline isomers to investigate their chemisorption phenomena. Computational modeling based on Density Functional Theory (DFT) was used in conjunction with the SERS analysis to study the adsorption behaviors of the analytes on metal surfaces. Gold nanospheres and KlariteTM samples produced about a 10-fold increase in signal enhancement compared to gold nanostars for the SERS analysis of aniline, nitroaniline isomers, and nitrobenzene. Signal enhancement is significantly greater for aniline compared to nitrobenzene and it is dependent on the proximity of the NH2 to the NO2 group for the nitroaniline isomers. Charge-transfer in chemisorbed analytes is an important contributing factor for SERS signal. The relative strengths of enhancement can be predicted by the DFT calculation of the HOMO-LUMO energy gaps of the analyte-metal cluster. Aniline and the three nitroaniline isomers showed stronger preference for the copper substrates if both the gold and copper substrates are present. The NO2 group in 2-nitroaniline has a very strong preference and affinity for the copper in the Au-Cu bimetallic cluster.

关键词： Surface-Enhanced Raman Spectroscopy (SERS) Nitroaniline Isomers Nanoparticles Charge-Transfer Chemisorption Density Functional Theory (DFT)

人工智能2.0与教育信息化2.0背景下的职业教育——来自第三届中美智慧教育大会的观点

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中国远程教育 2019年第1期 18-22页

作者：尹霞雨吕芳卓刘梦蓉 ooi Pey Shin 北京师范大学智慧学习研究院

2018年3月18日至20日,第三届中美智慧教育大会在北京召开,大会由北京师范大学、美国北得克萨斯大学、互联网教育智能技术及应用国家工程实验室联合主办,北京师范大学智慧学习研究院、中国教育与社会发展研究院、美国教育传播与技术协会... 详细信息

2018年3月18日至20日,第三届中美智慧教育大会在北京召开,大会由北京师范大学、美国北得克萨斯大学、互联网教育智能技术及应用国家工程实验室联合主办,北京师范大学智慧学习研究院、中国教育与社会发展研究院、美国教育传播与技术协会共同承办。大会发布了首份针对中国职业教育的地平线报告——《2018中国职业教育技术展望:地平线项目报告》。中美两国教育信息化领域的众多专家和学者针对两国及世界其他国家在职业教育领域的信息化变革展开了深入的交流与互动。本次大会聚焦于人工智能2.0和教育信息化2.0,探讨了如何充分发挥智慧教育在职业教育变革中的关键作用,以助力职业教育及其信息化的发展。

关键词：教育信息化人工智能智慧教育职业教育地平线报告互联网+教育智慧学习新媒体联盟

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Ionic Mechanisms for the Acute Nociceptive Signals Induced by Bradykinin

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生物物理学报 2009年第S1期25卷 51-51页

作者： Linley JE ooi L Gamper N Institute of Membrane and Systems Biology Faculty of Biological Science University of Leeds Leeds UK

Bradykinin is an inflammatory mediator and one of the most potent endogenous pain-inducing substances. When released at the site of tissue damage or inflammation

关键词： Ionic Mechanisms for the Acute Nociceptive Signals Induced by Bradykinin DRG

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Seagrass proteins: Sources of health-promoting agents awaiting exploration?

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Food Innovation and Advances 2023年第1期2卷 18-20页

作者： Tsun-Thai Chai Jillian Lean Sim ooi Fai-Chu Wong Department of Chemical Science Faculty of ScienceUniversiti Tunku Abdul Rahman31900 KamparMalaysia Center for Agriculture and Food Research Universiti Tunku Abdul Rahman31900 KamparPerakMalaysia Department of Geography Faculty of Arts and Social SciencesUniversiti Malaya50603 Kuala LumpurMalaysia

Seagrasses are marine plants that form economically and ecologically important ecosystems in coastal seas around the *** seaweeds,another group of marine flora,seagrasses are flowering and seed-bearing ***,there are only 72 known species of seagrasses,distributed over six bioregions,spanning from the Temperate North Atlantic to the Temperate Southern Ocean[1].This contrasts with 295,383 species of terrestrial flowering plants[2]and 225,000 species of seaweeds known to science[3].

关键词： ecosystems coastal marine

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大豆油调和不同熔点棕榈液油的冷藏试验

食品科学 2012年第14期33卷 277-280页

作者：吴苏喜刘立萍李慧 ooi Cheng KEAT 长沙理工大学化学与生物工程学院湖南长沙410004 马来西亚棕榈油总署棕榈油技术研发中心(上海) 上海201108

为了制备适应不同储存温度的豆油-棕榈液油调和油,以大豆油与不同熔点棕榈液油为原料,采用冷藏试验方法优化抑晶剂种类、用量和调和油配方。结果表明,羟基硬脂精是效果最佳的抑晶剂,其最佳添加量为0.025%;调和油1(豆油70%+10℃棕榈油30%... 详细信息

为了制备适应不同储存温度的豆油-棕榈液油调和油,以大豆油与不同熔点棕榈液油为原料,采用冷藏试验方法优化抑晶剂种类、用量和调和油配方。结果表明,羟基硬脂精是效果最佳的抑晶剂,其最佳添加量为0.025%;调和油1(豆油70%+10℃棕榈油30%+羟基硬脂精0.025%)在0℃环境下储存可保持16h以上澄清透亮,在5℃条件可保持72h以上澄清透亮;调和油2(豆油70%+18℃棕榈油30%+羟基硬脂精0.025%)在10℃环境下可保持30h以上澄清透亮;调和油3(豆油60%+18℃棕榈油40%+羟基硬脂精0.025%)在15℃环境下可保持20h以上澄清透亮;调和油4(豆油60%+24℃棕榈油40%+羟基硬脂精0.025%)在20℃环境下可保持10h以上澄清透亮。

关键词：大豆油棕榈液油调和油冷藏试验

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Compact CPW-to Microstrip transition design for MMIC packaging

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Compact CPW-to Microstrip transition design for MMIC packagi...

Large-scale and high-quality Ⅲ-nitride membranes through microcavity-assisted crack propagation by engineering tensile-stressed Ni layers

2006 7th International Symposium on Antennas, Propagation and EM Theory

作者： Yijing Fan Ban Leong ooi Leong Mook Seng National University of Singapore Dept of ECE10 Kent Ridge CrescentSingapore 119260

In MMIC circuit design,the transitions and interconnects are essential components for integration and packaging[1-3].However,the conventional distributed type transition circuits will result in great loss owing to their huge size,most especially in medium and low frequency *** this paper,a new CPW-to-Microstrip transition design based on lumped element circuits is *** optimized design can achieve a return loss of less than 10 dB from 3 to 14GHz and insertion loss of less than 1 dB from 3 to 14GHz.

关键词： CPW Compact CPW-to Microstrip transition design for MMIC packaging

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Opto-Electronic Science 2022年第10期1卷 45-55页

作者： Jung-hong Min Kwangjae Lee Tae-Hoon Chung Jung-Wook Min Kuang-Hui Li Chun hong Kang Hoe-Min Kwak Tae-Hyeon Kim Youyou Yuan Kyoung-Kook Kim Dong-Seon Lee Tien Khee Ng Boon S.ooi Photonics Laboratory Computer Electrical and Mathematical Sciences and Engineering Division (CEMSE) King Abdullah University of Science and Technology (KAUST) Department of Electrical Engineering Stanford University Light Source Research Division Korea Photonics Technology Institute (KOPTI) School of Electrical Engineering and Computer Science Gwangju Institute of Science and Technology Department of Advanced Convergence Technology Research Institute of Advanced Convergence Technology Korea Polytechnic University King Abdullah University of Science and Technology (KAUST)

Epitaxially grown Ⅲ-nitride alloys are tightly bonded materials with mixed covalent-ionic bonds. This tight bonding presents tremendous challenges in developing Ⅲ-nitride membranes, even though semiconductor membranes can provide numerous advantages by removing thick, inflexible, and costly substrates. Herein, cavities with various sizes were introduced by overgrowing target layers, such as undoped GaN and green LEDs, on nanoporous templates prepared by electrochemical etching of n-type GaN. The large primary interfacial toughness was effectively reduced according to the design of the cavity density, and the overgrown target layers were then conveniently exfoliated by engineering tensile-stressed Ni layers. The resulting Ⅲ-nitride membranes maintained high crystal quality even after exfoliation due to the use of GaN-based nanoporous templates with the same lattice constant. The microcavity-assisted crack propagation process developed for the current Ⅲ-nitride membranes forms a universal process for developing various kinds of largescale and high-quality semiconductor membranes.

关键词： Ⅲ-nitride alloys membranes nanoporous Ni stressor light-emitting diodes ultraviolet photodetectors

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