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  1. No Access

    Article

    High-Resolution Transmission Electron Microscope Analysis of Tungsten Carbide Thin Films

    Electron diffraction patterns and high-resolution transmission electron microscope (HREM) images show that the dominant phase in tungsten carbide thin films grown by plasma enhanced chemical vapor deposition i...

    Wentao Qin, W. Shih, J. Lib, W. James, H. Siriwardaneane… in MRS Online Proceedings Library (1998)

  2. No Access

    Article

    Influence of Viscoelastic Behavior on Curl of Paper

    The influence of viscoelastic stress relaxation on the curlresponse of paper subjected to transient humidity changes wasinvestigated numerically and experimentally. We considered asymmetrictwo-ply paper sheets...

    Wentao Lu, Leif A. Carlsson in Mechanics of Time-Dependent Materials (2001)

  3. No Access

    Article

    Effect of interfacial interaction on morphology and mechanical properties of PP/POE/BaSO4 ternary composites

    Ternary composites of Polypropylene (PP)/ethylene-octene copolymer (POE)/Barium Sulfate (BaSO4)(PP/POE/BaSO4) were prepared through a two-step process: BaSO4 master-batches were first prepared through blending of...

    Zhen Li, Shaoyun Guo, Wentao Song, Bin Hou in Journal of Materials Science (2003)

  4. No Access

    Article

    Process Control of Epi-Layers for SiGe:C Hetero-Structure Bipolar Transistors

    The SiGe:C hetero-structure bipolar transistor (HBT) has turned into a key technology for wireless communication. This paper describes the metrology tools for SiGe epitaxy process control. Two types of analysi...

    Qianghua **e, Erika Duda, Mike Kottke, Wentao Qin… in MRS Online Proceedings Library (2003)

  5. No Access

    Article

    Surface Oxide Evolution on Al-Si Bond Wires

    Al-Si wires are often used to make contact to bond-pads of semiconductor chips and devices. During operation in certain types of devices the wires typically reach relatively high temperatures. Under such circu...

    Wentao Qin, Ray Doyle, Tom Scharr, Mahesh Shah… in MRS Online Proceedings Library (2004)

  6. No Access

    Article

    Oxide Reduction in Advanced Metal Stacks for Microelectronic Applications

    Aluminum and copper are widely used for microelectronic interconnect applications. Interfacial oxides can cause device performance degradation and failure by significantly increasing electrical resistance. Int...

    Wentao Qin, Alex A. Volinsky, Dennis Werho… in MRS Online Proceedings Library (2004)

  7. No Access

    Article

    Optical and Dielectric Properties of Eu- and Y-Polytantalate Thin Films

    Due to their highly efficient photo-luminescent (PL) characteristics, the physical properties of rare-earth polytantalates, RETa7O19 (RE=Eu and Y) were further studied. AFM, SEM, HRTEM, x-ray reflectometry, spect...

    Vladimir Vasilyev, Alvin Drehman, Helen Dauplaise… in MRS Online Proceedings Library (2004)

  8. No Access

    Article

    Structure Analysis of Co/Re Superlattice Grown on an Al2O3 (110) Substrate

    The structure of a Re(5 nm)/(Co(2 nm)/Re(3 nm))19 sample grown via magnetron sputtering was thoroughly analyzed via x-ray reflectivity (XRR) and transmission electron microscopy (TEM). Cross-sectional TEM results...

    Wentao Xu, Timothy Charlton, Lance E. De Long… in MRS Online Proceedings Library (2004)

  9. No Access

    Article

    Novel Method for Spectrophotometric Determination of L-Tryptophan in the Enzymatic Resolution of DL-N-Acetyl-Tryptophan

    A novel spectrophotometric method for the determination of tryptophan (Trp) has been proposed. The sensitive and simple method was based upon the finding that NaNO2 and Trp formed a diazotized product in nitric a...

    Wentao Yu, Hongman Zhang, Guosong Chen, Chunyan Tu, **kai Ouyang in Microchimica Acta (2004)

  10. No Access

    Article

    Growth of SiGe film by using a single-wafer rapid thermal processing UHV/CVD system

    Ultra-high-vacuum chemical vapor deposition (UHV/CVD) system displays excellent performance for the growth of high-quality SiGe film. Investigations have shown that have shown that SiGe film grown by this syst...

    Wentao Huang, Changchun Chen, **you Li, **aoyi **ong… in Metals and Materials International (2004)

  11. No Access

    Article

    Composition determination of Si/Si1−xGex/Si by photoreflectance spectroscopy

    UHVCVD-grown Si/Si1−xGex/Si heterostructure is investigated by photoreflectance spectroscopy (PR). The principle of PR in determining Ge content of a Si1−xGex epilayer is thoroughly described. The unambiguous E1 ...

    Changchun Chen, P. V. Kelly, Zhihong Liu… in Metals and Materials International (2004)

  12. No Access

    Article

    Towards 3D image-based nanocrystallography by means of transmission electron goniometry

    It is well known that the crystallographic phase and morphology of many materials changes with the crystal size in the tens of nanometer range and that many nanocrystals possess structural defects in excess of...

    Peter Moeck, Wentao Qin, Philip B. Fraundorf in MRS Online Proceedings Library (2004)

  13. No Access

    Article

    Uniform dome-shaped self-assembled Ge islands by UHV/CVD after boron pre-deposition

    Effect of pre-deposited boron atoms on self-assembled growth of Ge islands on Si(100) substrate by UHV/CVD was investigated by atomic force microscopy (AFM). Proportion of dome-shaped Ge islands increases with...

    Ning Deng, Wentao Huang, Peiyi Chen in MRS Online Proceedings Library (2004)

  14. No Access

    Article

    Synthesis, structure and nonlinear optical properties of a two-photon photopolymerization initiator

    The target compound, Trans-4-(N-2-hydroxyethyl-N-ethyl amino)-4′-(diethyl amino)stilbene, has been synthesized and characterized. The one-photon fluorescence and its lifetimes, two-photon fluorescence and solvent...

    Yunxing Yan, Xutang Tao, Yuanhong Sun, Wentao Yu… in Journal of Materials Science (2005)

  15. No Access

    Article

    Preparation of Highly Dispersed Iron Oxide Nanoparticles in Amine-Modified SBA-15

    Silica-supported iron oxide nanoparticles are prepared by precipitation within the pores of amine-functionalized SBA-15 silica. The loading of the iron oxide possible by this method is at least 11 wt%. STEM an...

    Bing Tan, Wentao Xu, Alan Dozier, Stephen E. Rankin in MRS Online Proceedings Library (2006)

  16. No Access

    Article

    Mesocarbon microbeads supported PtSn catalysts for electrochemical oxidation of ethanol

    Mesocarbon microbeads (MCMB) supported PtSn catalysts were prepared by alcohol reduction method and characterized by XRD, FESEM and EDX. XRD results show that the addition of Sn to Pt/MCMB extends the fcc latt...

    Yuxia Bai, **feng Li, ** Qiu, Jianjun Wu… in Journal of Materials Science (2007)

  17. No Access

    Article

    Amphiphilic norbornene-based diblock copolymers containing polyhedral oligomeric silsesquioxane prepared by living ring opening metathesis polymerization

    We report the successful synthesis of poly(NBECOOH-b-NBEPOSS) copolymers, taking advantage of the sequential, living ring opening metathesis polymerization of NBETMS and NBEPOSS using the RuCl2 (=CHPh)(PCy3)2/CH2

    Su-Dong Park, Wentao Xu, Chanhong Chung, Younghwan Kwon in Macromolecular Research (2008)

  18. No Access

    Article

    Morphology studies of poly(ethylene terephthalate)/silica nanocomposites

    Poly(ethylene terephthalate)/silica nanocomposites have been prepared through in situ polymerization. The morphology was investigated by atomic force microscopy in the tap** mode and scanning electron micros...

    Wentao Liu, Linlin Wu, **ngyou Tian, ** Zheng, ** Cui, Suqin He… in Polymer Bulletin (2010)

  19. No Access

    Article

    Preparation and characterization of LiFePO4/graphene-oxide composites

    LiFePO4/graphene-oxide (GNO) composites were prepared by co-precipitation method. Their structure and morphology were investigated by X-ray diffraction, Fourier transform infrared spectra, field emission scanning...

    Hongming Yu, Ruijun Pan, Xuefei Chen, Wentao Song… in MRS Online Proceedings Library (2011)

  20. No Access

    Article

    Application of FIB/SEM and TEM to Bit Failure Analyses in SRAM Arrays

    Many microelectronic chips contain embedded memory arrays. A single SRAM bit-cell contains several transistors. Failure of any of the transistors makes the entire bit-cell inoperable. Dual-beam Focused Ion Bea...

    Wentao Qin, Alex Volinsky, Larry Rice, Lorraine Johnston… in MRS Online Proceedings Library (2011)

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