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You searched on: Author: tinh nguyen

Displaying records 21 to 30 of 115 records.
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21. Critical Role of Particle/Polymer Interface in Long-term Performance of Nanofilled Polymeric Coatings
Published: 5/17/2010
Authors: Xiaohong Gu, Guodong Chen, Minhua Zhao, Stephanie S Watson, Tinh Nguyen, Joannie W Chin, Jonathan W. Martin
Abstract: In this study, the role of the nanoparticle/polymer interface in the long-term UV weathering performance of a nano-ZnO filled polyurethane (PU) coating system was investigated. The effects of the parameters that can influence the particle/polymer int ...

22. Direct Evidence of Nanoparticle Release from Epoxy Nanocomposites Exposed to UV Radiation
Published: 4/14/2010
Authors: Tinh Nguyen, Bastien T. Pellegrin, Coralie Bernard, Xiaohong Gu, Justin M Gorham, Paul E Stutzman, Alexander J. Shapiro, Walter Eric Byrd, Joannie W Chin
Abstract: This study assessed the fate of SiO2 nanoparticles (nanoSiO2) in epoxy/nanoSiO2 composites exposed to ultraviolet (UV) radiation. The matrix was a stoichiometric mixture of adiglycidyl ether of bisphenol A epoxy and an aliphatic tri-amine. Films of u ...

23. NIST Sustainable Infrastructure Material Program
Published: 3/17/2010
Authors: Jonathan W. Martin, Xiaohong Gu, Tinh Nguyen, Joannie W Chin
Abstract: NIST has initiated a research program for improving the quality of the data input for making economic sustainability assessments of polymeric infrastructure materials through improvements in the measurement science for this data. Sustainability asses ...

24. Effects of Surface Free Energy and Relative Humidity on Friction and Image Contrast Measured with Lateral Force Microscopy
Published: 3/3/2010
Authors: Tinh Nguyen, Lijiang Chen, Xiaohong Gu
Abstract: Effects of sample surface free energy (s) and relative humidity (RH) of the tip-sample environment on image contrast and friction characteristics measured with lateral force microscopy (LFM) have been investigated. Samples having a wide range ...

25. Water based Polyurethane Graphene Oxide Nanocomposites
Published: 3/3/2010
Authors: Coralie Bernard, Tinh Nguyen, Bastien T. Pellegrin, Mat Celina, Alexander J. Shapiro, Deborah L Stanley, Kar T. Tan, Sungjin Park, R. S. Ruoff, Joannie W Chin
Abstract: Graphene oxides are potentially a new class of nanomaterial to enhance multifunctional properties of polymers because of their remarkable thermal conductivity, mechanical strength, and more importantly, low cost. The graphene oxides, produced by exfo ...

26. The Effects of Humidity and Surface Free Energy on Adhesion Force between AFM Tip and a Silane Self-Assembled Monolayer Film
Published: 2/17/2010
Authors: Chien-Chao Huang, Lijiang Chen, , Xiaohong Gu, Minhua Zhao, Tinh Nguyen, Sanboh Lee
Abstract: The relationship between AFM probe-sample adhesion force and relative humidity (RH) at five different levels of surface free energy (γs) of an organic self-assembled monolayer (SAM) has been investigated. Different γs levels were achieved b ...

27. Subsurface Characterization of Carbon Nanotubes in Polymer Composites via Quantitative Electric Force Microscopy
Published: 2/3/2010
Authors: Minhua Zhao, Xiaohong Gu, Sharon E. Lowther, Cheol Park, Jerry Jean, Tinh Nguyen
Abstract: In this study, quantitative Electric Force Microscopy (EFM) characterization of CNTs dispersed in free-standing polymer composite films is pursued. The effect of experimental parameters including humidity conditions, EFM probe geometry, tip-sample ...

28. Probing Dynamic Fluorescence Properties of Single and Clustered Quantum Dots Towards Quantitative Biomedical Imaging of Cells
Published: 10/28/2009
Authors: Hyeong Gon Kang, Fuyuki Tokumasu, Matthew Lawrence Clarke, Zhenping Zhou, Jianyong Tang, Tinh Nguyen, Jeeseong Hwang
Abstract: We present results on dynamical fluorescence properties of bioconjugated nanocrystals or quantum dots (QDs) in different chemical and physical environments. A variety of QD samples were prepared and compared: isolated individual QDs, QDs aggregated ...

29. Multimodal, Nanoscale, Hyperspectral Imaging Demonstrated on Heterostructures of Quantum Dots and DNA-Wrapped Single-Wall Carbon Nanotubes
Published: 10/21/2009
Authors: Hyeong Gon Kang, Matthew Lawrence Clarke, Jianyong Tang, John Taylor Woodward IV, Shin G. Chou, Zhenping Zhou, Angela R Hight Walker, Tinh Nguyen, Jeeseong Hwang
Abstract: A multimodality imaging technique integrating atomic force, polarized Raman, and fluorescence lifetime microscopy and a 2D autocorrelation image analysis is applied to study the properties of a mesoscopic heterostucture of nanoscale materials. This ...

30. A Novel Method to Covalently Functionalize Carbon Nanotubes with Isocyanates
Published: 9/30/2009
Authors: Tinh Nguyen, Aline Granier, Kristen L Steffens, Hajin Lee, Naomi Eidelman, Jonathan W. Martin
Abstract: We have developed a novel method to covalently functionalize carbon nanotubes (CNTs) that carry free isocyanate (N=C=O) groups. NCO-functionalized CNTs (NCO-fCNTs) are very desirable, because the NCO group is highly reactive with hydrogen-active grou ...

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