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Author: tinh nguyen

Displaying records 21 to 30 of 112 records.
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21. Effects of Surface Free Energy and Relative Humidity on Friction and Image Contrast Measured with Lateral Force Microscopy
Published: 3/3/2010
Authors: Tinh T. Nguyen, Lijiang Chen, Xiaohong X. 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 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=904993

22. Water based Polyurethane Graphene Oxide Nanocomposites
Published: 3/3/2010
Authors: Coralie Bernard, Tinh T. 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 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=904994

23. 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 X. Gu, Minhua Zhao, Tinh T. 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 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=904627

24. Subsurface Characterization of Carbon Nanotubes in Polymer Composites via Quantitative Electric Force Microscopy
Published: 2/3/2010
Authors: Minhua Zhao, Xiaohong X. Gu, Sharon E. Lowther, Cheol Park, Jerry Jean, Tinh T. 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 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=904262

25. 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 T. 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 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=902907

26. 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 T. 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 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=902938

27. A Novel Method to Covalently Functionalize Carbon Nanotubes with Isocyanates
Published: 9/30/2009
Authors: Tinh T. 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 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=903766

28. Studying Long-term Performance of a Nano-ZnO filled Waterborne Polyurethane Coating using Spectroscopies and Microscopies
Published: 9/9/2009
Authors: Xiaohong X. Gu, Dongmei Zhe, Stephanie S Watson, Guodong Chen, Minhua Zhao, Paul E Stutzman, Deborah L Stanley, Tinh T. Nguyen, Joannie W Chin, Jonathan W. Martin
Abstract: Although inorganic UV absorbers such as zinc oxide (ZnO) and cerium oxide (CeO2) exhibit numerous advantages compared to organic UV absorbers, the mechanisms of how these nanoparticles affect the long-term performance of polymeric coatings are less t ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=903215

29. Degradation and Nanofiller Release of Polymer Nanocomposites Exposed to UV
Published: 7/15/2009
Authors: Tinh T. Nguyen, Bastien T. Pellegrin, Alexander J. Shapiro, Xiaohong X. Gu, Joannie W Chin
Abstract: Nanofillers are increasingly used to enhance multifunctional properties of polymers. However, recent research suggests that nanomaterials may have a negative impact on the environmental health and safety. Since polymers are susceptible to photodegrad ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=902990

30. Long-Term Performance of Nano-Filled Polymeric Materials: Effect of ZnO Nanoparticles on Photodegradation of a Waterborne Polyurethane Coating
Published: 7/8/2009
Authors: Xiaohong X. Gu, Dongmei Zhe, Minhua Zhao, Guodong Chen, Nhieu Ly, Paul E Stutzman, Li Piin Sung, Tinh T. Nguyen, Joannie W Chin
Abstract: Polymers are widely used as exterior coatings in buildings, bridges, aircrafts and automobiles for both protection and aesthetic purposes. However, the service life of the applied coatings is limited due to the photodegradation of polymers induced by ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=902293



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