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Author: tinh nguyen

Displaying records 21 to 30 of 111 records.
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21. 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 Tean 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

22. 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 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=904627

23. 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 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=904262

24. 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 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=902907

25. 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 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=902938

26. 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 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=903766

27. Studying Long-term Performance of a Nano-ZnO filled Waterborne Polyurethane Coating using Spectroscopies and Microscopies
Published: 9/9/2009
Authors: Xiaohong Gu, Dongmei Zhe, Stephanie S Watson, Guodong Chen, Minhua Zhao, Paul E Stutzman, Deborah L Stanley, Tinh 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

28. Degradation and Nanofiller Release of Polymer Nanocomposites Exposed to UV
Published: 7/15/2009
Authors: Tinh Nguyen, Bastien T. Pellegrin, Alexander J. Shapiro, Xiaohong 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

29. 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 Gu, Dongmei Zhe, Minhua Zhao, Guodong Chen, Nhieu Ly, Paul E Stutzman, Li Piin Sung, Tinh 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

30. Network Aggregation of CNTs at the Surface of Epoxy/MWCNT Composite Exposed to UV Radiation
Published: 3/18/2009
Authors: Tinh Nguyen, Bastien T. Pellegrin, Alexander J. Shapiro, Xiaohong Gu, Joannie W Chin
Abstract: Carbon nanotubes (CNTs) are increasingly incorporated in polymers to enhance their mechanical and electrical properties. However, organic polymers are prone to degrade when exposed to UV radiation. Therefore, CNTs in a polymer nanocomposite could ev ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=902039



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