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You searched on: Topic Area: Polymers Sorted by: date

Displaying records 11 to 20 of 554 records.
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11. Measuring order in regioregular poly(3-hexylthiophene) with solid-state 13C CPMAS NMR
Topic: Polymers
Published: 1/10/2014
Authors: Ryan C Nieuwendaal, Chad R Snyder, Dean M DeLongchamp
Abstract: We report on details of molecular packing in high molar mass poly(3-hexylthiophene) (P3HT) by solid-state 13C {1H} cross-polarization magic angle spinning (CPMAS) NMR measurements. The degree of polymer order was estimated for two films of varied dry ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=914449

12. Tailoring the Permselectivity of Water Desalination Membranes via Nanoparticle Assembly
Topic: Polymers
Published: 1/6/2014
Authors: Edwin P Chan, William Mulhearn, Jung-Hyun Lee, Daeyeon Lee, Christopher M Stafford
Abstract: : Thin film composite membranes can selectively separate mono- and di-valent ions from water via solution-diffusion of each species through a dense but ultrathin, highly crosslinked polymer ,skin‰ layer ‹ water is transported across the membrane fas ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=914717

13. Airbrushed Nanofiber Scaffolds Support Bone Marrow Stromal Cell Differentiation
Topic: Polymers
Published: 11/1/2013
Authors: Carl George Simon Jr., Wojtek J Tutak, Sumona Sarkar, Tanya M. Farooque, Jyotsnendu (Jyotsnendu) Giri, Dongbo Wang, Sheng Lin-Gibson, Joachim Kohn, Durgadas Bolikal
Abstract: Nanofiber scaffolds are effective for tissue engineering since they emulate the fibrous nanostructure of native extracellular matrix (ECM). Although electrospinning has been the most common approach for fabricating nanofiber scaffolds, airbrushi ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=912293

14. Optical Coherence Tomography for Dimensional Metrology of Lab-on-a-chip devices
Topic: Polymers
Published: 10/27/2013
Authors: Darwin R Reyes-Hernandez, Michael W Halter, Jeeseong Hwang
Abstract: Here we present a new metrology tool for the determination of the dimensions of channels from final product Lab-on-a-chip devices. Using Optical Coherence Tomography (OCT) areas of up to 12 mm x 12 mm can be imaged in less than 1 second, without the ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=914314

15. Analyzing a Co-Polymer Aramid Fiber for Use in Soft Body Armor
Topic: Polymers
Published: 10/25/2013
Authors: Walter G McDonough, Jae Hyun Kim, Nathanael A Heckert, Amanda Lattam Forster, Scott A Wight, Joy P Dunkers, Gale Antrus Holmes
Abstract: Since the well-publicized failure of body armor used by a police officer, it has become imperative that the long-term properties and performance of new fibers being considered for use be understood. The range of interest is from the molecular proper ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=914414

16. Morphing Metal-Polymer Janus Particles
Topic: Polymers
Published: 10/25/2013
Authors: Lewis M Cox, Jason Philip Killgore, Zhengwei Li, Zheng Zhang, Donna C. Hurley, Jianliang Xiao, Yifu Ding
Abstract: Shape memory polymers have the unique ability to memorize and recover their permanent shapes after being programmed to hold high strain levels up to a few hundred percent. While studies have traditionally focused on utilizing shape memory effects ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=914380

17. Single PPTA fiber tensile properties from quasi-static and high strain rate tests
Topic: Polymers
Published: 10/23/2013
Authors: Jae Hyun Kim, Nathanael A Heckert, Steven P Mates, Walter G McDonough, Kirk D Rice, Gale Antrus Holmes
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=914410

18. Swelling of Ultrathin Molecular Layer-by-Layer Polyamide Water Desalination Membranes
Topic: Polymers
Published: 9/30/2013
Authors: Edwin P Chan, Allison P Young, Jung-Hyun Lee, Christopher M Stafford
Abstract: The water vapor swelling behavior of ultrathin crosslinked aromatic polyamide films, synthesized via molecular layer-by-layer deposition, is characterized via specular X-ray reflectivity. The results show that these films expand only along the thickn ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=913915

19. Total free energy governs cell morphology ‹ A possible solution to obtain intrinsic cell modulus
Topic: Polymers
Published: 9/26/2013
Authors: Martin Y Chiang, Yanzi Yangben , Nancy J Lin, Li Yang
Abstract: Cells adjust their morphology in response to physical and chemical interactions with their environment. In this report, we deem that the fundamental nature of free energies associated with cell/substrate interactions regulates adherent cell morpholog ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=909671

20. Feeling Small: Exploring the tactile perception limits
Topic: Polymers
Published: 9/12/2013
Authors: Lisa Skedung, Martin Arvidsson, Jun Y. Chung, Christopher M Stafford, Birgitta Berglund, Mark W. Rutland
Abstract: The human finger is exquisitely sensitive in distinguishing different materials, but the question remains as to what length scales are capable of being discriminated in active touch? We combine psychophysical approaches with materials science to man ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=911683



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