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Topic Area: Advanced Materials

Displaying records 11 to 20 of 75 records.
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11. Atom-Probe Tomographic Study of ¿/¿' Interfaces and Compositions in an Aged Co-Al-W Superalloy
Topic: Advanced Materials
Published: 12/12/2012
Authors: Eric Lass, Kil Won Moon, Maureen E Williams, Carelyn E Campbell, Ursula R Kattner, David Christophe Dunand, Peter J Bocchini, David N Seidman
Abstract: Atom-probe tomography (APT) is utilized to investigate, in a Co-9.7Al-10.8W at.% alloy aged at 900 °C for ~1000 h, the phase composition and partitioning behavior of the two-phase ɣ(f.c.c.)/ɣ'(L12) microstructure. The APT composition of the ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=911856

12. Nanoscale Specific Heat Capacity Measurements Using Optoelectronic Bilayer Microcantilevers
Topic: Advanced Materials
Published: 12/12/2012
Authors: Brian G. (Brian Gregory) Burke, William A Osborn, Richard Swift Gates, David A LaVan
Abstract: We describe a new technique for optically and electrically detecting and heating bilayer microcantilevers (Pt−SiNx) to high temperatures at fast heating rates for nanoscale specific heat capacity measurements. The bilayer microcantilever acts s ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=912233

13. An automated spin-assisted approach for molecular layer-by-layer assembly of crosslinked polymer thin films
Topic: Advanced Materials
Published: 11/28/2012
Authors: Edwin P Chan, Jung-Hyun Lee, Jun-Young Chung, Christopher M Stafford
Abstract: We present the design of an automated spin-coater that facilitates fabrication of polymer films based on molecular layer-by-layer (mLbL) assembly. Specifically, we demonstrate the synthesis of ultrathin crosslinked fully-aromatic polyamide films ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=912301

14. Effect of offset values of solid freeform fabricated PCL/ß-TCP scaffolds on mechanical properties and cellular activities in bone tissue regeneration
Topic: Advanced Materials
Published: 11/1/2012
Authors: Carl George Simon Jr, GeunHyung Kim, MyungGu Yo
Abstract: Microstructures of biomedical scaffolds can greatly affect cellular activities in tissue regeneration. In particular, scaffolds used in bone tissue regeneration should have several microstructural characteristics, including high porosity, appropriate ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=910879

15. Giant piezoelectricity in PMN-PT thin films: Beyond PZT
Topic: Advanced Materials
Published: 11/1/2012
Authors: S. H. Baek, M. S. Rzchowski, Vladimir A Aksyuk
Abstract: Micro-electromechanical systems (MEMS) incorporating piezoelectric layers provide active transduction between electrical and mechanical energy, which enables highly sensitive sensors and low-voltage driven actuators surpassing the passive operation o ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=912113

16. Anisotropic, Hierarchical Surface Patterns via Surface Wrinkling of Nanoimprinted Polymer Films
Topic: Advanced Materials
Published: 10/22/2012
Authors: Junghyun Lee, Hyun W. Ro, Rui Huang, Thomas Avery Germer, Paul Lemaillet, Christopher L Soles, Christopher M Stafford
Abstract: we demonstrated the wrinkling behavior of nanopatterned PS films, whose wrinkle wavelength and resultant morphology depend strongly on geometric parameters of surface patterns as well as the direction of the applied strain relative to the nanopattern ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=912044

17. Controlling Thermochromism in a Photonic Block Copolymer Gel
Topic: Advanced Materials
Published: 9/26/2012
Authors: Joseph J Walish, Yin Fan , Andrea Centrone, Edwin L. Thomas
Abstract: Controlling the color via temperature-induced changes of self-assembled photonic materials is important for their application in sensors and displays. The thermochromic behavior of a PS-P2VP photonic gel was studied (UV-VIS, FTIR) and found to origin ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=910499

18. Nucleation products of ligated nanoclusters unaffected by temperature and reducing agent
Topic: Advanced Materials
Published: 8/27/2012
Authors: John M Pettibone, Nicole R Reardon
Abstract: Atomically uniform nucleation products of ligated metal nanoclusters are observed irrespective of reduction conditions for metal-bidentate ligand systems. Monodentate ligands are not reported to wield similar control, indicating steric contributions ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=911795

19. INVESTIGATING THE MECHANISM OF ENZYME-CATALYZED RING-OPENING COPOLYMERIZATIONS
Topic: Advanced Materials
Published: 8/19/2012
Authors: Matthew T. (Matthew) Hunley, Fahriye Nese Sari, Kathryn L Beers
Abstract: As the research interest in degradable polymers has risen, an ever increasing number of manuscripts report the synthesis of copolymers through ring-opening copolymerization techniques. However, the mechanism of copolymerization remains unexplored. ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=911008

20. Synthesis and characterization of model crosslinked polyamide films for water purification
Topic: Advanced Materials
Published: 6/24/2012
Authors: Peter M. Johnson, Edwin P Chan, Jun Y. Chung, Junghyun Lee, Christopher M Stafford
Abstract: Reverse osmosis (RO) and nanofiltration (NF) membranes are comprised of a dense active layer supported by a porous support. Commercial active layer are highly crosslinked polyamides that are formed through interfacial polymerization directly on the s ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=911116



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