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Displaying records 291 to 300 of 402 records.
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291. Quantitative Measurements of the Size Scaling of Linear and Circular DNA in Nanofluidic Slitlike Confinement
Topic: Nanotechnology
Published: 2/14/2012
Authors: Elizabeth A Strychalski, Jon C Geist, Michael Gaitan, Laurie E Locascio, Samuel M Stavis
Abstract: Quantitative size measurements of single linear and circular DNA molecules in nanofluidic slitlike confinement are reported. A novel experimental method using DNA entropophoresis down a nanofluidic staircase implemented comprehensive variation of sl ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=908052

292. Quantitative secondary ion mass spectrometry imaging of self-assembled monolayer films for electron beam dose mapping in the environmental scanning electron microscope
Topic: Nanotechnology
Published: 7/1/1998
Authors: John G Gillen, Scott A Wight, David S. Bright, T M. Herne
Abstract: Fluorinated alkanethiol self assembled monolayers (SAM) films immobilized on gold substrates have been used as electron-sensitive resists to map quantitatively the spatial distribution of the primary electron beam scattering in an environmental scann ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=831060

293. Quantum Dot Dissemination and Behavior in Bacterial Biofilms
Topic: Nanotechnology
Published: 5/7/2006
Authors: Jayne B Morrow, Richard D Holbrook, Cynthia J Zeissler
Abstract: Quantum dots (QDs) are colloidal semiconductor nanocrystals that photoluminescence emission is proportional to the dot size and have been utilized in fluorescent imaging in biological systems. Biofilms are communities of microorganisms attached to su ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=902126

294. RAPID INSPECTION OF CARBON NANOTUBE QUALITY
Topic: Nanotechnology
Published: 7/1/2007
Authors: Stephanie A Hooker, Roy Howard Geiss, Aparna Kar
Abstract: Carbon nanotubes have unique properties of interest for applications in aerospace, electronics, and biotechnology. However, the properties of different batches of carbon nanotubes can vary considerably depending on chemical purity and the nanotube ty ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=50489

295. Radioactive Particle Analysis by Digital Autoradiography
Topic: Nanotechnology
Published: 5/1/2001
Authors: Cynthia J Zeissler, Richard Mark Lindstrom, J P McKinley
Abstract: We have been exploring ways to evaluate the activity of radioactive particles that have been detected by phosphor plate digital autoradiography based on photostimulated luminescence (PSL). A PSL system with 25{mu} pixel digitization has been applied ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=831184

296. Reaction Mechanism Governing the Formation of 1,3-bis(diphenylphosphino)propane-protected Gold Nanoclusters
Topic: Nanotechnology
Published: 9/19/2011
Authors: Jeffrey W Hudgens, John M Pettibone, Thomas P Senftle, Ryan N. Bratton
Abstract: This report outlines the determination of a reaction mechanism that can be manipulated to develop directed syntheses of gold monolayer protected clusters (MPCs) prepared by the reduction of solutions containing 1,3-bis(diphenylphosphino)propane (L^u3 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=909874

297. Reaction Network Governing Diphosphine-Protected Gold Nanocluster Formation from Nascent Cationic Platforms
Topic: Nanotechnology
Published: 2/16/2012
Authors: John M Pettibone, Jeffrey W Hudgens
Abstract: We identify the reaction network governing gold monolayer protected cluster (MPC) formation during the reduction of Au(PPh^d3^)Cl and L^u5^ (L^u5^ = 1,5-bis(diphenylphosphino)pentane) in solutions. UV-vis spectroscopy and electrospray ionization mass ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=909879

298. Real-Time Size Discrimination and Elemental Analysis of Gold Nanoparticles using ES-DMA coupled to ICP-MS
Topic: Nanotechnology
Published: 1/22/2013
Authors: Sherrie R. Elzey, De-Hao D. Tsai, Lee Lijian Yu, Michael R Winchester, Michael E Kelley, Vincent A Hackley
Abstract: We report the development of a hyphenated instrument with the capacity to quantitatively characterize aqueous suspended gold nanoparticles (AuNPs) based on a combination of gas-phase size separation, particle counting, and elemental analysis. A custo ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=912171

299. Recent Progress in Understanding the Imaging and Metrology using the Helium Ion Microscope
Topic: Nanotechnology
Published: 9/1/2009
Authors: Michael T Postek, Andras Vladar, Bin Ming
Abstract: Nanotechnology is pushing imaging and measurement instrument technology to high levels of required performance. As this continues, new barriers confronting innovation in this field are encountered. Particle beam instrument resolution remains one of t ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=902762

300. Rectangular Scale-Similar Etch Pits in Monocrystalline Diamond
Topic: Nanotechnology
Published: 9/15/2011
Authors: Craig Dyer McGray, Richard A Allen, Marc J Cangemi, Jon C Geist
Abstract: Etching of monocrystalline diamond in oxygen and water vapor at 1100° C through small pores in a silicon nitride film produced smooth-walled rectangular cavities. The cavities were imaged by electron microscope and measured by interferometric microsc ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=908075



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