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Topic Area: Nanotechnology

Displaying records 281 to 290 of 389 records.
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281. Polycyclic Aromatic Hydrocarbons in Flames, in Diesel Fuels, and in Diesel Emissions
Topic: Nanotechnology
Published: 1/1/2005
Authors: Robert A Fletcher, R Dobbins, Bruce A Benner Jr, S Hoeft
Abstract: Diesel fuels and emissions are composed of numerous hydrocarbon species. Combustion generated or pyrogenic polycyclic aromatic hydrocarbons (PAHs) derived from premixed and diffusion flames often consists of the most stable benzenoid PAHs. In contra ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=831342

282. Nanoscale Elastic-Property Mapping with Contact-Resonance-Frequency AFM
Topic: Nanotechnology
Published: 12/31/2004
Authors: Donna C. Hurley, Tony B. Kos, Paul Rice
Abstract: We describe dynamic atomic force microscopy (AFM) techniques to map the nanoscale elastic properties of surfaces, thin films, and nanostructures. Our approach is based on atomic force acoustic microscopy (AFAM) methods that have previously been used ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=30030

283. Standardization of Isotope Ratio Measurements for Doping Control
Topic: Nanotechnology
Published: 12/1/2004
Author: R Michael Verkouteren
Abstract: Pharmaceutical steroids are known to differ in isotopic composition from those produced naturally in the body. By measuring the ^u13^ C/^u12^C ratio of specific steroids deteched in urine, the technique of Gas Chromatography-Combustion-Isotope Rati ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=831328

284. Maximum Pixel Spectrum: A New Tool For Detecting And Recovering Rare, Unanticipated Features From Spectrum Image Data Cubes
Topic: Nanotechnology
Published: 11/1/2004
Authors: David S. Bright, Dale E Newbury
Abstract: A new software tool, the Maximum Pixel Spectrum detects rare events within a spectrum image data cube, such as that generated with electron-excited energy dispersive x-ray spectrometry (EDS) in a scanning electron microscope. The Maximum Pixel Spect ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=831464

285. Dynamic behavior of dagger-shaped atomic force microscope cantilevers
Topic: Nanotechnology
Published: 10/20/2004
Authors: K Shen, Donna C. Hurley, J Turner
Abstract: Experimental techniques based on the atomic force microscope (AFM) have been developed for characterizing mechanical properties at the nanoscale and applied to a variety of materials and structures. Atomic force acoustic microscopy (AFAM) is one such ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=50027

286. Automated Analysis of Organic Particles Using Cluster SIMS
Topic: Nanotechnology
Published: 6/1/2004
Authors: John G Gillen, Cynthia J Zeissler, Christine M. Mahoney, Abigail P. Lindstrom, Robert A Fletcher, P Chi, Jennifer R Verkouteren, David S. Bright, R Lareau, M Boldman
Abstract: Cluster primary ion bombardment combined with secondary ion imaging is used in an ion microscope secondary ion mass spectrometer for the spatially resolved analysis of organic particles on various surfaces. Compared to the use of monoatomic primary ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=831316

287. Depth Profiling of 4-Acetamindophenol-Doped Poly(lactic acid) Films Using Cluster Secondary Ion Mass Spectrometry
Topic: Nanotechnology
Published: 6/1/2004
Authors: Christine M. Mahoney, S V. Roberson, John G Gillen
Abstract: The feasibility of cluster Secondary Ion Mass Spectrometry (SIMS) for depth profiling of drug delivery systems is explored. Behaviors of various biodegradable polymer films under dynamic SF^d5^^u+^ primary ion bombardment was investigated including s ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=831329

288. Dynamic SIMS Utilizing SF^d5^^u+^ Polyatomic Primary Ion Beams for Drug Delivery Applications
Topic: Nanotechnology
Published: 6/1/2004
Authors: Christine M. Mahoney, S V. Roberson, John G Gillen
Abstract: The behavior of various biodegradable polymer films (e.g. polylactic acid, polyglycolic acid and polycaprolactone) as well as some model drugs (theophylline and 4-acetamidophenol) under dynamic SF^d5^^u+^ primary ion bombardment is explored. A serie ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=831312

289. Relative humidity effects on the determination of elastic properties with atomic force acoustic microscopy
Topic: Nanotechnology
Published: 3/1/2004
Authors: Donna C. Hurley, J Turner
Abstract: We have investigated how ambient humidity can affect quantitative measurements of elastic properties on the nanoscale. Using an emerging technique called atomic force acoustic microscopy (AFAM), two samples were examined: a thin film of fluorosilica ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=851341

290. Membrane Surface Dynamics of DNA-Threaded Nanopores Revealed by Simultaneous Single-Molecule Optical and Ensemble Electrical Recording
Topic: Nanotechnology
Published: 2/3/2004
Authors: E L Chandler, A L Smith, Lisa K Burden, John J Kasianowicz, D L Burden
Abstract: We demonstrate a method for simultaneous real-time electrical and single-molecule optical recordings of the interactions between single-stranded DNA and nanoscopic pores in planar lipid membranes. Electrophysiological techniques are used to measure ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=830405



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