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Topic Area: Nanotechnology

Displaying records 281 to 290 of 387 records.
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281. 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

282. 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

283. 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

284. 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

285. 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

286. 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

287. 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

288. 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

289. Semiconductor Nanocrystal Probes for Human Metaphase Chromosomes
Topic: Nanotechnology
Published: 2/1/2004
Authors: Yan Xiao, Peter E. Dr. Barker
Abstract: Novel inorganic fluorophores called semiconductor nanocrystals have recently been incorporated into protein, antibody and microbead oligonucleotide detection methods where previously, organic dyes were universally employed. To improve quantitation o ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=830407

290. Nanometrology - FY 2003 Program and Selected Accomplishments
Series: NIST Interagency/Internal Report (NISTIR)
Topic: Nanotechnology
Published: 12/15/2003
Authors: C M Allocca, Stephen Weil Freiman
Abstract: The emphasis on nanotechnology around the world is leading to the development and commercialization of unique products based upon significantly smaller devices and material ensembles. Materials at the nanoscale in three dimensions (NEMS, MEMS), two ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=850109



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