US – Page 276 – TechConnect Briefs

Room Temperature Growth of Single Intermetallic Nanostructures on Nanoprobes

Yazdanpanah M.M., Dobrokhotov V.V., Safir A., Pabba S., Rojas D., Cohn R.W., University of Louisville, US

It is possible to grow single crystals directly on nanoprobes, such as atomic force microscope (AFM) probes, tungsten needles and nanotapered glass pipettes. We have grown single Ag2Ga nanoneedles and PtGa6 nanoplates/blades from supersaturated melts [...]

Preparation and characterization of ultrasharp tungsten wires

Kulakov M., Luzinov I., Kornev K., Clemson University, US

The ultrasharp tungsten wires were produced by electrochemical method for electroexplosion of polymers. The effects of electropolishing control parameters, tungsten wire diameter, applied voltage and depth of the wire immersion into electrolyte, on the tip [...]

Attaching Biological Molecules to AFM Probes for Nanoscale Molecular Recognition Studies

Travis Johnson W., Agilent Technologies, US

Atomic Force Microscopy (AFM) is an important tool for nanoscale molecular recognition studies. A strong suit of AFM is its ability to measure hardness/elasticity, nonspecific adhesion, or ligand-receptor interactions at the picoNewton scale. Molecular interactions [...]

Raman Spectroscopy resolution limits overcome with nanoscale thermal analysis for complete Polymer Blend Characterization

Ye J., Reading K., Kjoller K., Shetty R., Anasys Instruments, US

The goal of this work was to characterize a blend PA6 and PET using a combination of Raman Spectroscopy and AFM techniques. The Raman Microscopy Image revealed the general structure of a PA6 and PET [...]

Guided Self-Assembly of Block-Copolymer Nanostructures

Karim A., Berry B.C., Kim H-C, Kim S., Zhang X., Bosse A.W., Lacerda S.H., Yager K.G., Jones R.L., Douglas J.F., Briber R.M., Kim H-C, Kim S., NIST, US

A primary limitation of block copolymer films as templates for next generation electronic or data storage devices is the prohibitively long times required for thermally driven self-assembly and defect annihilation and long range order development. [...]

Applications Developments with the Helium Ion Microscope

Scipioni L., Notte J., Carl Zeiss SMT, Inc., US

The helium ion microscope is offering new windows into nano-scale imaging. Unique sample interaction dynamics allow new types of sample information to be gathered. Some fundamental advantages conferred by probing a surface with a helium [...]

Nanoparticle characterization using light scattering technologies

Xu R., Beckman Coulter, Inc., US

To size smaller particles, dynamic light scattering (DLS) that utilizes time variation of scattered light from suspended particles to obtain their hydrodynamic size distribution is the most popular technology. For measuring turbid samples with particle [...]

Characterization of Different Surfaces Morphology in Heterogeneous Catalyst

Mukherjee R., Palazoglu A., Romagnolia J.A., Louisiana State University, US

Structures and property of surface are very important in different chemical, physical and biological process. The interaction between the reactant molecules (adsorbate) and the surface are important in the performance of the catalyst. Surface with [...]

Quartz Crystal Microbalance with Dissipation Monitoring (QCM-D): Real-Time Characterization of Nano-Scale Interactions at the surfaces

Jaiswal A., Smoukov S., Poggi M., Grzybowski B., Q-Sense, Inc., US

There has been an increasing demand for analytical tools that can quantify the interaction and/or reaction of nano-scale particles, polymers as well as bio-molecules, with various surfaces. In-situ monitoring of structural and dynamic changes of [...]

Polyurethane Nanocomposites Containing NCO-Functionalized Carbon Nanotubes and NCO-Functionalized Nanoclays

Nguyen T., Granier A., Pellegrin B., Celina M., NIST, US

Mechanical property, UV resistance, and oxygen permeation performance of automobile polyurethane (PU) coating containing NCO-functionalized (MWCNTs and nanoclays) have been measured. A novel method was used to functionalize CNTs and nanoclays using a diisocyanate in [...]