Papers – Page 51 – TechConnect Briefs

In-Situ Nanomechanical-Electrical Testing of One-Dimensional Materials

Yassar R.S., Yap Y.K., Michigan Technological University, US

One-dimensional nanomaterials including nanotubes are building blocks for constructing various complex nanodevices. Boron nitride (BN) nanotubes with structure similar to carbon nanotube are known to be among the strongest insulators in the world. In this [...]

Quantifying and enforcing the two-dimensional symmetry of scanning probe microscopy images of periodic objects

Moeck P., Moon Jr. B., Sánchez E., Abdel-Hafiez M., Hietschold M., Portland State University, US

The defining features of a scanning probe microscope are a very fine probe that is scanned in two dimensions (2D), in very fine steps, very close to the surface of a sample, and a probe-sample [...]

High Resolution Surface Imaging Using a Carbon Nanotube Array with Pointed Height Distribution

Roy Mahapatra D., Anand S.V., Sinha N., Melnik R.V.N., Massachusetts Institute of Technology, US

In this paper, we discuss a new methodology to obtain high resolution electron micrographs of different materials using field emission from a pointed array of carbon nanotubes (CNTs) and a technique to map the surface [...]

Characterization of graphene segregated on Ni

Yu Q., Lian J., Chen Y-P, Li H., Lian J., Pei S-S, University of Houston, US

We report a surface segregation approach to synthesize high quality graphenes on Ni under ambient pressure. Graphenes were segregated from Ni surfaces by carbon dissolving at high temperature and cooling down with various cooling rates. [...]

Complex Permittivity Measurements of Single-walled Carbon Nanotubes at Microwave Frequencies

Darne C., Xie L-M, Wosik J., Wosik W., Wosik J., Wosik W., University of Houston, US

In this work we have used a novel method for characterization of complex permittivity for nanotubes over the microwave frequencies. It uses dielectric resonance method and cavity pertrubation technique for extracting the complex permittivities of [...]

Fabrication of QD structures showing diode characteristics for electroluminescence (EL) and other applications

AlAmoody F., Rodriguez A., Papadimitrakopoulos F., Huang W., Ayers J., Jain F., University of Connecticut, US

The abstract talks about the estimation of the size of the cladded dots which are then used in fabrication of a diode like structure. It also talks about the nucleation of the dots with varying [...]

Enhanced oscillator strengths and optical parameters of doped ZnS bulk and nanophosphors

Sharma R., Kyhm K., Bhatti H.S., Pusan National University, KR

We synthesized, characterized, and investigated the oscillator-strength (OS), dipole-moment (DM) and integrated cross-section values (ICSVs) of singly (Mn) and doubly (Mn and Co or Ni) doped samples of ZnS bulk and nanophosphors. Although ZnS doped [...]

Synthesis and Characterization of Metastable Nanocrystalline Cobalt

Osorio-Cantillo C., Perales-Perez O., University of Puerto Rico, US

Applications of elemental cobalt are consequence of its phase-dependent magnetic properties; the anisotropic high-coercivity hcp-Co phase is preferred for permanent magnet applications, while the more symmetric low coercivity fcc- and, pseudo-cubic epsilon-Co can be used [...]

Order Development in Polymer-Clay Nanocomposites: from Aqueous Gels to Multilayered Films

Stefanescu C., Stefanescu E.A., Stefanescu C., Stefanescu E.A., Daly W.H., Negulescu I.I., Virginia Commonwealth University, US

When passing a material through a semihyperbolic convergent die in an elongational rheometer, high degrees of order are induced in the material, and the entropy changes, indicative of orientation, can be calculated. The aim of [...]

Scanning Probe Charge Reading of Ferroelectric Polarization with Nanoscale Resolution

Kim B.M., Adams D.E., Tran Q., Ma Q., Rao V., Nanochip, Inc., US

Probe storage with epitaxial ferroelectric PbZr0.2Ti0.8O3 (PZT) media [1, 2] is a promising technology for terabyte/inch2 storage devices because nanoscale and nonvolatile polarizations may be reversibly written and read by a scanning probe tip. Piezoresponse [...]