electron microscopy – TechConnect Briefs

A Programmable Transmission Electron Detector for Nanomaterials Characterization in a Scanning Electron Microscope

Holm J., Caplins B., Keller R., National Institute of Standards and Technology, US

A new programmable detector for scanning transmission electron microscopy (p-STEM) is described. A digital micromirror array lies at the heart of the detector and serves as a programmable virtual objective aperture. Two sensors, a photomultiplier [...]

Ultra Uniform Colloidal Particles as Nanoscale Reference Materials

Saunders A.E., Garcia D.A., Oldenburg S.J., nanoComposix, Inc., US

The ability to understand and predict the properties of nanomaterials relies on an accurate measurement of their size, shape, number density, and other physical properties. One challenge associated with many measurement techniques is the lack [...]

Probing Nanoscale Composites, Interfaces, and Damage Gradients with In-Situ and Ex-Situ Multiscale Mechanical Methodologies

Mara N.A., Los Alamos National Laboratory, US

This presentation reports on recent findings within the Center for Integrated Nanotechnologies that determine the effects of interfacial structures and damage gradients on mechanical response at length scales varying from nanometers to millimeters. Three focus [...]

Silver coated carbon nanotubes regulate virulence gene expression in Salmonella Typhimurium

Chaudhari A.A., Singh S.R., Pillai S., Alabama State University, US

Silver coated carbon nanotubes (AgCNTs) have several biomedical applications and their antibacterial activity against several multi drug resistant pathogens is well documented. However, the exact molecular mechanism for their antibacterial activity is yet to be [...]

Insight into bacteria: magnetosomes chains under photoemission electron and scanning electron microscopes

Keutner C., von Bohlen A., Berges U., Espeter P., Schneider C.M., Westphal C., TU Dortmund University, DE

Magnetotactic bacteria (MTB) are forming magnetosome chains consisting of greigite or iron oxides. In technological, medical, and environmental applications magnetosomes are considered as perspective material. Among all techniques applied to MTB, two providing spatial, chemical, [...]

A New Type of Carbon Nanostructure Formed Within a Metal-Matrix

Salamanca-Riba L., Herzing A., Mansour A., Hall A., Forrest D.R., LeMieux M., Shugart J., University of Maryland, US

Recent advances in nanomanufacturing have made it possible for large amounts (up to 6 wt.%) of carbon to be incorporated as nanoscale carbon during a reaction process in molten metals. These materials are called “covetics”. [...]

Nanostructured Organogel Networks Self-Assembled from Alkylated Isophthalic Acid and Benzimdizalone Compounds

Makeiff D.A., Carlini R., Xerox Research Center of Canada, CA

Organogel networks from low molecular weight components are a fascinating class of functional nanomaterials, with tremendous potential for a wide variety of commercial applications ranging from medicine, electronics, printing, personal care, and environmental remediation [1]. [...]

Characterization of Catalyst Effect on Carbon Nanopearls

Pacley S., Theodore M., Air Force Research Laboratory, US

This presentation focuses on the effect of the Ni catalyst size on the structure of carbon nanopearls (or carbon spheres). Carbon nanopearls are known to have electronic properties, which make them ideal for cold cathode [...]

Engineered Pigment Nanoparticles: Bottom-up Synthesis, Characterization, and Performance Properties

Carlini R., Makeiff D.A., Allen C.G., Gardner S.J., Paraguay-Delgado F., Malac M., Li P., Xerox Research Centre of Canada, CA

High performance organic nanopigments are an increasingly important class of functional nanomaterials that possess physical properties ranging between molecular and bulk materials. These nanomaterials have been utilized in a variety of important commercial applications including [...]

Preparation, properties and thermal control applications of silica aerogel infiltrated with solid-liquid phase change materials

Xiangfa Z., Hanning X., Jian F., Changrui Z., Yonggang J., HuNan University, CN

In the present work, silica aerogel saturated with erythritol as phase change materials (PCMs) was prepared by melt infiltration. The properties of the composite were determined by scanning electronic microscope (SEM), Fourier transformation infrared spectroscope [...]