US – Page 291 – TechConnect Briefs

400-900 nm Light Emitting Silicon Nanoparticles

Liptak R.W., Pi X.D., Kortshagen U., Campbell S.A., University of Minnesota, US

A novel process has been developed to create an aerosol of passivated silicon nanoparticles that emit controlled colors from blue to the near IR. The emission is stable in air. This is the first ever [...]

Grain Size Distribution in CoCrPtO-Based Perpendicular Magnetic Recording Media

Hossein-Babaei F., Kwon U., Sinclair R., Stanford University, US

A multilayer disk structure based on a CoCrPtO magnetic layer is one of the material choices for fabrication of perpendicular magnetic recording media. In these devices, nano-sized (typically ~10 nm in diameter), magnetically hard cobalt-rich [...]

Influence of Stress and Temperature on the Microstructure Stability of Nanocrystalline Materials

Rajgarhia R.K., Koh S-W., Spearot D., Saxena A., Selvam P., Tummala R., University of Arkansas, Fayetteville, US

Nanocrystalline materials have improved mechanical and electrical properties in comparison to their microcrystalline counterparts due to their reduced crystallite or grain size. Loss of these unique properties due to grain growth under the affect of [...]

Development of Nanostructures, Nanodevices, Nanocomposites, and Hierarchical Nanocomposites at Hawaii Nanotechnology Laboratory

Ghasemi-Nejhad M., Cao A., University of Hawaii at Manoa, US

This paper presents activities related to the development of nanostructures, nanodevices, nanocomposites, and hierarchical nanocomposites at the Hawaii Nanotechnology Laboratory of the Department of Mechanical Engineering of the University of Hawaii at Manoa. On nanostructures, [...]

Parylene Nanospheres, Nanotubes & Nanocoatings for Medical and Electronics Applications

Kumar R., Greiner A., Specialty Coating Systems, US

This paper describes the methods to obtain Parylene hollow nanospheres and nanotubes, and their potential applications along with application of Parylene coatings on nanostructured substrates for functionality and reliability enhancement. Various types of spheres and [...]

Monolayer to Multilayers Nanostructural Evolution in N type Oligothiphenes: Implications for OFET Performance

Dholakia G.R., Facchetti A., Marks T.J., ELORET NASA Ames Research Center, US

This study elucidates the nature of the interface between the organic semiconductor and source-drain electrodes in OFET devices. The pitted and disordered monolayer results in poor mobilities for bottom contact OFETs. Reorientation of the molecules [...]

Electroluminescence of ZnO Nanowire/p-GaN Heterojunction Light Emitting Diodes

Wang X., Cole J.J., Jacobs H.O., University of Minnesota, US

ZnO nanowire/p-GaN heterojunction light emitting diodes (LEDs) were fabricated by growing ZnO nanowire vertical arrays in aqueous solution on Mg-doped p-GaN films. Diode-like, rectifying I-V characteristics were recorded at room temperature and a “current crowding” [...]

Electroluminescence from Surface Oxidized Silicon Nanoparticles Randomly Dispersed within a Polymer Matrix

Ligman R.K., Mangolini L., Kortshagen U., Campbell S.A., University of Minnesota, US

For the first time we have demonstrated hybrid silicon organic light emitting diodes. This process uses particles created in a nonthermal silane plasma which are treated by photo oxidation to passivate the surface. Particles were [...]

Title: Nano/micro-structures formation driven by local protonation of polymer thin films via dip-pen nanolithography

Maedler C., Chada S., La Rosa A., Yan M., Portland State University, US

SUMMARY Nanostructures are created by stimulating the mechanical response of polymer materials upon confining protonation reaction locally via dip-pen. ABSTRACT While dip-pen nanolithography uses a sharp tip to anchor molecules on the substrate to form [...]

Responsive Hydrogels as Model Materials to Study the Deformation Behavior of Patterned Polymer Nanostructures

Tirumala V.R., Stafford C.M., Huang R., Lin E.K., Ocola L.E., National Institute of Standards and Technology, US

The mechanical stability of polymer nanolines is crucial to the success of semiconductor device fabrication. Recent experimental and modeling studies have focused on the influence of processing conditions on the stability of densely patterned lines. [...]