gold nanoparticles – Page 6 – TechConnect Briefs

Gold Nanoparticle-Assisted AFM Study of DNA Damage and Repair

Demir E., Ozber N., Kavakli H., Kizilel S., Rumelifeneri Yolu College of Engineering, TR

The purpose of this research is to investigate gold nanoparticles as a potential scaffold for the characterization of DNA damage and repair using atomic force microscopy techniques. The procedure consists of functionalizing the surface of [...]

Biofunctionalization of laser-ablated gold nanoparticles

Riabinina D., Zhang J., Zhang T., Zhang J., Zhang T., Chaker M., Ma D., Tijssen P., Universite du Quebec, CA

For the first time, we investigated the biofunctional activity of gold nanoparticles prepared by nanosecond pulsed laser ablation in liquid media. This method allows the fabrication of gold nanoparticles surrounded by a metastable gold oxide [...]

Synthesis and characterization of Hyaluronan – Gold Nanoparticles: A nanostructured material for biomedical applications

Ramis-Castelltort M., Querol J., Ojea I., Catalan Institute of Nanotechnology (ICN), ES

Hyaluronan (HA) is a glycosaminoglycan with a number of biological roles, such as being a key structural component of extracellular matrix and an important mediator in the leukocyte adhesion and migration. HA is ubiquitous in [...]

Local temperature measurement near remotely heated,ultra-small gold nanoparticles

Gupta A., Denver H., Borca-Tasciuc D-A., Joshi A., Kane R., Hella M., Rensselaer Polytechnic Institute, US

This work presents a novel technique to measure the temperature in the vicinity (~3.5 nm) of a remotely heated, ultra-small gold nanoparticle. The temperature measurement is carried out employing fluorescent thermometry and core/shell CdSe quantum [...]

Nanomaching of Silicon nanoporous Structures by Colloidal Gold Nanoparticle

Zhu J., Bart-Smith H., Begley M.R., Kelly R.G., Zangari G., Reed M.L., University of Virginia, US

We report an efficient method for fabricating nanoporous structures in crystalline silicon, using colloidal gold nanoparticles in HF/H2O2 etchant. Colloidal gold in HF/H2O2 solutions accelerates the etching rate by two orders of magnitude and simultaneously [...]

Mechanical properties under nanoindents in gold nanoparticles reinforced poly(vinyl alcohol) nanocomposite films

Tripathy P., Mishra A., Ram S., Fecht H-J., Indian Institute of Technology, IN

Free standing films of gold nanoparticles reinforced poly(vinyl alcohol) (PVA) nanocomposite are synthesized by a novel chemical method with selective Au-contents varied from 0.1 to 5.0 wt%. The color change in the Au-PVA nanocomposite films [...]

Multifunctional Materials Based on Chitosan, Globular Protein and Gold Nanoparticles

Indrea E., Dreve S., Bratu I., Mihailescu G., Olenic L., Tomoaia G., Tomoaia-Cotisel M., Mocanu A., Horovitz O., Tomoaia-Cotisel M., Babes-Bolyai University of Cluj-Napoca, RO

Our studies are focused on the structure of thin films of chitosan and of globular protein in both the absence and the presence of negatively charged gold nanoparticles. Deacetilated chitosan of high molecular weight and [...]

Enantiospecific adsorption of chiral molecules on chiral Au nanoparticles

Garzon I.L., Lopez-Lozano X., Perez L.A., Universidad Nacional Autonoma de Mexico, MX

Enantioselectivity in gold clusters is investigated by studying the adsorption of a chiral amino acid (cysteine) on a chiral Au55 cluster using density functional calculations. The highest adsorption energies were found when the amino and [...]

Nonlinear Optical Property of Gold nanoparticles/Polymer Hybrid Materials

Dai Q., Zou J., Huo Q., Nanoscience Technology Center, University of Central Florida, US

The ability to control the assembly of nanoparticle building blocks is very important in the development of new nanostructured materials and devices. It is well known that the properties of nanostructured materials are not only [...]

Direct Laser Writing of Microtunnels and Reservoirs on Nanocomposite Materials

Chen H., Liu X., Muthuraman H., Zou J., Wang J., Dai Q., Huo Q., University of Central Florida, US

Using the efficient photon—thermal energy conversion property of gold nanoparticles, a direct laser writing method has been developed for the fabrication of microstructures including microtunnels (see figure), holes, and reservoirs on nanoparticle/polymer composite thin films. [...]