			Home About us Contact

Gold Nanoparticle Arrays (gold + nanoparticle_array)

Distribution by Scientific Domains

Chemistry	50%

Selected Abstracts

Preparation of Nanogapped Gold Nanoparticle Array for DNA Detection

ELECTROANALYSIS, Issue 4 2008
Shiho Tokonami
Abstract A novel DNA detection technique using a gold nanoparticle array film electrode has been reported here. The gold nanoparticles molecularly linked with binder molecule (1,10-decanedithiol) were separated 1.3,nm from each other, and the DNA conductivity change from single to double strand was measured by monitoring a voltage drop across the particles, between which a probe of a 12-mer oligonucleotide was immobilized. In adding a complementary oligonucleotide on the nanoparticle film chip, an immediate decrease in the film resistance (ca. 1.4 ,) due to a hybridization event occurred in a reproducible manner with this simple setup. In the paper, we have an interest in the primary sensing properties; effect of the film resistance on the sensor response, dependence of the resistance change on the DNA concentration, and the performance of the system for DNA detection including single nucleotide polymorphisms were described. [source]

DNA-Wrapped Single Walled Carbon Nanotubes as Rigid Templates for Assembling Linear Gold Nanoparticle Arrays,

ADVANCED MATERIALS, Issue 11 2007
X. Han
Nanotube templates assembly: Water-soluble conjugates between gold nanoparticles and DNA-wrapped single-walled carbon nanotubes (SWNTs), as shown in the figure, are constructed based on a self-assembly strategy that does not require any chemical modifications to the sidewalls of the SWNTs, which minimizes the possibility of changes to their structure and properties. The success of assembling Au nanoparticles (AuNPs) onto SWNTs paves a way for further decoration of AuNPs on SWNTs to achieve multifunctionalities. [source]

One-Dimensional Gold Nanoparticle Arrays by Electrostatically Directed Organization Using Polypeptide Self-Assembly,

ANGEWANDTE CHEMIE, Issue 38 2009
Nikhil Sharma
In Reih und Glied: Die einzigartige molekulare Architektur eines selbstorganisierten Polypeptidtemplats ermöglicht das elektrostatische Abscheiden von Nanopartikeln mit einheitlichem Partikelabstand. Die hierarchisch ablaufende Selbstorganisation des Polypeptids führt zu einer periodischen Anordnung geladener Flecken entlang der Fibrillenarchitektur (siehe Bild). [source]

Plasmonic modes of gold nano-particle arrays on thin gold films

PHYSICA STATUS SOLIDI - RAPID RESEARCH LETTERS, Issue 10 2010
A. Hohenau
Abstract Regular arrays of metal nanoparticles on metal films have tuneable optical resonances that can be applied for surface enhanced Raman scattering or biosensing. With the aim of developing more surface selective geometries we investigate regular gold nanoparticle arrays on 25 nm thick gold films, which allow to excite asymmetric surface plasmon modes featuring a much better field confinement compared to the symmetric modes used in conventional surface plasmon resonance setups. By optical extinction spectroscopy we identify the plasmonic modes sustained by our structures. Furthermore, the role of thermal treatment of the metal structures is investigated, revealing the role of modifications in the crystalline structure of gold on the optical properties. (© 2010 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim) [source]