Controlling inter-nanoparticle coupling by wrinkle-assisted assembly

Controlling Plasmon Coupling in Biomolecule-Linked Metal Nanoparticle Assemblies

Controlling Plasmon Coupling in Biomolecule-Linked Metal Nanoparticle Assemblies by David S. Sebba Department of Mechanical Engineering Materials Science Duke University Date:_______________________ Approved: ___________________________ Anne A. Lazarides, Supervisor ___________________________ Thomas H. LaBean ___________________________ David R. Smith ___________________________ Chris Dwyer __...

metal nanoparticle production assisted by α-amylase

Light-assisted, templated self-assembly of gold nanoparticle chains.

We experimentally demonstrate the technique of light-assisted, templated self-assembly (LATS) to trap and assemble 200 nm diameter gold nanoparticles. We excite a guided-resonance mode of a photonic-crystal slab with 1.55 μm laser light to create an array of optical traps. Unlike our previous demonstration of LATS with polystyrene particles, we find that the interparticle interactions play a si...

Collective and individual plasmon resonances in nanoparticle films obtained by spin-assisted layer-by-layer assembly.

Nanoscale uniform films containing gold nanoparticle and polyelectrolyte multilayer structures were fabricated by the using spin-assembly or spin-assisted layer-by-layer (SA-LbL) deposition technique. These SA-LbL films with a general formula [Au/(PAH-PSS)nPAH]m possessed a well-organized microstructure with uniform surface morphology and high surface quality at a large scale (tens of micromete...

Optically anisotropic substrates via wrinkle-assisted convective assembly of gold nanorods on macroscopic areas

We demonstrate the large-scale organisation of anisotropic nanoparticles into linear assemblies displaying optical anisotropy on macroscopic areas. Monodisperse gold nanorods with a hydrophilic protein shell are arranged by dip-coating on wrinkled surfaces and subsequently transferred to indium tin oxide (ITO) substrates by capillary transfer printing. We elucidate how tuning the wrinkle amplit...