Tunable spectroscopic enhancement via transformation of electroless plating into metal films with predictably adjustable optical features
AssigneeUniversity of Utah
InventorsDonald Keith Roper, Wonmi Ahn, Benjamin Jeppson Taylor, Analia G. Dall' Asen
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Abstract
A plurality of gold nanoparticles disposed on a surface of a substrate includes nanoparticles having an average particle density greater than 1.8×1011 particles per squared centimeter of the surface. The gold nanoparticles include a monomodal diameter distribution and an average diameter capable of being arbitrarily controlled between about 5 nm to about 300 nm. The surface may be a three-dimensional surface or an internal surface.
Claims27
A method of making nanoparticles, comprising:
- providing a substrate comprising a tin-sensitized surface;
- forming an island film by reduction of metal ions onto the tin-sensitized surface;
- and
- annealing the island film to form the nanoparticles.
A method of making nanoparticles, comprising:
- performing electroless plating in a solution comprising a nanoparticle precursor to form an island film on a surface;
- and
- annealing the island film to form the nanoparticles, wherein an average diameter of the nanoparticles is capable of being arbitrarily controlled during processing from about 5 nm to about 300 nm.
A plurality of gold nanoparticles disposed on a surface of a substrate, comprising an average particle density greater than 1.8×1011 particles per squared centimeter of the surface.
A method of using a sensor, comprising:
- providing a solution containing at least one analyte onto a surface, wherein the surface comprises a plurality of nanoparticles comprising an average particle density greater than 1.8×1011 particles per squared centimeter of the surface;
- and
- monitoring for a spectroscopic signal change in at least one of surface plasmon resonance or surface-enhanced Raman scattering of the surface, wherein the spectroscopic signal change is based on immobilization of the analyte on at least one of the nanoparticles.
Dependencies are inferred from the claim text.