title: Laser-induced temperature jump electrochemistry on gold nanoparticle-coated electrodes.
abstract: Laser-induced temperature jumps (LITJs) at gold nanoparticle-coated indium tin oxide (ITO) electrodes in contact with electrolyte solutions have been measured using temperature-sensitive redox probes and an infrared charge-coupled device. Upon irradiation with 532 nm light, interfacial temperature changes of ca. 20 degrees C were recorded for particle coverages of ca. 1 x 1010 cm-2. In the presence of a redox molecule, LITJ yields open-circuit photovoltages and photocurrents that are proportional to the number of particles on the surface. When ssDNA was used to chemisorb nanoparticles to the ITO surface, solution concentrations as low as 100 fM of target ssDNA-modified nanoparticles could be detected at the electrode surface.
authors: Department of Chemistry, North Carolina State University, Raleigh, NC 27695, USA.
authors: Lisa B
authors: LB
authors: Lowe
authors: Scott H
authors: SH
authors: Brewer
authors: Stephan
authors: S
authors: Krämer
authors: Ryan R
authors: RR
authors: Fuierer
authors: Guoguang
authors: G
authors: Qian
authors: Chiamaka O
authors: CO
authors: Agbasi-Porter
authors: Selina
authors: S
authors: Moses
authors: Stefan
authors: S
authors: Franzen
authors: Daniel L
authors: DL
authors: Feldheim
mesh_terms: D004277:DNA, Single-Stranded / Q000032:analysis / Q000737:chemistry*; D004563:Electrochemistry / Q000379:methods*; D004566:Electrodes; D006046:Gold / Q000737:chemistry*; D007204:Indium / Q000737:chemistry; D007834:Lasers; D036103:Nanotechnology; D010316:Particle Size; D020349:Surface Plasmon Resonance; D013696:Temperature; D013817:Thermography / Q000379:methods
chemical_list: D004277:DNA, Single-Stranded; D007204:Indium; C047711:indium oxide; D006046:Gold