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Near infrared optical absorption of gold nanoparticle aggregates
The reduction of HAuCl4 by Na2S has been reported to produce gold nanoparticles with an optical absorption in the near-infrared along with its characteristic absorption in the visible. The opticalExpand
A technique to compare polythiophene solid-state dye sensitized TiO2 solar cells to liquid junction devices
In this communication, we report on a technique to fabricate solid-state polythiophenebased dye sensitized solar cells (DSSCs) that can be directly compared to analogous liquid junction devices. TheExpand
Anomalous photoluminescence in CdSe quantum-dot solids at high pressure due to nonuniform stress.
In nonuniform stress environments, a pronounced flattening of the photoluminescence enegy is observed above 3 GPa and this effect must be considered when investigating other potentially pressure-mediated phenomena. Expand
Ultrafast structural rearrangements in the MLCT excited state for copper(I) bis-phenanthrolines in solution.
The observed spectral dynamics suggest that a solvent-independent inner-sphere relaxation process is occurring despite the large amplitude motions due to the flattening of the tetrahedral coordinated geometry, providing guidance for future X-ray structural studies on ultrafast time scale, as well as for synthesis toward its applications in solar energy conversion. Expand
Determination of the Surface Effects on Sarin Degradation
While it is well established that the dominant degradation mechanism for the chemical warfare agent, sarin, is hydrolysis via an SN2 mechanism in aqueous environments, the same cannot be said whenExpand
Unique gold nanoparticle aggregates as a highly active surface-enhanced Raman scattering substrate
A unique gold nanoparticle aggregate (GNA) system has been shown to be an excellent substrate for surface-enhanced Raman scattering (SERS) applications. Rhodamine 6G (R6G), a common molecule used forExpand
Fluorescence probing of interior, interfacial, and exterior regions in solution aggregates of poly(ethylene oxide)- poly(propylene oxide)-poly(ethylene oxide) triblock copolymers.
This multiple fluorescence probe methodology will be straightforward to apply in general to problems in polymer and biopolymer aggregates, especially those that display strong hydrophobic effects. Expand
Microviscosity in multiple regions of complex aqueous solutions of poly(ethylene oxide)-poly(propylene oxide)-poly(ethylene oxide).
Three different coumarin dyes were chosen based on their hydrophobicity so that different aggregate regions could be probed independently and fluorescence anisotropy experiments provide detailed information on the local microviscosity. Expand
Experimental and TD-DFT study of optical absorption of six explosive molecules: RDX, HMX, PETN, TNT, TATP, and HMTD.
The results suggest optimization approaches for fluorescence based detection methods for these explosives by guiding materials selections for optimal band alignment between fluorescent probe and explosive analyte. Expand
Ultrafast electronic relaxation and coherent vibrational oscillation of strongly coupled gold nanoparticle aggregates.
Persistent spectral hole burning was performed and yielded a hole in the nanoparticle aggregate's extended plasmon band, further supporting that the near-IR band is composed of absorption subbands from differently sized/structured aggregates. Expand