Reversible Tuning of Silver Quantum Dot Monolayers Through the Metal-Insulator Transition

Abstract

The linear and nonlinear (χ (2) ) optical responses of Langmuir monolayers of organically functionalized silver quantum dots were measured as a continuous function of interparticle separation under near-ambient conditions. As the distance between metal surfaces was decreased from 12 to ∼5 angstroms, both quantum and classical effects were observed in the optical signals. When the separation was less than 5 angstroms, the optical second-harmonic generation (SHG) response exhibited a sharp discontinuity, and the linear reflectance and absorbance began to resemble those of a thin metallic film, indicating that an insulator-to-metal transition occurred. This transition was reversible.

Keywords

MonolayerQuantum dotAbsorbanceSecond-harmonic generationMaterials scienceAngstromDiscontinuity (linguistics)MetalTransition metalCondensed matter physicsNonlinear opticalMolecular physicsOptoelectronicsChemical physicsNonlinear systemOpticsNanotechnologyChemistryCrystallographyPhysicsQuantum mechanics

Affiliated Institutions

University of California, Berkeley US

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Publication Info

Year: 1997
Type: article
Volume: 277
Issue: 5334
Pages: 1978-1981
Citations: 862
Access: Closed

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APA Style

                            
                                
                                    C. Patrick Collier, 
                                
                                    Richard J. Saykally, 
                                
                                    J. J. Shiang
                                
                                et al.
                            
                            (1997). 
                            Reversible Tuning of Silver Quantum Dot Monolayers Through the Metal-Insulator Transition. 
                            Science
                            , 277
                            (5334)
                            , 1978-1981.
                            https://doi.org/10.1126/science.277.5334.1978
                        

Identifiers

DOI: 10.1126/science.277.5334.1978