Kinetic Control of Interparticle Spacing in Au Colloid-Based Surfaces: Rational Nanometer-Scale Architecture
| Autor: | Jennifer A. Davis, and Andrea P. Guthrie, Michael A. Jackson, Katherine C. Grabar, Michael J. Natan, Patrick C. Smith, Daniel G. Walter, Michael D. Musick |
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| Rok vydání: | 1996 |
| Předmět: | |
| Zdroj: | Journal of the American Chemical Society. 118:1148-1153 |
| ISSN: | 1520-5126 0002-7863 |
| DOI: | 10.1021/ja952233+ |
| Popis: | This paper details the kinetic aspects of covalent self-assembly of colloidal Au particles from solution onto immobilized organosilane polymers. On glass substrates, surface formation can be monitored using UV−vis spectroscopy and field emission scanning electron microscopy (FE-SEM). Correlation of these data allows the effect of nanostructure on bulk optical properties to be evaluated. At short derivatization times, particle coverage is proportional to (time)1/2. The particle sticking probability p, defined as the ratio of bound particles to the number of particles reaching the surface in a given time period, can be determined from a knowledge of the particle radius, solution concentration, temperature, and solution viscosity; for surfaces derivatized with (3-mercaptopropyl)trimethoxysilane (MPTMS), p ≈ 1. At longer derivatization times, interparticle repulsions result in a “saturation” coverage at ≈30% of a close-packed monolayer. Two approaches for modulating the rate of surface formation are described... |
| Databáze: | OpenAIRE |
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