Analytical Characterization of Size-Dependent Properties of Larger Aqueous Gold Nanoclusters
| Autor: | Germán Plascencia-Villa, David M. Black, Robert L. Whetten, Borries Demeler, Wendell P. Griffith, Marcos M. Alvarez, Miguel Jose-Yacaman |
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| Rok vydání: | 2016 |
| Předmět: |
Gel electrophoresis
Aqueous solution Chemistry Electrospray ionization Size dependent Analytical chemistry 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials Characterization (materials science) Nanoclusters Analytical Ultracentrifugation General Energy Dynamic light scattering Physical and Theoretical Chemistry 0210 nano-technology |
| Zdroj: | The Journal of Physical Chemistry C. 120:8950-8958 |
| ISSN: | 1932-7455 1932-7447 |
| DOI: | 10.1021/acs.jpcc.6b00448 |
| Popis: | Gold nanoclusters (AuNCs) with well-defined structure and arrangement possess particular physical and functional properties. AuNCs that differ only by less than 1 nm in diameter corresponding to one atomic layer show different structural, optical, and physicochemical properties in a size-dependent mode, making their analytical characterization a challenge. Herein we describe an integrative approach to characterization of larger aqueous AuNC (Au102-pMBA44, Au144pMBA60 and higher) selected by gel electrophoresis (PAGE). We employ UV–vis, dynamic light scattering, and zeta-potential in combination with high-performance analytical techniques such as multiwavelength analytical ultracentrifugation and electrospray ionization mass spectrometry were used to separate aqueous AuNCs and to determine their specific hydrodynamic diameter, partial abundance, molecular weight, and mass/charge ratios when present in a complex mixture of AuNCs containing Au102 (1.6 nm), Au144 (2 nm), and Au288–328 (2.5 nm). Advanced analy... |
| Databáze: | OpenAIRE |
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