The coordination chemistry of gold surfaces: Formation and far-infrared spectra of alkanethiolate-capped gold nanoparticles

Petroski, Janet M.; Chou, Mei H.; Creutz, Carol

doi:10.1016/j.jorganchem.2008.11.057

Cited by 55 publications

(80 citation statements)

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“…As discussed above, the coordinate bond could actually form between the -SH group and gold surface in the initial stage, followed by the dissociation of S-H bond that results in a thiyl radical, which would finally form a gold-thiolate covalent bond at the gold-sulfur interface [45][46][47][48][49][50][51][54][55][56][57][58] . These findings indicate that the formation of Au-S covalent bonds needs a certain time to complete.…”

Section: Resultsmentioning

confidence: 97%

Quantifying thiol–gold interactions towards the efficient strength control

et al. 2014

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The strength of the thiol-gold interactions provides the basis to fabricate robust self-assembled monolayers for diverse applications. Investigation on the stability of thiol-gold interactions has thus become a hot topic. Here we use atomic force microscopy to quantify the stability of individual thiol-gold contacts formed both by isolated single thiols and in self-assembled monolayers on gold surface. Our results show that the oxidized gold surface can enhance greatly the stability of gold-thiol contacts. In addition, the shift of binding modes from a coordinate bond to a covalent bond with the change in environmental pH and interaction time has been observed experimentally. Furthermore, isolated thiol-gold contact is found to be more stable than that in self-assembled monolayers. Our findings revealed mechanisms to control the strength of thiol-gold contacts and will help guide the design of thiol-gold contacts for a variety of practical applications.

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Section: Resultsmentioning

confidence: 97%

Quantifying thiol–gold interactions towards the efficient strength control

et al. 2014

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“…In the latter case, the 5 nm particles, since no X-ray crystal structures have been possible to obtain, the evidence for thiolate [RS¯] vs RSH as the capping ligand has not been as clear. 29 However, based on the recent evidence of Creutz and co-workers, 30 when surfactant stabilized gold nanoparticles were allowed to react with thiols, a substantial portion, though not quantitative, of hydrogen gas was released. Inspired by the Creutz work and by years of uncertainty of what actually happens to the hydrogen in gold-thiol reactions, a series of SMAD experiments were carried out.…”

Section: B Inverse Micelle Methods 28mentioning

confidence: 99%

Size Focusing of Nanoparticles by Thermodynamic Control through Ligand Interactions. Molecular Clusters Compared with Nanoparticles of Metals

Jose¹,

Matthiesen

Parsons

et al. 2012

J. Phys. Chem. Lett.

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Ligand-capped metal entities come in two sizes, (1) molecular clusters of 10–200 metal atoms and (2) nanoparticles of 2000–10000 metal atoms. In numerous cases, certain “magic sizes” have been found to be most accessible and stable, clusters of 25, 38, 55, and 102 atoms and nanoparticles of 3500–5000 atoms or 4–5 nm. The most familiar and studied system is that of gold (metal) and thiol (ligand). Herein, the methods of synthesis of these gold clusters versus gold nanoparticles are carefully compared. In the cluster case, an important intermediate is the (Au+SR–) n polymer, which is not the case in the synthesis of nanoparticles either from metal (vapor) atoms or metal ions. Also, it is shown that thiol can act as both a reductant (Au3+ → Au+) and as an oxidant (Au0 → Au+). The thermodynamic forces responsible for the favored formation of certain size clusters and nanoparticles are discussed.

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“…A escolha da molécula de metanotiol (SCH 4 ) está relacionada com a presença dos seus átomos (C, S e H) em estruturas orgânicas de interesse biológico que são adsorvidas em superfícies e em nanopartículas metálicas [91,101,102].…”

Section: Propriedades Eletrônicas Das Nanopartículas Puras E Core-shellunclassified

“…Tabela B.1: Parâmetro de rede, a 0 , em Angstrom (Å), (bulk-modulus) (BM) em Megabars (MBAR) e energia de coesão, E , em eV, do cristal de prata (Ag). Esses parâmetros de rede, tabelados em B.1 são cerca de 2% maiores do que o valor experimental 4,09 Å [82,85,86,101,103]. Estes cálculos foram efetuados, tanto para a prata(Ag) quanto para o ouro(Au), com a célula unitária da estrutura cúbica de face centrada utilizando uma malha de (12x12x12) pontos especiais para o mapeamento da primeira zona de Brillouin (1ªZB).…”

Section: Apêndice Bunclassified

“…Tabela B.2: Parâmetro de rede, a 0 , em Angstrom(Å), (bulk-modulus)(BM) em Megabars(MBAR) e energia de coesão, E , em eV, do cristal de ouro(Au). Esses parâmetros de rede, tabelados em B.2 são cerca de 0,7%, no caso com correção de van der Waals, e 2,5%, no caso sem a mesma correção, maiores do que o valor experimental 4,08 Å [82,85,86,101,103].…”

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Propriedades estruturais e eletrônicas das nanopartículas puras e core-shell de prata e de ouro

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The coordination chemistry of gold surfaces: Formation and far-infrared spectra of alkanethiolate-capped gold nanoparticles

Cited by 55 publications

References 55 publications

Quantifying thiol–gold interactions towards the efficient strength control

Quantifying thiol–gold interactions towards the efficient strength control

Size Focusing of Nanoparticles by Thermodynamic Control through Ligand Interactions. Molecular Clusters Compared with Nanoparticles of Metals

Propriedades estruturais e eletrônicas das nanopartículas puras e core-shell de prata e de ouro

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