Publikationsdatum:
2007-10-20
Beschreibung:
Structural information on nanometer-sized gold particles has been limited, due in part to the problem of preparing homogeneous material. Here we report the crystallization and x-ray structure determination of a p-mercaptobenzoic acid (p-MBA)-protected gold nanoparticle, which comprises 102 gold atoms and 44 p-MBAs. The central gold atoms are packed in a Marks decahedron, surrounded by additional layers of gold atoms in unanticipated geometries. The p-MBAs interact not only with the gold but also with one another, forming a rigid surface layer. The particles are chiral, with the two enantiomers alternating in the crystal lattice. The discrete nature of the particle may be explained by the closing of a 58-electron shell.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Jadzinsky, Pablo D -- Calero, Guillermo -- Ackerson, Christopher J -- Bushnell, David A -- Kornberg, Roger D -- AI21144/AI/NIAID NIH HHS/ -- Y1-CO-1020/CO/NCI NIH HHS/ -- Y1-GM-1104/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2007 Oct 19;318(5849):430-3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Structural Biology, Stanford University School of Medicine, Stanford, CA 94305, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17947577" target="_blank"〉PubMed〈/a〉
Schlagwort(e):
Benzoates/*chemistry
;
Chemistry, Physical
;
Crystallization
;
Crystallography, X-Ray
;
Gold/*chemistry
;
Macromolecular Substances/*chemistry
;
Metal Nanoparticles/*chemistry
;
Models, Chemical
;
Molecular Structure
;
Physicochemical Phenomena
;
Stereoisomerism
;
Sulfhydryl Compounds/*chemistry
Print ISSN:
0036-8075
Digitale ISSN:
1095-9203
Thema:
Biologie
,
Chemie und Pharmazie
,
Informatik
,
Medizin
,
Allgemeine Naturwissenschaft
,
Physik
