Zobrazeno 1 - 10
of 10
pro vyhledávání: '"Janet M. Petroski"'
Publikováno v:
Journal of Organometallic Chemistry. 694:1138-1143
We find that hydrogen is formed (slowly) in the reaction of “naked gold” with thiols in toluene, thereby establishing the fate of a significant fraction of the thiol H when thiols react with gold nanoparticles to yield monolayer-protected cluster
Autor:
Mostafa A. El-Sayed, Janet M. Petroski
Publikováno v:
The Journal of Physical Chemistry A. 107:8371-8375
FTIR spectroscopy has been used to study the binding geometry of polyacrylate capping material on cubic and tetrahedral platinum nanoparticles. It is proposed that the capping material forms an ester-like linkage to the Pt surface on the tetrahedral
Publikováno v:
The Journal of Physical Chemistry A. 106:11714-11718
The FTIR spectra of six argon-matrix-isolated flavonols were measured. Carbonyl stretching frequencies for the following compounds were the following: flavone, 1669 cm - 1 ; chromone, 1676 cm - 1 ; 5-hydroxyflavone (5HF), 1660 cm - 1 ; 3-hydroxyflavo
Publikováno v:
The Journal of Physical Chemistry A. 105:5542-5547
The addition of dodecanethiol to a polydisperse platinum colloidal aqueous solution capped with acrylic acid leads to self-assembled monolayers which not only contain various sizes, but also various shapes of nanoparticles. Assembled monolayers arran
Publikováno v:
The Journal of Physical Chemistry B. 102:6145-6151
We report transmission electron microscopic studies of in-situ temperature-induced shape transformation and melting behavior of polymer-capped cubic and tetrahedral nanocrystals. Our results indicate that the surface-capping polymer is removed by ann
Publikováno v:
The Journal of Physical Chemistry B. 102:3316-3320
Many studies on colloidal nanoparticles have focused on the control of nanoparticle size and correlated this to the catalytic activity. Recently, our group has reported for the first time a technique that controlled the shape distribution of Pt nanop
Publikováno v:
Inorganic Chemistry. 43:1597-1599
Triphenylphosphine-cappped, 1.5-nm gold nanoparticles "Au(101)(PPh(3))(21)Cl(5)" prepared following Hutchison's procedure (Weare, W. W.; Reed, S. M.; Warner, M. G.; Hutchison, J. E. J. Am. Chem. Soc. 2000, 122, 12890) undergo rapid exchange of cappin
Publikováno v:
ChemInform. 29
Many studies on colloidal nanoparticles have focused on the control of nanoparticle size and correlated this to the catalytic activity. Recently, our group has reported for the first time a technique that controlled the shape distribution of Pt nanop
Publikováno v:
Microscopy and Microanalysis. 5:330-331
The catalytic activity and selectivity of nanosize colloidal platinum (Pt) nanocrystals may depend strongly on their sizes and shapes. To determine the shape dependent catalytic behavior of Pt nanocrystals, two key steps are involved. First, shape co
Publikováno v:
Microscopy and Microanalysis. 4:738-739
Formation of metallic nanoparticles produces an increased surface area per unit volume of material, which provides potential applications in enhancing surface catalyzed reactions. Recently, attention has been focused on moving from the solution based