Buscar
Mostrando ítems 41-50 de 82
Electrochemical formation and characterization of Au nanostructures on a highly ordered pyrolytic graphite surface
(Elsevier Science, 2016-01)
The electrochemical formation of Au nanoparticles on a highly ordered pyrolytic graphite (HOPG) substrate using conventional electrochemical techniques and ex-situ AFM is reported. From the potentiostatic current transients ...
Ultrathin Gold Nanowires with the Polytetrahedral Structure of Bulk Manganese
(American Chemical Society, 2018-09-10)
Despite the intensive interest in thin gold nanowires for a variety of technologically important applications, key details of the mechanism of their formation and atomic-scale structure remain unknown. Here we synthesize ...
Determination of heat transfer coefficients in plastic French straws plunged in liquid nitrogen
(2014)
Abstract: The knowledge of the thermodynamic process during the cooling of reproductive biological systems is important to assess and optimize the cryopreservation procedures. The time temperature curve of a sample immersed ...
Influência da convecção termossolutal na transição colunar/equiaxial em ligas Al-Si sob condições unidirecionais e transitórias de extração de calorInfluence of thermosolutal convection on columnar/equiaxial transition in Al-Si alloys under unidirectional and transient heat extraction conditions
(Universidade Federal do ParáBrasilInstituto de TecnologiaUFPAPrograma de Pós-Graduação em Engenharia Mecânica, 2014)
Mechanistic study of methanol electro-oxidation on nickel thin films
(Instituto Tecnológico y de Estudios Superiores de Monterrey, 2020-06)
Self-terminated nickel electrodeposition was studied on gold microelectrodes in the presence of sulfate and chloride ions. The voltammograms in both electrolytes conditions revealed a sharp current spike that was correlated ...
Estudo mecanístico de reações de estado sólido: o caso do sistema Pb/PbSO4/Na2SO4
(Universidade Federal de São CarlosUFSCarPrograma de Pós-Graduação em Química - PPGQCâmpus São Carlos, 2012-11-21)
In this work, the growth and reduction of PbSO4 in Na2SO4 solution under transient conditions was characterized. A novel methodology for the working-electrode surface preparation before stabilization enhanced the voltametric ...
Supersonic Dislocation Bursts in Silicon
(Nature Publishing Group, 2016-06)
Dislocations are the primary agents of permanent deformation in crystalline solids. Since the theoretical prediction of supersonic dislocations over half a century ago, there is a dearth of experimental evidence supporting ...
Effect of subsurface voids on the nanoindentation of Fe crystals
(IOP Publishing, 2020-01)
Subsurface voids may strongly affect the response of materials to nanoindentation. We explore these effects for a bcc single-crystalline Fe sample using molecular dynamics simulation. Deformation occurs mainly by nucleation ...
Effect of subsurface voids on the nanoindentation of Fe crystals
(IOP Publishing Ltd., 2020-03)
Subsurface voids may strongly affect the response of materials to nanoindentation. We explore these effects for a bcc single-crystalline Fe sample using molecular dynamics simulation. Deformation occurs mainly by nucleation ...