On multiple temporal and spatial scales, chemistry explores the composition, structure and form of matter, its physical properties and biological activity as well as the chemical changes and synthesis reactions, striv...On multiple temporal and spatial scales, chemistry explores the composition, structure and form of matter, its physical properties and biological activity as well as the chemical changes and synthesis reactions, striving to describe the colorful world of matter and reveal the molecular secrets of matter transformations and life processes using its theories and its unique language.As a fundamental and creative discipline of science, chemistry not only helps us to understand the nature of substances and make high-performing materials to serve economic development, but is distinctively characterized by the ability to invent novel and marvelous matters.展开更多
A two-dimensional (2D) ordered hexagonal close-packed structure, formed by 1-nonanethiol-capped gold nanoparticles, is reported. The structure was constructed only by dipping the gold nanoparticle colloidal solution o...A two-dimensional (2D) ordered hexagonal close-packed structure, formed by 1-nonanethiol-capped gold nanoparticles, is reported. The structure was constructed only by dipping the gold nanoparticle colloidal solution on flat substrate. The gold nanoparticles were synthesized as follows: First, AuCl4-1 was transferred from aqueous solution to toluene by the phase-transfer reagent of tetraoc-tylanunonium bromide. Then it was reduced with aqueous sodium borohydride in the presence of a given amount of 1-nonanethiol molecules which was used to control the nu-cleation and growth of the gold nanoparticles for the desired size. The experimental techniques, such as UV-Vis, FT-IR, and X-ray photoelectron spectroscopy (XPS), were employed to characterize the obtained product. Transmission electron microscopy (TEM) measurement demonstrated the size of the gold nanoparticle and the formation of two-dimensional ordered hexagonal close-packed gold nanoparticle structure.展开更多
文摘On multiple temporal and spatial scales, chemistry explores the composition, structure and form of matter, its physical properties and biological activity as well as the chemical changes and synthesis reactions, striving to describe the colorful world of matter and reveal the molecular secrets of matter transformations and life processes using its theories and its unique language.As a fundamental and creative discipline of science, chemistry not only helps us to understand the nature of substances and make high-performing materials to serve economic development, but is distinctively characterized by the ability to invent novel and marvelous matters.
文摘A two-dimensional (2D) ordered hexagonal close-packed structure, formed by 1-nonanethiol-capped gold nanoparticles, is reported. The structure was constructed only by dipping the gold nanoparticle colloidal solution on flat substrate. The gold nanoparticles were synthesized as follows: First, AuCl4-1 was transferred from aqueous solution to toluene by the phase-transfer reagent of tetraoc-tylanunonium bromide. Then it was reduced with aqueous sodium borohydride in the presence of a given amount of 1-nonanethiol molecules which was used to control the nu-cleation and growth of the gold nanoparticles for the desired size. The experimental techniques, such as UV-Vis, FT-IR, and X-ray photoelectron spectroscopy (XPS), were employed to characterize the obtained product. Transmission electron microscopy (TEM) measurement demonstrated the size of the gold nanoparticle and the formation of two-dimensional ordered hexagonal close-packed gold nanoparticle structure.
