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Metal nanoclusters with precisely modulated structures at the nanoscale give us the opportunity to synthesize and investigate 1D nanomaterials at the atomic level. Herein, it realizes selective 1D growth of building block nanocluster “Au13Cd2” into three structurally different nanoclusters: “hand‐in‐hand” (Au13Cd2)2O, “head‐to‐head” Au25, and “shoulder‐to‐shoulder” Au33. Detailed studies further reveals...
Metal oxides have advantages over the traditional noble metals to be used as substrate materials for surface‐enhanced Raman spectroscopy (SERS) with low cost, versatility, and biocompatibility, but their enhancement factors are generally quite low with a poor limit of detection. Here, ultrathin molybdenum dioxide (MoO2) nanosheets synthesized by chemical vapor deposition demonstrated in large area...
A quick method for estimating the layer number of black phosphorus is demonstrated by simple color‐comparison using optical microscope in this paper. A thickness‐dependent reflection model of black phosphorus/SiO2/Si is constructed and a colorbar confirmed by experiments is obtained for quick identifying layer number. The enhanced visibility affected by substrates or wavelength of light is further...
A series of triphenylamine-based chromophores (L1–3) with donor-π-donor (D-π-D) model have been designed and synthesized via solid phase Wittig reaction. Their one/two-photon fluorescence and electrochemical properties have been investigated. The results show that L2 and L3 exhibited strong and wide-dispersed two-photon-excited fluorescence (TPEF) in different solvents. Chromophore L3 displays the...
The morphology of graphene domains is very sensitive to growth conditions in the chemical vapor deposition process. Here, we demonstrate the growth of well-crystallized monolayer dendritic graphene domains with size up to 100-micron under controlled conditions. The dendritic graphene domains appear only on the copper surface closer to the quartz tube, while graphene on the opposite copper surface...
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