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LIU'S GROUP
In this research, The structure resolution of (CdSe)13(OA)13 nanocluster is reported. With combination of nondestructive SAXS, WAXS, XRD, EXAFS, and MAS NMR techniques, we are able to verify the phase transformation, shape, size dimension, local bonding, and chemical environments of (CdSe)13 nanoclusters, which are indicative of a twin-cluster model and consequently suggest the formation pathway of sheets-like 2D morphology via self assembly.
We want to grow mesoporous zeolite thin films (MZTFs) on ITO than plating Cu . SEM images of different cleaning agent (A) plasma (10 min) (B) ETOH (10 min) three times (C) HCl, DI, KOH, DI, ETOH, DI (5 min) (D) HCl, DI, acetone (10 min) and SEM images of plating Cu with (A)(C)(D) 10 cycles (B) 20 cycles . The potential of plating Cu was swept from 100 mV to -600 mV.
With three-composed-surfactant system, we can optimize the arrangement of the vertical channels assembling as mesoporous zeolite thin films (MZTFs). Under a specific ratio of anionic surfactants and cationic surfactants, MZTFs will have the most order arrangement of the vertical channels. After performing different times of electrochemical reduction, we can plate metals on MZTFs in nanoparticles form or porous structure, which may do a large progress in catalytic chemistry.
Here we introduce the high crystallinity and water stability 2D CdSe(en)¬0.5 nanosheets as photocatalyst for water splitting and CO2 reduction. In addition of single species catalyst, We further develop co-catalyst-impregnated M@CdSe(en)0.5 nanomaterials for enhanced HER activity.
Match-like heterojunctions composed of Ag2S, CdS and ZnS segments were successively confined within the same confinement regimes.The heterostructures in 1D morphology (>500 nm) and compositions were characterized in TEM/STEM with EDS spatial mapping. The band structures were revealed by multiple fluorescence profiles in UV, visible and NIR, resulting in lifetimes for different recombination pathways.
We employed short-chain diamine ligand, namely en, which can recrystallize the (CdSe)13 cluster at different temperature, resulting in sheet-like nano-crystals with various dimensions. The crystal structure of 2D CdSe nanosheets was refined via Rietveld analysis, which allows us to truly resolve atomistic positions of all inorganic frameworks .
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We prepare uniform ZnS nanowires (5-20 nm) via solution-solid-solid (SSS) mechanism in a facile one-step synthesis. The nanowires have uniform diameters regardless of synthesis temperature (120-200 ℃) and controlled lengths (100-600 nm) by tuning the molar ratios of Ag/Zn in compositions. Additionally, hetero-structures composed of oriented nanowires grown from substrates can be rationally obtained via impregnation of Ag+ ions into mesoporous silica materials prior to SSS growth.
Comparison of various functional precursors and bipyridine ligands toward reactivity and delivering of Sn-based 2D chalcogenides. We employed long-chain amine ligand, namely oleylamine, which resulting in sheet-like or flower-like nanostructures with various dimensions.
With oil-induced co-assembly process, we can grow mesoporous zeolytic thin films (MZTFs) with vertical channels on centimeter-sized substrates. Two sets of hcp patterns of mesopore arrays in GISAXS analysis, two sets of in-plane signals via phi-rotation in GIXRD, as well as two-layers of mesopores in TEM image were observed. This is the first report of zeolytic mesoporous on-substrate thin-films in sub-20 nm scale.
Here we introduce a new approach to grow semiconductor nanowires from mesoporous zeolite structure. In the first step, we obtain the mesoporous zeolite having pore distribution of 5-7 nm, and then load nanoparticle catalyst into mesochannels. Finally, we take advantage of our nanoparticles’ superionic property to grow nanowires from mesochannels.
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