A5026946046- Nanocluster Synthesis and Applications
- Gold and Silver Nanoparticles Synthesis and Applications
- Advanced Nanomaterials in Catalysis
- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Quantum Dots Synthesis And Properties
- Random Matrices and Applications
- Copper-based nanomaterials and applications
- Chemical and Physical Properties of Materials
- Advanced Materials and Semiconductor Technologies
- Advanced Photocatalysis Techniques
- Nanotechnology research and applications
- Graphene and Nanomaterials Applications
- Electrocatalysts for Energy Conversion
King Abdullah University of Science and Technology
2013-2016
The bottom-up assembly of nanoparticles into diverse ordered solids is a challenge because it requires nanoparticles, which are often quasi-spherical, to have interaction anisotropy akin atoms and molecules. Typically, has been introduced by changing the shape inorganic nanoparticle core. Here, we present design, self-assembly, optical properties, total structural determination Ag29(BDT)12(TPP)4, an atomically precise tetravalent nanocluster (NC) (BDT, 1,3-benzenedithiol; TPP,...
Abstract A high quantum yield (QY) of photoluminescence (PL) in nanomaterials is necessary for a wide range applications. Unfortunately, the weak PL and moderate stability atomically precise silver nanoclusters (NCs) suppress their utility. Herein, we accomplished ≥26‐fold QY enhancement Ag 29 (BDT) 12 (TPP) 4 cluster (BDT: 1,3‐benzenedithiol; TPP: triphenylphosphine) by doping with discrete number Au atoms, producing 29− x , =1–5. The Au‐doped clusters exhibit an enhanced intense red...
The properties of atomically monodisperse noble metal nanoclusters (NCs) are intricately intertwined with their precise molecular formula. vast majority size-specific NC syntheses start from the reduction salt and thiol ligand mixture. Only in gold was it recently shown that ligand-exchange could induce growth NCs one species to another, a process yet unknown reversibility. Here, we present for ligand-exchange-induced silver NCs, biphasic liquid–liquid system, which is particularly interest...
Atomically precise thiolate-protected noble metal molecular nanoparticles are a promising class of model nanomaterials for catalysis, optoelectronics, and the bottom-up assembly true crystals. However, these applications have not fully materialized due to lack ligand exchange strategies that add functionality, but preserve properties remarkable particles. Here we present method rapid (<30 s) complete thiolate-for-thiolate highly sought after silver nanoparticle [Ag44(SR)30]−4. Only by using...
Achieving water splitting at low overpotential with high oxygen evolution efficiency and stability is important for realizing solar to chemical energy conversion devices. Herein we report the synthesis, characterization electrochemical evaluation of highly active nickel nanoclusters (Ni NCs) oxidation overpotential. These atomically precise monodisperse Ni NCs are characterized by using UV-visible absorption spectroscopy, single crystal X-ray diffraction mass spectrometry. The molecular...
We report the synthesis of atomically monodisperse thiol-protected silver nanoclusters [Ag44(SR)30 ]m, (SR = 5-mercapto-2-nitrobenzoic acid) in which product nanocluster is highly stable contrast to previous preparation methods. The method one-pot, scalable, and produces that are aqueous solution for at least 9 months room temperature under ambient conditions, with very little degradation their unique UV-Vis optical absorption spectrum. composition, size, monodispersity were determined by...
Abstract A high quantum yield (QY) of photoluminescence (PL) in nanomaterials is necessary for a wide range applications. Unfortunately, the weak PL and moderate stability atomically precise silver nanoclusters (NCs) suppress their utility. Herein, we accomplished ≥26‐fold QY enhancement Ag 29 (BDT) 12 (TPP) 4 cluster (BDT: 1,3‐benzenedithiol; TPP: triphenylphosphine) by doping with discrete number Au atoms, producing 29− x , =1–5. The Au‐doped clusters exhibit an enhanced intense red...
We quantitatively separate the contributions of static and collision-caused photo-induced electron transfer from Ag<sub>29</sub>NC clusters to MV<sup>2+</sup> through both transient absorption time-resolved fluorescence experiments.
We report how electrostatic interactions significantly impact charge transfer at CdTe QDs/fullerene interfaces.
Noble metal nanoclusters (NCs) play a pivotal role in bridging the gap between molecules and quantum dots. Fundamental understanding of evolution structural, optical, electronic properties these materials various environments is paramount importance for many applications. Using state-of-the-art spectroscopy, we provide first decisive experimental evidence that electronic, optical Ag44(MNBA)30 NCs can now be tailored by controlling chemical environment. Infrared photoelectron spectroscopies...