نتایج جستجو برای: nano clusters
تعداد نتایج: 163262 فیلتر نتایج به سال:
Chemists have been fascinated for a long time with phenomenon of bimolecular spectroscopy and dynamics of Nano–sized molecules and clusters as cross–linking–induced anti–cancer and Immune-Oncology (I-O) Nano drugs delivery in DNA/RNA of human cancer cells’ membranes under synchrotron radiations [1–25]. This concept generally associated with anti– cancer and Immune-Oncology (I-O) Nano drugs deli...
The nano-domain, with short-range ordered structure, has been widely observed in rare-earth-doped ceria. Atomistic simulation has been employed to investigate the ordering structure of the nano-domain, as a result of aggregation and segregation of dopant cations and the associated oxygen vacancies in gadolinium-doped ceria. It is found that the binding energy of defect cluster increases as a fu...
Direct molecular imaging of nano-spatial relationship between T cell receptor (TCR)/CD3 and CD4 or CD8 co-receptor before and after activation of a primary T cell has not been reported. We have recently innovated application of near-field scanning optical microscopy (NSOM) and immune-labeling quantum dots (QD) to image Ag-specific TCR response during in vivo clonal expansion, and now up-graded ...
The historical notion regarding the inability of gold to catalyze reactions has been discarded in view of recent studies, which have clearly demonstrated the high catalytic efficiency of supported nano-gold catalysts. Although nano-Au catalysts are known to catalyze a variety of reactions, the major focus has been on CO oxidation catalysis. In this work we focus on the important aspects related...
Exploring the reactivity of metal clusters is an important task in cluster science, while only a few previous studies involve the reactions of nano-sized ones. Here we report a kinetic measurement on reactions of Ag(n)(-) (n = 6-69) with O2 using a flow reactor running at 120 K. Their relative rates were obtained by fitting decay processes of parent ions at different O2 flow rates. Comparing th...
The growth of freshly formed aerosol particles can be the bottleneck in their survival to cloud condensation nuclei. It is therefore crucial to understand how particles grow in the atmosphere. Insufficient experimental data has impeded a profound understanding of nano-particle growth under atmospheric conditions. Here we study nano-particle growth in the CLOUD (Cosmics Leaving OUtdoors Droplets...
Cluster formation is an important subject in various areas of physics. In astronomy, ice clusters are believed to aggregate into planetesimals [1], the base of what we know as planets today. In granular materials, our area of research, tiny nanoNewton forces are responsible for macroscopic clusters in free falling jets [3] – similar to the ones that appear in nano jets from plasma physics [2]. ...
Supramolecular recognition of thymine (or its analogs) with various central cations can form magic number clusters. Dual nano-ESI via theta tip emitters was used to on-line synthesize clusters. Even thermodynamically unstable clusters can be detected by MS thanks to the very short life-time (∼ms) of the generated microdroplets. By recording characteristic cluster distributions, isomers can be c...
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