To improve signal stability and quantitation, an optically stable, novel class of fluorophore for hybridization analysis of human metaphase chromosomes is demonstrated. Detection of hybridization sites in situ was based on fluorescence from streptavidin-linked inorganic crystals of cadmium selenide [(CdSe)ZnS]. Fluorescence of nanocrystal fluorophores was significantly brighter and more photost...

Chitin Nanocrystal Structure In article number 2200320, Yurtsever, Fukuma, and co-workers provided the molecular-scale structural details of chitin nanocrystals in water by combining 3D atomic force microscopy experiments molecular dynamics simulations. The characterization nanocrystal surfaces at scale could pave way for assessing chemical enzymatic activities on nanocrystals, offering an unde...

Structural characterization via transmission electron microscopy and atomic force microscopy of arrays of small Si nanocrystals embedded in SiO2, important to many device applications, is usually difficult and fails to correctly resolve nanocrystal size and density. We demonstrate that scanning tunneling microscopy sSTMd imaging enables a much more accurate measurement of the ensemble size dist...

A semiconductor nanocrystal film is a unique class of nanocomposite, whose collective properties are determined by those of its constituents. Colloidal synthetic methods offer precise size control and finely tuned optical properties via quantum confinement, while recent improvements in charge transport through films have led to a variety of optoelectronic applications. However, understanding th...

Colloidal semiconductor nanocrystals have attracted attention for cost-effective, solution-based deposition of quantum-confined thin films for optoelectronics. However, two significant challenges must be addressed before practical nanocrystal-based devices can be realized. The first is coping with the ligands that terminate the nanocrystal surfaces. Though ligands provide the colloidal stabilit...

Self-assembled cobalt (Co) nanocrystals on ultra-thin silicon dioxide layer were fabricated by in situ annealing Co ultrathin films deposited with Co effusion cell in a molecular-beam-epitaxy chamber. The resultant nanocrystals obtained at the optimized annealing temperature are around 3–4 nm in diameter with dot density of about 1 · 10 cm . The metal–oxide–semiconductor capacitors containing C...

The adsorption isotherms of Fe(CO), on Nay, HY and Linde L zeolites obtained in McBain balances show micropore adsorption, whereas additional capillary condensation is found with zeolite omega and Na-mordenite. The pores and/or cages of the zeolites studied are completely filled with the complex upon saturation, with the exception of Na-mordenite. Their behaviour is explained, respectively, by ...

The uptake mechanisms of Ni(II) on mordenite were investigated by 13 macroscopic experiments and extended X-ray absorption fine structure (EXAFS) 14 spectroscopy. The results demonstrated that Ni(II) could be retained via different 15 mechanisms, depending on pH, ionic strength, temperature etc. At low pH, the uptake 16 of Ni(II) is primarily dominated by cation exchange and/or outer-sphere sur...

The structure evolution of CdSe nanocrystal with different grown sizes (1.9, 2.7 and 3.1 nm, respectively) obtained by size-selective method from colloidal solution is investigated by XAFS. By such purposeful design of samples, we have investigated the isolated ripening process effect on the structure of nanocrystals. The Se K-edge XAFS results of CdSe nanocrystals show that structure disorder ...