nanocrystals – TechConnect Briefs

Infrared active nanoprobes for bio-medical imaging based on inorganic nanocrystals

Podhorodecki A., Banski M., Noculak A., Golacki L., Krajnik B., Woznica H., Lesiak A., Sojka B., Wroclaw University of Technology, PL

Optically active inorganic nanocrystals (NCs) (quantum dots, QDs) are recently widely used in research related to bio-medicine as efficient in vivo and in vitro optical markers but also as building blocks in bio-sensors. However, even [...]

Infrared laser precipitation of ZnAl2O4 nanocrystals doped with Eu3+ and Yb3+ ions and efficient upconversion emission

Bae C-H, Lim K-S, Chungbuk National University, KR

We present a novel and simple method to enable spatially selective ZnAl2O4 nanocrystal formation on the surface of glass. Zinc Aluminate, well-known as a wide band gap semiconductor, has been widely used as high temperature [...]

Intelligent Material Solutions Advancing Technologies

Collins J., Bell H., Intelligent Material Solutions, Inc., US

Sunstone Nanocrystals from Intelligent Material Solutions® Inc. are a proprietary, novel series of rare earth-doped nanocrystals of small size, high quantum efficiency, and high photoluminescent intensity functionalized for use in industrial and life sciences applications. [...]

The methodology and the software for the analysis of the atomic density modulation underneath the surface of a nanocrystal

Gierlotka S., Skrobas K., Stelmakh S., Palosz B., Palosz W., Palosz B., Palosz W., Institute of High Pressure Physics PAS, PL

Internal structure of nanocrystals can be extracted from Pair Distribution Function, which is obtained by Fourier transform of the diffraction data. Such a transform, G(r), contains complete information on inter-atomic distances present in the investigated [...]

Precipitation of In(OH)3 and InOOH Nanocrystals for the use in nanoelectronics: Phase Transition Behavior and Oriented Aggregation

Klaumünzer M., Mackovic M., Ferstl P., Voigt M., Spiecker E., Meyer B., Peukert W., University Erlangen-Nürnberg, DE

With respect to diverse applications in the wide field of nanoelectronics we characterize a specific phase transition behavior and oriented aggregation (OA) during wet chemical synthesis of In(OH)3 nanocrystals as a wide band gap material [...]

Microwave-assisted synthesis of water soluble ZnSe@ZnS quantum dots

Bailon-Ruiz S.J., Perales-Perez O., Singh S.P., University Of Puerto Rico at Mayaguez, PR

Semiconductors nanocrystals known as quantum dots (QD’s) have attracted much attention because of their optical properties can be tuned just by controlling their crystal-size, composition and shape at the nanoscale. Compared to organic dyes, quantum [...]

Synthesis of Nanocrystalline VOx/MgO Aerogels and Their Application for Destructive Adsorption of CF2Cl2

Ilyina E.V., Mishakov I.V., Vedyagin A.A., Bedilo A.F., Klabunde K.J., Boreskov Institute of Catalysis, RU

Nanocrystalline VOx/MgO is extensively studied as a potential catalyst and adsorbent. In this commutation we shall report further advances to the recently developed method for synthesis of binary VOx/MgO aerogels by hydrolysis of the V [...]

Precipitant molar concentration effect on the upconversion emission in BaZrO3:Er,Yb nanocrystalline phosphor

Diaz-Torres L.A., Salas P., Castaño V.M., Oliva J., Angeles-Chavez C., Centro de Física Aplicada y Tecnología Avanzada, Universidad Nacional Autónoma de México, MX

Strong Blue, green, and red upconversion emission of Er3+ in sub-microcrystalline BaZrO3:(Yb3+Er3+) is observed. Powder samples were obtained by a facile hydrothermal process at 100ºC with different water to ethanol solvent ratios. The as synthesized [...]

Effects of Non-radiative energy transfer processes on the visible upconversion in ZrO2:Yb3+/Er3+ nanocrystals

Meza O., Diaz-Torres L.A., Salas P., De la Rosa E., Solis C.D., Centro de Investigaciones en Optica A C, MX

The luminescence dynamics of both near infrared (NIR) and visible (VIS) emission of Yb3+,Er3+ in nanocrystalline ZrO2 is studied. It is found that upconversion emission is dominated by back transfer processes over direct Yb to [...]

Automated Crystal Orientation and Phase Mapping of Iron Oxide Nano-Crystals in a Transmission Electron Microscope

Rouvimov S., Rauch E.F., Moeck P., Nicolopoulos S., Portland State University, US

An automated technique for the crystal phase and orientation mapping of polycrystalline materials in a TEM has recently beam developed. This technique is based on template matching of experimental electron diffraction spot patterns to their [...]