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Synthesis and toxicity assay of ceramic nanophosphors for bioimaging with near-infrared excitation
Publication date: June–September 2012 Source:Progress in Crystal Growth and Characterization of Materials, Volume 58, Issues 2–3 Author(s): Nallusamy Venkatachalam , Eva Hemmer , Tomoyoshi Yamano , Hiroshi Hyodo , Hidehiro Kishimoto , Kohei Soga Yttrium hydroxyl carbonate (Y(OH)CO3) precursors were synthesized by the homogeneous co-precipitation method in the presence of polyacrylic acid (PAAc). Resultant precursor particle size is about 15–20 nm with narrow size distribution whereas the particle size is smaller than those acquired by the conventional homogeneous precipitation method. Effective decrease of...
Source: Progress in Crystal Growth and Characterization of Materials - October 12, 2014 Category: Chemistry Source Type: research

Crystal growth of tin oxide nano-sheets in aqueous solutions and time variation of N2 adsorption characteristics
Publication date: June–September 2012 Source:Progress in Crystal Growth and Characterization of Materials, Volume 58, Issues 2–3 Author(s): Yoshitake Masuda Nucleation and crystal growth of tin oxide were realized in aqueous solutions. Nano-sheet structures grew in the solutions containing SnF2 at 90 °C to develop in-plane size and thickness gradually. Their color, size, morphology, crystal structure and N2 adsorption property varied with progress of crystal growth. Color of powder changed from white to light yellow, light blown to light green particles with growth. XRD analyses clarified that single phase of Sn...
Source: Progress in Crystal Growth and Characterization of Materials - October 12, 2014 Category: Chemistry Source Type: research

High performance visible light responsive photocatalysts for environmental cleanup via solution processing
Publication date: June–September 2012 Source:Progress in Crystal Growth and Characterization of Materials, Volume 58, Issues 2–3 Author(s): Tsugio Sato , Peilin Zhang , Shu Yin Fabrication of nitrogen-doped titania and/or strontium titanate nanoparticles via soft chemical reactions and their performance for environmental cleanup under visible light irradiation were introduced. Nitrogen-doped anatase, brookite and rutile with high specific surface area can be selectively prepared by the solvothermal reactions in mixed aqueous solution of titanium trichloride-hexamethylenetetramine. Nitrogen-doped strontium titana...
Source: Progress in Crystal Growth and Characterization of Materials - October 12, 2014 Category: Chemistry Source Type: research

The formation of 1.13 nm tobermorite under hydrothermal conditions: 1. The influence of quartz grain size within the system CaO–SiO2–D2O
Publication date: June–September 2012 Source:Progress in Crystal Growth and Characterization of Materials, Volume 58, Issues 2–3 Author(s): S. Bernstein , K.T. Fehr The influence of grain size of quartz on the formation of 1.13 nm tobermorite in aerated autoclaved concrete was investigated by applying in-situ neutron diffraction. Experiments were performed at 210 °C/P sat employing quartz of 8 μm and 16 μm, respectively. The results reveal changes in the reaction mechanism from solution control to diffusion control. The grain size of the quartz fraction clearly influences the occurrence of those changes. B...
Source: Progress in Crystal Growth and Characterization of Materials - October 12, 2014 Category: Chemistry Source Type: research

Amino acids-precursors for synthesizing nonlinear optical materials
Publication date: June–September 2012 Source:Progress in Crystal Growth and Characterization of Materials, Volume 58, Issues 2–3 Author(s): Tanusree Kar Some new nonlinear optical materials were synthesized from amino acids l-arginine and l-valine and single crystals were grown from their aqueous solution by solvent evaporation method at constant temperature and slow cooling method. The synthesized materials were identified by carbon, hydrogen, nitrogen (CHN) test and single crystal X-ray diffraction (XRD) analysis. The grown crystals were characterized by measuring their thermal, optical and mechanical properties...
Source: Progress in Crystal Growth and Characterization of Materials - October 12, 2014 Category: Chemistry Source Type: research

Modeling on ammonothermal growth of GaN semiconductor crystals
Publication date: June–September 2012 Source:Progress in Crystal Growth and Characterization of Materials, Volume 58, Issues 2–3 Author(s): Qi-Sheng Chen , Jun-Yi Yan , Yan-Ni Jiang , Wei Li Ammonothermal systems are modeled using fluid dynamics and heat and mass transfer models. The nutrient is considered as a porous media bed and the flow is simulated using the Darcy–Brinkman–Forchheimer model. The resulting governing equations are solved using the finite volume method. The effects of baffle design on flow pattern, heat and mass transfer in an autoclave are analyzed. For the research-grade autoclave with ...
Source: Progress in Crystal Growth and Characterization of Materials - October 12, 2014 Category: Chemistry Source Type: research

Optical imaging and three dimensional reconstruction of the concentration field around a crystal growing from an aqueous solution: A review
Publication date: December 2012 Source:Progress in Crystal Growth and Characterization of Materials, Volume 58, Issue 4 Author(s): Atul Srivastava , K. Muralidhar , P.K. Panigrahi Investigation of transport phenomena around a crystal growing from its aqueous solution has been a subject of intensive research over the last few decades. It involves the characterization of convection patterns and an understanding of their influence on the growth mechanisms of a crystal from a fundamental viewpoint. In this context, laser-based measurement techniques have proved to be a useful tool. Optical techniques are ideal for mappi...
Source: Progress in Crystal Growth and Characterization of Materials - October 12, 2014 Category: Chemistry Source Type: research

The role of grain size on the thermal instability of nanostructured metal oxides used in gas sensor applications and approaches for grain-size stabilization
Publication date: December 2012 Source:Progress in Crystal Growth and Characterization of Materials, Volume 58, Issue 4 Author(s): G. Korotcenkov , B.K. Cho This review examines the influence of grain size on the thermal stability of nanostructured metal oxides by studying their structural parameters. The main consideration was focused on the behavior of SnO2, the most studied and used metal oxide in the field of gas sensor design. It has been shown that a decrease of the grain size was accompanied by a deterioration of the structural stability of the gas sensing material; a change of grain size in the gas sensing ma...
Source: Progress in Crystal Growth and Characterization of Materials - October 12, 2014 Category: Chemistry Source Type: research

Progress on the preparation of nanocrystalline apatites and surface characterization: Overview of fundamental and applied aspects
Publication date: March 2013 Source:Progress in Crystal Growth and Characterization of Materials, Volume 59, Issue 1 Author(s): Jaime Gómez-Morales , Michele Iafisco , José Manuel Delgado-López , Stéphanie Sarda , Christophe Drouet Nanocrystalline calcium phosphate apatites constitute the main inorganic part of hard tissues, and a growing focus is devoted to prepare synthetic analogs, so-called “biomimetic”, able to precisely mimic the morphological and physico-chemical features of biological apatite compounds. Both from fundamental and applied viewpoints, an accurate characterization of nanocrystalline ap...
Source: Progress in Crystal Growth and Characterization of Materials - October 12, 2014 Category: Chemistry Source Type: research

Developments and future directions of phase diagram, physicochemical and optical studies of binary organic complexes
Publication date: June 2013 Source:Progress in Crystal Growth and Characterization of Materials, Volume 59, Issue 2 Author(s): R.N. Rai , R.S.B. Reddi , U.S. Rai The aim of this review is to emphasize solvent free or green synthesis, a most efficient utilization of starting materials to give maximum yield, and an alternative route to producing novel promising materials. In this regard the phase diagram study has shown applications in the determination of the precise composition of binary compounds of a specific nature and in the identification of the parameters that affect the crystal growth. To provide an overview ...
Source: Progress in Crystal Growth and Characterization of Materials - October 12, 2014 Category: Chemistry Source Type: research

Development of LuAG-based scintillator crystals – A review
Publication date: June 2013 Source:Progress in Crystal Growth and Characterization of Materials, Volume 59, Issue 2 Author(s): M. Nikl , A. Yoshikawa , K. Kamada , K. Nejezchleb , C.R. Stanek , J.A. Mares , K. Blazek A review of research and development of Lu3Al5O12 (LuAG)-based single crystal scintillators is presented. Crystals of this type have been prepared by the micro-pulling down method at the initial stage of material screening and by Czochralski or Bridgman methods to obtain higher quality and larger size single crystals afterward. Several different activators, namely Ce3+, Pr3+, Yb3+ and Sc3+ have been...
Source: Progress in Crystal Growth and Characterization of Materials - October 12, 2014 Category: Chemistry Source Type: research

Recent advances in rare earth-based borate single crystals: Potential materials for nonlinear optical and laser applications
Publication date: September 2013 Source:Progress in Crystal Growth and Characterization of Materials, Volume 59, Issue 3 Author(s): R. Arun Kumar , M. Arivanandhan , Y. Hayakawa Due to an increase in the requirement for ultraviolet and visible laser sources nonlinear optical crystals are gaining importance. Borate-based nonlinear optical crystals such as lithium borate LiB3O5 (LBO), CsLiB5O10 (CLBO), SrBe2B2O7 (SBBO), KBe2BO3F2 (KBBF) and K2Al2B2O7 (KAB) have excellent transmission ranges extending from the ultraviolet into the infrared region. But their hygroscopic nature retards their use in real-time applications...
Source: Progress in Crystal Growth and Characterization of Materials - October 12, 2014 Category: Chemistry Source Type: research

Kinetics and intimate mechanism of protein crystal nucleation
Publication date: December 2013 Source:Progress in Crystal Growth and Characterization of Materials, Volume 59, Issue 4 Author(s): Christo N. Nanev Experimental and theoretical investigations on protein crystal nucleation are reviewed. Various experimental applications of the classical principle, which requires separation of the nucleation and growth stages of the crystallization process, are described. Temperature control is used most frequently, hypergravity and concentration changes being auxiliary techniques. Nucleation time-lags are measured by imposing temperature evoked supersaturation gradients. Application pe...
Source: Progress in Crystal Growth and Characterization of Materials - October 12, 2014 Category: Chemistry Source Type: research

Growth of ZnO bulk crystals: A review
Publication date: March 2014 Source:Progress in Crystal Growth and Characterization of Materials, Volume 60, Issue 1 Author(s): Robert Triboulet A critical review is proposed of the different techniques of bulk growth of ZnO crystals for their use as a substrate in the homoepitaxial growth of this attractive compound. The crystals are assessed from their structural and electrical properties and from the structural properties and purity of homoepitaxial films grown on them by various techniques such as plasma-assisted molecular beam epitaxy, pulsed laser deposition, magnetron sputtering, chemical vapor deposition, meta...
Source: Progress in Crystal Growth and Characterization of Materials - October 12, 2014 Category: Chemistry Source Type: research

Progress in the growth of CaCu3Ti4O12 and related functional dielectric perovskites
Publication date: June 2014 Source:Progress in Crystal Growth and Characterization of Materials, Volume 60, Issue 2 Author(s): Laxman Singh , U.S. Rai , K.D. Mandal , N.B. Singh Calcium copper titanate, CaCu3Ti4O12, (CCTO), a potential electro-ceramic is a member of a very important perovskite family and has been found to a show dielectric constant of the order of 104–105. It has a remarkable ability to undergo a series of cationic exchange reactions resulting in corresponding isomorphs. In the past decade there has been immense activity in the search of an isomorph of CCTO with high dielectric constant and low l...
Source: Progress in Crystal Growth and Characterization of Materials - October 12, 2014 Category: Chemistry Source Type: research