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	Assembly of Uniform Photoluminescent Microcomposites Using a Novel Micro-Fluidic-Jet-Spray-Dryer
	Wu, Winston Duo（Monash Univ, Dept Chem Engn） ; Amelia, Ria（Monash Univ, Dept Chem Engn） ; Hao, Na（Monash Univ, Dept Chem Engn） ; Selomulya, Cordelia（Monash Univ, Dept Chem Engn） ; Zhao, Dongyuan（Fudan Univ, Dept Chem） ; Chiu, Yu-Lung ( Univ Birmingham, Sch Met & Mat） ; Chen, Xiao Dong ; Chen XD(陈晓东)
	2011-06-19
关键词	monodisperse microcomposites surface morphology spray drying silica nanoparticles
英文摘要	Generation of uniform micro-particles containing (i) pure lactose; (ii) silica nanoparticles and lactose; (iii) silica nanoparticlesllactose doped with Eu(III) have been successfully achieved using a novel spray dryer with a uniquely designed microfluidic aerosol nozzle as the monodisperse droplet generator. Here we investigate the impacts of precursor compositions and concentrations, as well as the drying temperature profile on particle size, morphology, and surface element distribution. Distinct morphologies are observed with different precursor compositions, ranging from smooth spherical lactose microparticles to the buckled shape for composites containing silica nanoparticles. The formation of such morphology is qualitatively interpreted by using Peclet number, indicating that the presence of the suspended silica nanoparticles facilitates shell formation at the early stage of the drying process. As the drying continue, such shell is subject to buckling, induced by the capillary force due to the lower mechanical integrity inside the droplet. Post calcination, transmission electron micrographs of Eu(III)Isilica nanoparticlesllactose microcomposites confirm the formation of nano-sized Eu,03 homogeneously embedded on the silica shell. Photoluminescence spectra of these particles indicate that enhancement of photoluminescence intensity is directly related to the europium loading, which could be adjusted from the precursor composition. This work demonstrates a scalable route to assemble relatively complex composites with uniform properties, without extensive conjugation or purification steps commonly required in wet chemistry-based processes. (C) 2011 American Institute of Chemical Engineers AIChE J, 57: 2726-2737, 2011; Australian Research Council; Monash Research Graduate School and Department of Chemical Engineering, Monash University
语种	英语
出版者	WILEY-BLACKWELL
内容类型	期刊论文
源URL	[http://dx.doi.org/doi:10.1002/aic.12489]
专题	化学化工－已发表论文
推荐引用方式 GB/T 7714	Wu, Winston Duo,Amelia, Ria,Hao, Na,et al. Assembly of Uniform Photoluminescent Microcomposites Using a Novel Micro-Fluidic-Jet-Spray-Dryer[J],2011.
APA	Wu, Winston Duo.,Amelia, Ria.,Hao, Na.,Selomulya, Cordelia.,Zhao, Dongyuan.,...&陈晓东.(2011).Assembly of Uniform Photoluminescent Microcomposites Using a Novel Micro-Fluidic-Jet-Spray-Dryer..
MLA	Wu, Winston Duo,et al."Assembly of Uniform Photoluminescent Microcomposites Using a Novel Micro-Fluidic-Jet-Spray-Dryer".(2011).

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