共搜索到35551条信息,每页显示10条信息,共3556页。用时:0小时0分0秒531毫秒
......
Qi-hou, HE Xian-da, CHEN Song, et al. Effects of solvent thermal treatment on structures and morphologies of ZnS and CdS ultrafine powders [J]. The Chinese Journal of Nonferrous Metals, 2003, 13(4... 2. 2 ZnS粉末的形貌 采用工艺B,制备时间为60 min的ZnS粉末的SEM照片如图1所示.可以看出,ZnS粉末呈球形颗粒,有明显的团聚现象,团聚颗粒的尺寸约为0.5 μm,团聚颗粒由细小的颗粒组成,单个ZnS颗粒的尺寸约为60 nm. 图1 ZnS粉末的微观形貌 Fig.1 Micrograph of ZnS powders......
, is used to fabricate ultrafine core-shell nickel spheres. The size distribution, morphology, chemical and catalyzed properties of the synthesized spheres can be controlled by regulating the preparation... in the solution, the hollow spheres are formed. The higher the alkali content, the more the ultrafine colloidal cores. Key words: ultrafine particles; core-shell; self-sacrifice; morphology 1 Introduction......
; colloidal assemblies; quantum-confined effect; UV-absorption spectroscopy 1 Introduction In the past decade, the synthesis of nanoparticles with controlled size, structure and morphology has stimulated... demonstrated the organization of Au nanoparticles into a 3D network structure by a site-exchange reaction. However, there are few reports concerning the assembly of ZnS building blocks into hierarchical......
EFFECT OF ANNEALING TREATMENT ON THE STRUCTURE OF CdS FILMS K.J.Liao1,G.B.Liu1,C.G.Hu1,L.H.Feng2,Q.Feng1,W.L.Wang1 (1.Department of Applied Physics, Chongqing University, Chongqing 400044, China...) Abstract:The effect of annealing treatment on the structure of CdS films was investigated.The cadmium sulfide thin films were prepared by chemical bath deposition, and were annealed at nitrogen atmosphere......
CdS crystallites. Fig. 2 XRD patterns of prepared CdS nanocrystallites Fig. 3 EDS spectrum collected from CdS nanocrystallites prepared with EDTA 3.2 Morphology The FE-SEM images of the CdS powders... No.65-2887). The SEM image (Fig. 7(b)) of the as-prepared CdS crystals shows an irregular morphology, which is consistent with the XRD result. Hexagonal wurtzite structure is the high-temperature......
] has achieved the blue luminescence, however in order to realize it, inorganic ZnS shells are used to modify CdS cores to form a CdS/ZnS core-shell nanostructures. The blue luminescence was found..., and the insight mechanism of emission was not fully presented. In this work, we found that by adjusting the reactant concentration and post-treatment of the obtained CdS nanocrystals, the band-edge......
, oxidation, thermal and magnetic properties of ZnS:Ce nanorods synthesized by a chemical co-precipitation method were reported. The crystalline phase transformation from cubic to hexagonal structure... reflectance spectra of the powders were recorded by using (Perkin Elmer-Lambda 35) Spectro photometer in the wavelength range of 200-800 nm. The morphology of ZnS and Ce doped ZnS was examined by transmission......
-SEM images show the granular morphological structure for all the samples. The agglomeration size of the samples in the range of 10-50 nm for CdS:Cu and 50-100 nm for ZnS:Cu is observed. Key words... for Ag-doped CdS nanoparticles [10]. Table 1 Crystal structure and crystalline size of CdS and Cu and Ag incorporated CdS nanoparticles The XRD patterns of ZnS [12] and Cu and Ag incorporated ZnS thin......
Morphology of ultrafine Co3O4 powders Fig.5(a) shows that the short strip particles of CoC2O4·2H2O with the average length below 6 μm stack disorderly. In conventional production method, the Co3O4 powders... Preparation of ultrafine Co3O4 powders by continuous and controllable combustion synthesis WU Chong-hu1, 2 1. China National R&D Center for Tungsten Technology, Xiamen Tungsten Co., Ltd......