Oleic acid assisted formation mechanism of CuInS2 nanocrystals with tunable structures

RSC Advances ◽  
2014 ◽  
Vol 4 (69) ◽  
pp. 36875-36881 ◽  
Author(s):  
Fengcong Gong ◽  
Shouqin Tian ◽  
Baoshun Liu ◽  
Dehua Xiong ◽  
Xiujian Zhao

CuInS2 nanocrystals with different phase structures were synthesized by a facile heat-up method through simply adjusting the OA dosage. This is because a high OA dosage could facilitate the formation and crystallization of the CuIn(SR)x intermediate, giving a metastable wurtzite CuInS2 structure, while low OA dosage would lead to low crystallinity of the intermediate, producing a stable zinc-blende phase.

CrystEngComm ◽  
2014 ◽  
Vol 16 (41) ◽  
pp. 9596-9602 ◽  
Author(s):  
Chao Yu ◽  
Linlin Zhang ◽  
Long Tian ◽  
Dan Liu ◽  
Fanglin Chen ◽  
...  

Monodisperse chalcopyrite and wurtzite CuInS2 nanocrystals are produced and their crystal phases are controlled by varying the In precursors.


1983 ◽  
Vol 24 ◽  
Author(s):  
Akira Sawaoka ◽  
Tamotsu Akashi

ABSTRACTThe structural changes of graphite-like boron nitride caused by multiple shock-compressions were investigated. Wurtzite type, zinc blende type, new modification and amorphous of BN induced by multiple shock-compressions were obtained. Formation mechanism of high dense form boron nitride under shock compression was discussed.


2016 ◽  
Vol 603 ◽  
pp. 243-248 ◽  
Author(s):  
Seonho Jung ◽  
Ji-Hyun Cha ◽  
Duk-Young Jung

Author(s):  
J. S. Lally ◽  
L. E. Thomas ◽  
R. M. Fisher

A variety of materials containing many different microstructures have been examined with the USS MVEM. Three topics have been selected to illustrate some of the more recent studies of diffraction phenomena and defect, grain and multi-phase structures of metals and minerals.(1) Critical Voltage Effects in Metals and Alloys - This many-beam dynamical diffraction phenomenon, in which some Bragg resonances vanish at certain accelerating voltages, Vc, depends sensitively on the spacing of diffracting planes, Debye temperature θD and structure factors. Vc values can be measured to ± 0.5% in the HVEM ana used to obtain improved extinction distances and θD values appropriate to electron diffraction, as well as to probe local bonding effects and composition variations in alloys.


Author(s):  
M.D. Bentzon ◽  
J. v. Wonterghem ◽  
A. Thölén

We report on the oxidation of a magnetic fluid. The oxidation results in magnetic super lattice crystals. The “atoms” are hematite (α-Fe2O3) particles with a diameter ø = 6.9 nm and they are covered with a 1-2 nm thick layer of surfactant molecules.Magnetic fluids are homogeneous suspensions of small magnetic particles in a carrier liquid. To prevent agglomeration, the particles are coated with surfactant molecules. The magnetic fluid studied in this work was produced by thermal decomposition of Fe(CO)5 in Declin (carrier liquid) in the presence of oleic acid (surfactant). The magnetic particles consist of an amorphous iron-carbon alloy. For TEM investigation a droplet of the fluid was added to benzine and a carbon film on a copper net was immersed. When exposed to air the sample starts burning. The oxidation and electron irradiation transform the magnetic particles into hematite (α-Fe2O3) particles with a median diameter ø = 6.9 nm.


1958 ◽  
Vol 34 (5) ◽  
pp. 901-909 ◽  
Author(s):  
Ervin Kaplan ◽  
Bernard D. Edidin ◽  
Robert C. Fruin ◽  
Lyle A. Baker

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