Zobrazeno 1 - 10
of 31
pro vyhledávání: '"Ryongjin Kim"'
Publikováno v:
Journal of Nanoscience and Nanotechnology. 10:2009-2012
A new simple and cheap method to grow large scale SiC-SiO2 nanocables on catalyzed Si substrate directly is presented. The method is based on the thermal decomposition of methanol. The grown nanocables consisted of crystalline 3C-SiC and amorphous Si
Autor:
Kezhi Zheng, Weiping Qin, Daisheng Zhang, Ning Liu, Ryongjin Kim, Guofeng Wang, Guodong Wei, Lili Wang
Publikováno v:
Materials Chemistry and Physics. 119:309-314
Novel SiO 2 hierarchical nanostructure has been grown on SiC nanowires using thermal decomposition of a mixture of ethanol and titanium tetrachloride. Novel nanostructure was realized in one synthesis route. Based on SEM and TEM observations, the hie
Autor:
Weiyou Yang, Weiping Qin, Guangzhu Jing, Daisheng Zhang, Guodong Wei, Ryongjin Kim, Kezhi Zheng, Wei Han, Fengmei Gao, Lili Wang, Ling Liu
Publikováno v:
The Journal of Physical Chemistry C. 113:19432-19438
Low-dimension semiconductor nanostructures were successfully synthesized by a fast, simple, and low-cost microwave method. By heating raw materials under microwave irradiation and controlled conditions, diverse nanostructures for semiconducting oxide
Autor:
Weiping Qin, Goufeng Wang, Ryongjin Kim, Lili Wang, Kezhi Zheng, Daisheng Zhang, Ning Liu, Guodong Wei
Publikováno v:
Journal of Crystal Growth. 311:4301-4305
Large-scale SiC nanocables were synthesized on a Ni(NO 3 ) 2 -catalyzed Si substrate by using a simple and cheap method based on thermal decomposition of methanol. Based on X-ray diffraction and high-magnification transmission electron microscopy, th
Publikováno v:
Journal of Alloys and Compounds. 481:417-421
MoO3 nanoflowers were successfully synthesized on a Si substrate by a facility microwave hydrothermal method. The nanoflowers consisted of tens of nanobelts and the nanobelts were about several micrometers in length, several tens to several hundreds
Autor:
Lili Wang, Weiping Qin, Guodong Wei, Ryongjin Kim, Kezhi Zheng, Ning Liu, Daisheng Zhng, Guofeng Wang
Publikováno v:
Chemical Physics Letters. 475:86-90
Large-scale SiC–SiO 2 core–shell nanowires decorated with carbon nanoparticles have been synthesized on Si substrate using thermal decomposition of ethanol. The amorphous carbon nanoparticles on SiO 2 shell are of hemispherical configuration hivi
Publikováno v:
Journal of Alloys and Compounds. 475:452-455
Cubic and hexagonal NaYF 4 :Ln 3+ (Ln = Eu and Yb/Tm) microcrystals were separately synthesized by an EDTA-assisted solvothermal method. Under 393-nm excitation, the emission spectra of NaYF 4 :Eu 3+ microcrystals show the characteristic Eu 3+ emissi
Autor:
Daisheng Zhang, Kezhi Zheng, Guofeng Wang, Weiping Qin, Guodong Wei, Peifen Zhu, Ryongjin Kim, Lili Wang
Publikováno v:
Applied Physics A. 96:521-527
By using a novel and low-cost microwave method, three-dimensional SiC networks have been synthesized in large-scale. The composition and structural features of the product were characterized by X-ray diffraction, field emission scanning electron micr
Autor:
Peifen Zhu, Ryongjin Kim, Daisheng Zhang, Guodong Wei, Fuheng Ding, Lili Wang, Kezhi Zheng, Guofeng Wang, Weiping Qin
Publikováno v:
Journal of Fluorine Chemistry. 130:158-161
YF3:Yb3+(20%)/Tm3+(2%) octahedral nanocrystals were synthesized by a microemulsion method with NH4HF2. Pumped with a 980-nm diode laser, the nanocrystals emitted weak blue and intense ultraviolet light. Especially, unusual 3P2 → 3H6 (∼265 nm) and
Publikováno v:
Journal of Fluorine Chemistry. 129:1110-1113
The upconversion luminescent properties of YF 3 :Yb 3+ (20%)/Tm 3+ (1%) nanobundles with different sizes (240–500 nm in length) were studied under 980-nm excitation. Ultraviolet ( 1 I 6 → 3 F 4 / 3 H 6 and 1 D 2 → 3 H 6 ), blue ( 1 D 2 → 3 F