نتایج جستجو برای: hydrothermal process

تعداد نتایج: 1326923  

2015
Peiyu Qiu Rongjin Sun Guo Gao Chunlei Zhang Bin Chen Naishun Yan Ting Yin Yanlei Liu Jingjing Zhang Yao Yang Daxiang Cui

Rare-earth (RE)-doped upconversion nanocrystals (UCNCs) are deemed as the promising candidates of luminescent nanoprobe for biological imaging and labeling. A number of methods have been used for the fabrication of UCNCs, but their assembly into porous architectures with desired size, shape and crystallographic phase remains a long-term challenging task. Here we report a facile, anion-induced h...

2015
Ru Chen Lei Miao Chengyan Liu Jianhua Zhou Haoliang Cheng Toru Asaka Yuji Iwamoto Sakae Tanemura

Monoclinic VO2(M) in nanostructure is a prototype material for interpreting correlation effects in solids with fully reversible phase transition and for the advanced applications to smart devices. Here, we report a facile one-step hydrothermal method for the controlled growth of single crystalline VO2(M/R) nanorods. Through tuning the hydrothermal temperature, duration of the hydrothermal time ...

Journal: :Nanoscale 2010
Min Liu Lingyu Piao Weiming Lu Siting Ju Lei Zhao Chunlan Zhou Hailing Li Wenjing Wang

Flower-like TiO(2) nanostructures with exposed {001} facets were synthesized by a low-temperature hydrothermal process from Ti powders for the first time, and they exhibited enhanced photocatalytic degradation of methylene blue dye under ultraviolet light irradiation.

2012
Shujie Wang Chongshun Song Ke Cheng Shuxi Dai Yayan Zhang Zuliang Du

Since the photoelectric response and charge carriers transport can be influenced greatly by the density and spacing of the ZnO nanorod arrays, controlling of these geometric parameters precisely is highly desirable but rather challenging in practice. Here, we fabricated patterned ZnO nanorod arrays with different densities and spacing distances on silicon (Si) substrate by electron beam lithogr...

2017
Jing-Jing Dong Jian Wu Hui-Ying Hao Jie Xing Hao Liu Hua Gao

Controllable synthesis of various ZnO nanocrystals was achieved via a simple and cost-effective hydrothermal process. The morphology evolution of the ZnO nanostructures was well monitored by tuning hydrothermal growth parameters, such as solution concentration, reaction temperature, and surfactant. As-obtained ZnO nanocrystals with different morphologies, e.g., ZnO nanorods, nanotetrapods, nano...

2013
Jing-Jing Dong Chun-Yang Zhen Hui-Ying Hao Jie Xing Zi-Li Zhang Zhi-Yuan Zheng Xing-Wang Zhang

In this paper, controllable synthesis of various ZnO nanostructures was achieved via a simple and cost-effective hydrothermal process on the Si substrate. The morphology evolution of the ZnO nanostructures was well monitored by tuning hydrothermal growth parameters, such as the seed layer, solution concentration, reaction temperature, and surfactant. X-ray diffraction and photoluminescence meas...

Journal: :Journal of nanoscience and nanotechnology 2008
A Escobedo Morales U Pal M Herrera Zaldivar

Incorporation of dopants in optoelectronic semiconductor nanostructures has been a matter of great interest in recent times. While such doping has been performed almost routinely using physical methods, use of low-cost chemical techniques for that purpose is still rare. We incorporated antimony in zinc oxide (ZnO) nanostructures through a low temperature hydrothermal method. In as-grown nanostr...

Journal: :Entropy 2017
Doreen Niether Simone Wiegand

One of the central questions of humankind is: which chemical and physical conditions are necessary to make life possible? In this “origin-of-life” context, formamide plays an important role, because it has been demonstrated that prebiotic molecules can be synthesized from concentrated formamide solutions. Recently, it could be shown, using finite-element calculations combining thermophoresis an...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تبریز - دانشکده علوم طبیعی 1387

چکیده ندارد.

2017
Jin Heui Koo Byeong Woo Lee

Zinc oxide (ZnO) powders were synthesized by a simple hydrothermal process in the temperature range of 50 to 100 C. Nanocrystallites were formed by a simple hydrothermal route from aqueous solutions of zinc nitrate hexahydrate (Zn(NO3)2·6H2O) and NaOH under controlled process conditions such as precursor concentration (0.07 to 1 mol/L), reaction pH (7 to 11) and temperatures. Single phase ZnO p...

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