نتایج جستجو برای: sio2 membrane

تعداد نتایج: 402821  

2008
Jian Liu Chunrui Wang Guangping Ren Xiaofeng Xu Juan Wang

The novel SiO2 net-like nanobelts have been successfully fabricated on Au-coated Si substrates by a simple thermal evaporation of CdS powder. The as-synthesized SiO2 nanostructures were characterized by using scanning electron microscope (SEM), transmission electron microscope (TEM) and energy dispersive spectroscopy (EDS), respectively. The as-grown SiO2 net-like nanobelts are rather uniformly...

2004
Eleftheria Neofotistou Konstantinos D. Demadis

This paper reports the inhibition efficiency of a family of polyaminoamide (PAMAM) STARBURST® dendrimers in colloidal SiO2 growth. PAMAMs of various generations (0.5, 1.5, 2.5 with –COOH termini, and 1, and 2 with –NH2 termini) were tested and compared to control samples. Superiority of the dendrimer inhibitors with –NH2 termini (maintaining∼380 ppm soluble SiO2 after 12 h) versus those with –C...

2010
Ji-Hun Yu Jai-Sung Lee Yong-Ho Choa Heinrich Hofmann

SiO2 coated γ-Fe2O3 nanocomposite powder has been successfully synthesized by chemical vapor condensation process and its feasibility on hyperthermic application was investigated in this study. The power loss of SiO2 coated γ-Fe2O3 nanocomposite powder which means the magnetic heating effect under alternative magnetic field was much higher than the single phase γ-Fe2O3 nano powder due to the ve...

Journal: :journal of the iranian chemical research 0
bi bi fatemeh mirjalili department of chemistry, college of science, yazd university, yazd, iran esmat mohammadnejad 1department of chemistry, college of science, yazd university, yazd, iran abdolhamid bamoniri department of organic chemistry, faculty of chemistry, university of kashan, kashan, iran

nano-sbcl5.sio2 and sbcl5.sio2 are bench-top catalysts which are reusable, readily available, versatile andefficient for promotion of many acid catalyzed organic reactions. these catalysts do not need specialprecautions for preparation, handling or storage, and they can be stored at an ambient temperature for monthswithout losing their catalytic activity. 4-dihydropyrimidin-2(1h)-ones(thiones) ...

Journal: :Optics letters 2012
Tsan-Wen Lu Pin-Tso Lin Po-Tsung Lee

We theoretically propose and investigate a TM-polarized one-dimensional photonic crystal nanocavity with a horizontal SiO2 slot on a suspended silicon nanobeam via the three-dimensional finite-element method. The ultrahigh quality factor and ultrasmall effective mode volume of 1.5×10(7) and 0.176 half-wavelength cubic of the horizontally SiO2-slotted nanocavity show strong possibilities for rea...

2003
Emily A. A. Jarvis Emily A. Carter

We employ first-principles density functional calculations to explore atomic-level interactions and predict the ideal work of adhesion at the SiO2/nickel and ZrO2/SiO2 interfaces. We find that chemical bonding at the interface serves to strengthen significantly interfaces formed with SiO2, which exhibits significant covalent bonding character, relative to those formed using more ionic oxides, s...

Journal: :eScience 2022

Using inorganic fibrous membranes as protective layers has yielded success in suppressing dendrite growth. However, conventional usually have large voids and low affinity for Li, promoting inhomogeneous charge distribution allowing some dendrites to grow. Herein, we introduce a highly aligned TiO2/SiO2 (A-TS) electrospun nanofiber membrane layer the Li metal anode. The A-TS is fabricated by cus...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه گیلان - دانشکده کشاورزی 1391

تغذیه ی مطلوب گیاه تأثیر چشمگیری بر مقدار و کیفیت عملکرد آن دارد. نیتروژن جزء عناصر ضروری برای رشد گیاهان محسوب شده و از مهم ترین عناصر غذایی محدود کننده در تولید برنج می باشد. سیلیسیم به عنوان یک عنصر ضروری برای رشد و نمو گیاه محسوب نمی شود اما از یک سو برای رشد و عملکرد برنج مورد نیاز است و از سوی دیگر موجب کاهش اثرات زیانبار ناشی از تنش های طبیعی و غیرطبیعی می شود. به منظور بررسی اثر برهمکنش...

2016
Yanjing Zhu Rongrong Zhu Mei Wang Bin Wu Xiaolie He Yechang Qian Shilong Wang

Currently, nanoparticles have gained a great attention in the anti-tumor research area. However, to date, studies on the anti-metastasis action of core-shell SiO2@LDH (LDH: layered double hydroxide) nanoparticles remain untouched. Two emerging aspects considered are establishing research on the controlling delivery effect of SiO2@LDH combined with anti-cancer medicine from a new perspective. Th...

2009
A. Teleki M. Suter P. R. Kidambi O. Ergeneman F. Krumeich B. J. Nelson S. E. Pratsinis

Magnetic nanoparticles are frequently coated with SiO2 to improve their functionality and bio-compatibility in a range of biomedical and polymer nanocomposite applications. In this paper, a scalable flame aerosol technology is used to produce highly dispersible, superparamagnetic iron oxide nanoparticles hermetically coated with silica to retain full magnetization performance. Iron oxide partic...

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