نتایج جستجو برای: zif 67

تعداد نتایج: 71974  

2015
Haizhou Yu Xiaoyan Qiu Pradeep Neelakanda Lin Deng Niveen M. Khashab Suzana P. Nunes Klaus-Viktor Peinemann

Recently two quite different types of "nano-containers" have been recognized as attractive potential drug carriers; these are wormlike filamenteous micelles ("filomicelles") on the one hand and metal organic frameworks on the other hand. In this work we combine these two concepts. We report for the first time the manufacturing of metal organic framework nanotubes with a hollow core. These worm-...

2008
Yufeng Lu Jun Yang Stevo Stevic

Received 13 June 2008; Revised 12 October 2008; Accepted 20 November 2008 Recommended by Stevo Stevic This paper shows that if S is a bounded linear operator acting on the weighted Bergman spaces Aα on the unit ball in C n such that STzi TziS i 1, . . . , n , where Tzi zif and Tzi P zif ; and where P is the weighted Bergman projection, then S must be a Hankel operator. Copyright q 2008 Y. Lu an...

2012
Yongha Hwang Anh Phan Kosmas Galatsis Omar M. Yaghi Rob N. Candler

We introduce for the first time a zeolitic imidazolate framework (ZIF)-coupled resonant gas sensor whose sensitivity shows an improvement up to 78 times over silicon resonant sensors with identical dimensions while additionally utilizing the inherently selective adsorption properties of ZIFs. In order to achieve high sensitivities, a resonator needs to have a high surface-to-volume ratio. In th...

2015
Janine dos Santos Ferreira da Silva Daniel López Malo Giovana Anceski Bataglion Marcos Nogueira Eberlin Célia Machado Ronconi Severino Alves Júnior Gilberto Fernandes de Sá Andrew C Singer

A metal-organic framework, Zn-[2-methylimidazolate] frameworks (ZIF-8), was used as adsorbent material to remove different concentrations of oxytetracycline (OTC) antibiotic in a fixed-bed column. The OTC was studied at concentrations of 10, 25 and 40 mg L(-1). At 40 mg L(-1), the breakthrough point was reached after approximately 10 minutes, while at 10 and 25 mg L(-1) this point was reached i...

Journal: :Dalton transactions 2016
Tian Tian Michael T Wharmby José B Parra Conchi O Ania David Fairen-Jimenez

The flexibility and structure transition behaviour of ZIF-8 in a series of samples with different particle size has been studied using a combination of high-resolution N2 gas adsorption isotherms and, for the first time, a broad in situ PXRD and Rietveld analysis. During the stepped adsorption process, large particles showed a narrow adsorption/desorption pressure range with a shorter equilibri...

Journal: :The journal of physical chemistry letters 2013
Vinay I Hegde Jin-Chong Tan Umesh V Waghmare Anthony K Cheetham

We determine the nonlinear mechanical behavior of a prototypical zeolitic imidazolate framework (ZIF-8) along two modes of mechanical failure in response to tensile and shear forces using first-principles simulations. Our generalized stacking fault energy surface reveals an intrinsic stacking fault of surprisingly low energy comparable to that in copper, though the energy barrier associated wit...

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