image: Comparison of the traditional approach for preparation of bulk MOF crystal (top) and metal hydroxide nanostructure precursor approach for synthesis of ultrathin MOF nanoribbon (bottom). view more
Credit: ©Science China Press
Metal-organic frameworks (MOFs) have attracted great attentions in the past decades due to their many noticeable features, such as large surface areas, highly ordered pores, tunable structures and unique functions, making them promising for many promising applications. The structure engineering of MOFs at the nanometer scale is essential to customize MOFs for specific applications.
Among various nanostructures, ultrathin nanoribbons (NRBs) show great potentials in both fundamental studies and technological applications. Their unique features like high surface-to-volume ratio, highly active surface, and high concentration of selectively exposed crystal facet enable them to exhibit unique electronic structures, mechanical properties, and excellent catalytic efficiency. However, so far, the preparation of ultrathin MOF NRBs still remains a great challenge due to the complicated nucleation and growth processes of MOFs.
In a new research article published in the National Science Review, the scientists at Nanyang Technological University, City University of Hong Kong and Beijing University of Chemical Technology present a general method to prepare ultrathin MOF NRBs by using the metal hydroxide nanostructures as precursors. They found that metal hydroxide nanostructures used as precursors can regulate the growth of MOF crystals by controlled releasing metal ions from the metal hydroxides, which plays a key role in the synthesis of MOF NRBs. Importantly, the proposed method is simple, efficient and versatile, which could be used for the preparation of a series of ultrathin MOF NRBs. As a proof-of-concept application, the as-prepared ultrathin NRBs were used in DNA detection, exhibiting excellent sensitivity and selectivity.
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See the article:
Bingqing Wang, Meiting Zhao, Liuxiao Li, Ying Huang, Xiao Zhang, Chong Guo, Zhicheng Zhang, Hongfei Cheng, Wenxian Liu, Jing Shang, Jing Jin, Xiaoming Sun, Junfeng Liu, and Hua Zhang
Ultrathin Metal-Organic Framework Nanoribbons
Natl Sci Rev (August 2019) doi: 10.1093/nsr/nwz118
https://doi.org/10.1093/nsr/nwz118
The National Science Review is the first comprehensive scholarly journal released in English in China that is aimed at linking the country's rapidly advancing community of scientists with the global frontiers of science and technology. The journal also aims to shine a worldwide spotlight on scientific research advances across China.
Journal
National Science Review