2021.0927
Fruitful Discussion at the 25th Global Chinese Conference on Computers in Education
The 25th Global Chinese Conference on Computers in Education (GCCCE 2021) organized by The Education University of Hong Kong, Beijing Normal University, Taiwan Normal University and National Institute of Education, Nanyang Technological University in blended mode on 11 - 15 September 2021.
2021.0924
Association of hearing loss with dementia
In this study, HL was positively associated with dementia occurrence, especially in patients aged 45-64 years. Therefore, early hearing care, screening, and hearing aid use could be strategies to reduce dementia incidence.
2021.0921
Transformers in The Porous Materials Field: Extremely Fast Lattice Rearrangement of the MOF Structures
In this work, we present a case system that can achieve rapid structural rearrangement of the whole lattice of a metal–organic framework (MOF) through a ‘domino’ alteration of the bond connectivity under mild conditions. Topological transitions between significantly different phases typically require extreme conditions to collectively break chemical bonds and overcome the stress caused to the original structure by altering its correlated bond environment. Our system transforms from a disordered and less crystalline MOF with low porosity to a highly crystalline and porous isomer within few minutes upon activation (solvent exchange and desorption), resulting in a significant increase in surface area, from 725 to 2,749 m2/g. Spectroscopic measurements show that this counter-intuitive lattice rearrangement involves a metastable intermediate with defect frameworks that results from solvent removal on coordinately unsaturated metal sites. This less crystalline–crystalline switch between two topological distinct MOFs is shown to be reversible over four cycles through activation and re-immersion in polar solvents. The aim of this study was to investigate the partial defects in real MOF crystalline structures and to focus on defect-induced MOF properties, which are expected to enhance and develop the physical, mechanical, electronic and optical material properties and chemical activities of MOF materials. This research adopted an exploratory experimental procedure that facilitated the synthesis of highly porous MOFs, which were previously not easy to synthesize, and functional applications for defective and highly porous MOFs were further developed.
2021.0909
COVID-19 Campus Access Control Protocol (Sept. 10 - Oct. 12)
Campus entry access control will be enforced from 08:00 to 18:00 on working days: Real-name system is in place. You are only allowed to enter if you have a Day Pass, scan QR code at the gates, present an NTU System School ID or a proof of business visit and pass the temperature check.
2021.0909