Fluorine-containing salts not only serve as common counterions for nanoclusters but also interact with cluster molecules,potentially driving their structural transformation.In this work,we successfully achieved the hi...Fluorine-containing salts not only serve as common counterions for nanoclusters but also interact with cluster molecules,potentially driving their structural transformation.In this work,we successfully achieved the highly efficient size transformation from Cu_(8)to Cu_(11)nanoclusters using fluorine-containing counterion salts(NaSbF_(6))as catalysts.Multiple characterization studies,including optical spectroscopy,ESI-MS,and^(19)F NMR,were employed to monitor the cluster transformation.The results indicate that the direct interaction between SbF_(6)^(-)counterions and Cu_(8)nanoclusters is the main driving force behind the size transformation.More importantly,ESI-MS revealed the formation of(Cu_(4))(SbF_(6)^(-))_(y)(Na^(+))_(y)(y≥6)colloidal particles as intermediate products during the transformation.This work provides new insights into the interactions between fluorine-containing salts and nanoclusters.展开更多
This paper presents a thin-film,three-dimensional(3D)opto-electro array featuring four addressable microscale light-emitting diodes(LEDs)for surface cortex illumination and nine penetrating electrodes for simultaneous...This paper presents a thin-film,three-dimensional(3D)opto-electro array featuring four addressable microscale light-emitting diodes(LEDs)for surface cortex illumination and nine penetrating electrodes for simultaneous recording of light-evoked neural activities.Inspired by the origami concept,we have developed a meticulously designed“bridge+trench”structure that facilitates the transformation of the array from 2D to 3D while preventing damage to the thin film metal.Prior to device transformation,the shape and dimensions of the 2D array can be customized,enhancing its versatility for various applications.In addition,the arched base offers strong mechanical support to facilitate the direct insertion of the probe into tissue without any mechanical reinforcement.The array was encapsulated using polyimide and epoxy to ensure mechanical flexibility and biocompatibility of the device.The efficacy of the device was evaluated through comprehensive in vitro and in vivo characterization.展开更多
Metal-organic frameworks(MOFs)have been widely considered as ideal platforms for the preparation of biomimetic catalysts,but it remains challenging to fabricate MOF-based enzyme-like catalysts with optimal activity.He...Metal-organic frameworks(MOFs)have been widely considered as ideal platforms for the preparation of biomimetic catalysts,but it remains challenging to fabricate MOF-based enzyme-like catalysts with optimal activity.Here,we leverage the inherent flexibility of MOFs and propose a novel trans-functionalization strategy to construct a carbonic anhydrase(CA)mimic by the structural transformation from ZIF-L to ZIF-8.Theoretical and experimental results reveal that during the structural transformation,the hydroxyl group will preferentially coordinate with the interlayer Zn clusters to form the CA-like active center Zn-N3-OH.Therefore,more accessible active centers are generated on the as-prepared ZIF-8-OH,resulting in substantially enhanced catalytic activity in the hydrolysis of para-nitrophenyl acetate.展开更多
基金financial support of the NSFC(22401003,22371003,22101001 and 22471001)the Ministry of Education,Natural Science Foundation of Anhui Province(2408085Y006)+2 种基金the Scientific Research Program of Universities in Anhui Province(2022AH030009 and 2023AH030038)the Scientific Research Startup Foundation of Anhui Jianzhu University(2023QDZ28)the Director Fund of Anhui Advanced Building Materials Engineering Laboratory(JZCL2409ZR).
文摘Fluorine-containing salts not only serve as common counterions for nanoclusters but also interact with cluster molecules,potentially driving their structural transformation.In this work,we successfully achieved the highly efficient size transformation from Cu_(8)to Cu_(11)nanoclusters using fluorine-containing counterion salts(NaSbF_(6))as catalysts.Multiple characterization studies,including optical spectroscopy,ESI-MS,and^(19)F NMR,were employed to monitor the cluster transformation.The results indicate that the direct interaction between SbF_(6)^(-)counterions and Cu_(8)nanoclusters is the main driving force behind the size transformation.More importantly,ESI-MS revealed the formation of(Cu_(4))(SbF_(6)^(-))_(y)(Na^(+))_(y)(y≥6)colloidal particles as intermediate products during the transformation.This work provides new insights into the interactions between fluorine-containing salts and nanoclusters.
基金supported by the National Science Foundation under award numbers ECCS-2024270.
文摘This paper presents a thin-film,three-dimensional(3D)opto-electro array featuring four addressable microscale light-emitting diodes(LEDs)for surface cortex illumination and nine penetrating electrodes for simultaneous recording of light-evoked neural activities.Inspired by the origami concept,we have developed a meticulously designed“bridge+trench”structure that facilitates the transformation of the array from 2D to 3D while preventing damage to the thin film metal.Prior to device transformation,the shape and dimensions of the 2D array can be customized,enhancing its versatility for various applications.In addition,the arched base offers strong mechanical support to facilitate the direct insertion of the probe into tissue without any mechanical reinforcement.The array was encapsulated using polyimide and epoxy to ensure mechanical flexibility and biocompatibility of the device.The efficacy of the device was evaluated through comprehensive in vitro and in vivo characterization.
基金supported by the National Natural Science Foundation of China(62288102,22305116,21908105,21727808,and 21971114)the Jiangsu Provincial Funds for Natural Science Foundation(BK20230308 and BK20200090).
文摘Metal-organic frameworks(MOFs)have been widely considered as ideal platforms for the preparation of biomimetic catalysts,but it remains challenging to fabricate MOF-based enzyme-like catalysts with optimal activity.Here,we leverage the inherent flexibility of MOFs and propose a novel trans-functionalization strategy to construct a carbonic anhydrase(CA)mimic by the structural transformation from ZIF-L to ZIF-8.Theoretical and experimental results reveal that during the structural transformation,the hydroxyl group will preferentially coordinate with the interlayer Zn clusters to form the CA-like active center Zn-N3-OH.Therefore,more accessible active centers are generated on the as-prepared ZIF-8-OH,resulting in substantially enhanced catalytic activity in the hydrolysis of para-nitrophenyl acetate.
