Magnetically responsive microstructured functional surface(MRMFS),capable of dynamically and reversibly switching the surface topography under magnetic actuation,provides a wireless,noninvasive,and instantaneous way t...Magnetically responsive microstructured functional surface(MRMFS),capable of dynamically and reversibly switching the surface topography under magnetic actuation,provides a wireless,noninvasive,and instantaneous way to accurately control the microscale engineered surface.In the last decade,many studies have been conducted to design and optimize MRMFSs for diverse applications,and significant progress has been accomplished.This review comprehensively presents recent advancements and the potential prospects in MRMFSs.We first classify MRMFSs into one-dimensional linear array MRMFSs,two-dimensional planar array MRMFSs,and dynamic self-assembly MRMFSs based on their morphology.Subsequently,an overview of three deformation mechanisms,including magnetically actuated bending deformation,magnetically driven rotational deformation,and magnetically induced self-assembly deformation,are provided.Four main fabrication strategies employed to create MRMFSs are summarized,including replica molding,magnetization-induced self-assembly,laser cutting,and ferrofluid-infused method.Furthermore,the applications of MRMFS in droplet manipulation,solid transport,information encryption,light manipulation,triboelectric nanogenerators,and soft robotics are presented.Finally,the challenges that limit the practical applications of MRMFSs are discussed,and the future development of MRMFSs is proposed.展开更多
Radio frequency(RF)heating is usually used to control insects while maintaining the quality of harvested grains.Different packaging conditions may influence RF heating uniformity,insecticidal efficacy,product quality,...Radio frequency(RF)heating is usually used to control insects while maintaining the quality of harvested grains.Different packaging conditions may influence RF heating uniformity,insecticidal efficacy,product quality,and energy efficiency.An RF unit was used for conducting thermal treatments to evaluate the heating uniformity,the mortality of Rhizopathy dominica,the main quality attributes of mung beans under four packaging conditions,and the energy efficiency.The results show that after the aluminum foil sheet was added at the top or bottom side of bags,the RF heating uniformity was improved.The mortality of Rhizopathy dominica in mung beans was 100%for vacuum-packaged bags added with aluminum sheets on the bottom side and ordinarily sealed bags.The fastest cooling rate was observed in vacuum-packaged bags with aluminum foil sheets added at the top side.The energy efficiency of the RF system for treating mung beans in Packaging A,B,C,and D were 54.8%,56.0%,53.6%,and 54.8%,respectively.The effective RF treatment protocol was developed using vacuum-packaged bags with aluminum sheets added at the bottom side,54℃hot air assisted RF treatment under an electrode gap of 13.5 cm for 5 min,holding for 6 min,and placing bags upward for cooling.The suitable packaging condition could be explored for developing practical RF disinfestation treatments.展开更多
基金financially supported by the Shenzhen Science and Technology Project(Project Nos.JCYJ20220818102201003,JCYJ20220818100001002)the Shenzhen Sustainable Development Special Project(Project No.KCXFZ20230731094500001)+1 种基金the National Natural Science Foundation of China(Project Nos.51975597,52175446)the Natural Science Foundation of Guangdong Province(Project No.2022B1515020011)。
文摘Magnetically responsive microstructured functional surface(MRMFS),capable of dynamically and reversibly switching the surface topography under magnetic actuation,provides a wireless,noninvasive,and instantaneous way to accurately control the microscale engineered surface.In the last decade,many studies have been conducted to design and optimize MRMFSs for diverse applications,and significant progress has been accomplished.This review comprehensively presents recent advancements and the potential prospects in MRMFSs.We first classify MRMFSs into one-dimensional linear array MRMFSs,two-dimensional planar array MRMFSs,and dynamic self-assembly MRMFSs based on their morphology.Subsequently,an overview of three deformation mechanisms,including magnetically actuated bending deformation,magnetically driven rotational deformation,and magnetically induced self-assembly deformation,are provided.Four main fabrication strategies employed to create MRMFSs are summarized,including replica molding,magnetization-induced self-assembly,laser cutting,and ferrofluid-infused method.Furthermore,the applications of MRMFS in droplet manipulation,solid transport,information encryption,light manipulation,triboelectric nanogenerators,and soft robotics are presented.Finally,the challenges that limit the practical applications of MRMFSs are discussed,and the future development of MRMFSs is proposed.
基金financially supported by the College of Mechanical and Electronic Engineering,Northwest A&F Universitysupported by grants from the Key Research and Development Program in Shaanxi Province of China(Grant No.2020NY-124,2021NY-135)the Science and Technology Program in Yulin City of China(Grant No.CXY-2019-129,CXY-2020-076).
文摘Radio frequency(RF)heating is usually used to control insects while maintaining the quality of harvested grains.Different packaging conditions may influence RF heating uniformity,insecticidal efficacy,product quality,and energy efficiency.An RF unit was used for conducting thermal treatments to evaluate the heating uniformity,the mortality of Rhizopathy dominica,the main quality attributes of mung beans under four packaging conditions,and the energy efficiency.The results show that after the aluminum foil sheet was added at the top or bottom side of bags,the RF heating uniformity was improved.The mortality of Rhizopathy dominica in mung beans was 100%for vacuum-packaged bags added with aluminum sheets on the bottom side and ordinarily sealed bags.The fastest cooling rate was observed in vacuum-packaged bags with aluminum foil sheets added at the top side.The energy efficiency of the RF system for treating mung beans in Packaging A,B,C,and D were 54.8%,56.0%,53.6%,and 54.8%,respectively.The effective RF treatment protocol was developed using vacuum-packaged bags with aluminum sheets added at the bottom side,54℃hot air assisted RF treatment under an electrode gap of 13.5 cm for 5 min,holding for 6 min,and placing bags upward for cooling.The suitable packaging condition could be explored for developing practical RF disinfestation treatments.
