This article is a concise overview about the developing microfluidic systems named surface-tension-confined droplet microfluidics (STORMs). Different from traditional complexed droplet microfluidics which generated ...This article is a concise overview about the developing microfluidic systems named surface-tension-confined droplet microfluidics (STORMs). Different from traditional complexed droplet microfluidics which generated and confined the droplets by three-dimensional (3D) poly(dimethylsiloxane)-based microchannels, STORM systems provide two- dimensional (2D) platforms for control of droplets. STORM devices utilize surface energy, with methods such as surface chemical modification and mechanical processing, to control the movement of fluid droplets. Various STORM devices have been readily prepared, with distinct advantages over conventional droplet microfluidics, which generated and confined the droplets by 3D poly(dimethylsiloxane)-based microchannels, such as significant reduction of energy consumption neces- sary for device operation, facile or even direct introduction of droplets onto patterned surface without external driving force such as a micropump, thus increased frequency or efficiency of droplets generation of specific STORM device, among others. Thus, STORM devices can be excellent alternatives for majority areas in droplet microfluidics and irreplaceable choices in certain fields by contrast. In this review, fabrication methods or strategies, manipulation methods or mechanisms, and main applications of STORM devices are introduced.展开更多
在电流变液发明后的70余年中,学者们相继提出了纤维理论、"水桥"理论、双电层理论和介电理论等传统理论模型.然而,力学性能较差,严重制约了电流变液的工程化应用.近几年,随着巨电流变液和极性型电流变液等低场高屈服强度的新...在电流变液发明后的70余年中,学者们相继提出了纤维理论、"水桥"理论、双电层理论和介电理论等传统理论模型.然而,力学性能较差,严重制约了电流变液的工程化应用.近几年,随着巨电流变液和极性型电流变液等低场高屈服强度的新型电流变液的发明,电流变液屈服强度均超过了100 k Pa,电流变液迎来了一个新的工业化应用契机.但是,电流变液的沉降性及再分散性等基础性和应用性问题仍然制约了其广泛应用.本文回顾了电流变液的成分、宏观性质、微观机制及其应用的发展,重点分析了巨电流变效应及其在智能微流控中的研究.总结了电流变液的研究现状及未来发展方向,其中对电流变液稳定性和服役与失效的研究将成为未来研究的主要方向.随着上述问题的解决完善将加速电流变液的工业化进程.展开更多
基金Project supported by the Shanghai Pujiang Program(Grant No.16PJ1403200)the Research Grant(Grant No.16DZ2260601)from Science and Technology Commission of Shanghai Municipality
文摘This article is a concise overview about the developing microfluidic systems named surface-tension-confined droplet microfluidics (STORMs). Different from traditional complexed droplet microfluidics which generated and confined the droplets by three-dimensional (3D) poly(dimethylsiloxane)-based microchannels, STORM systems provide two- dimensional (2D) platforms for control of droplets. STORM devices utilize surface energy, with methods such as surface chemical modification and mechanical processing, to control the movement of fluid droplets. Various STORM devices have been readily prepared, with distinct advantages over conventional droplet microfluidics, which generated and confined the droplets by 3D poly(dimethylsiloxane)-based microchannels, such as significant reduction of energy consumption neces- sary for device operation, facile or even direct introduction of droplets onto patterned surface without external driving force such as a micropump, thus increased frequency or efficiency of droplets generation of specific STORM device, among others. Thus, STORM devices can be excellent alternatives for majority areas in droplet microfluidics and irreplaceable choices in certain fields by contrast. In this review, fabrication methods or strategies, manipulation methods or mechanisms, and main applications of STORM devices are introduced.
文摘在电流变液发明后的70余年中,学者们相继提出了纤维理论、"水桥"理论、双电层理论和介电理论等传统理论模型.然而,力学性能较差,严重制约了电流变液的工程化应用.近几年,随着巨电流变液和极性型电流变液等低场高屈服强度的新型电流变液的发明,电流变液屈服强度均超过了100 k Pa,电流变液迎来了一个新的工业化应用契机.但是,电流变液的沉降性及再分散性等基础性和应用性问题仍然制约了其广泛应用.本文回顾了电流变液的成分、宏观性质、微观机制及其应用的发展,重点分析了巨电流变效应及其在智能微流控中的研究.总结了电流变液的研究现状及未来发展方向,其中对电流变液稳定性和服役与失效的研究将成为未来研究的主要方向.随着上述问题的解决完善将加速电流变液的工业化进程.