Optical sensors are widely used in the field of analytical sensing and optical imaging because of their high sensitivity, fast response time, and technical simplicity. The advantages of sensors lay in their non- invas...Optical sensors are widely used in the field of analytical sensing and optical imaging because of their high sensitivity, fast response time, and technical simplicity. The advantages of sensors lay in their non- invasive approach within biological tissues and inherent reliability in fluorescence imaging tests. In recent years the development of optical sensors for the sensing of ions, neutral molecules and especially tumor micro-environment-related parameters has been an active research area. This review focuses on recent contributions concerning fluorescent or colorimetric sensors and is organized according to their target classifications.展开更多
Quantum mechanical molecular dynamics simulations show that electrically neutral carbon nanotubes or fullerene balls housed in an outer carbon nanotube can be driven into motion by charging the outer tube uniformly.Po...Quantum mechanical molecular dynamics simulations show that electrically neutral carbon nanotubes or fullerene balls housed in an outer carbon nanotube can be driven into motion by charging the outer tube uniformly.Positively and negatively charged outer tube are found to have quite different actions on the initially neutral nanotubes or fullerene balls.A positively charged tube can drive out the molecule inside it out at speeds over 1 km/s,just like a“nanogun”,while a negatively charged tube can drive the molecule into oscillation inside it and can absorb inwards a neutral molecule in the vicinity of its open end,like a“nano-manipulator”.The results demonstrate that changing the charge environment in specifi c ways may open the door to conceptually new nano/molecular electromechanical devices.展开更多
基金supported by the National Natural Science Foundation of China (Nos. 21462050 and 21672185)the Foundation of the Department of Science and Technology of Yunnan Province of China (No. 2016FB020)the Program for Excellent Youth Talents (No. C6176102), Yunnan University
文摘Optical sensors are widely used in the field of analytical sensing and optical imaging because of their high sensitivity, fast response time, and technical simplicity. The advantages of sensors lay in their non- invasive approach within biological tissues and inherent reliability in fluorescence imaging tests. In recent years the development of optical sensors for the sensing of ions, neutral molecules and especially tumor micro-environment-related parameters has been an active research area. This review focuses on recent contributions concerning fluorescent or colorimetric sensors and is organized according to their target classifications.
基金by the 973 Program(2007 CB936204)the Ministry of Education(No.705021,IRT0534)NSF(10732040)of China.
文摘Quantum mechanical molecular dynamics simulations show that electrically neutral carbon nanotubes or fullerene balls housed in an outer carbon nanotube can be driven into motion by charging the outer tube uniformly.Positively and negatively charged outer tube are found to have quite different actions on the initially neutral nanotubes or fullerene balls.A positively charged tube can drive out the molecule inside it out at speeds over 1 km/s,just like a“nanogun”,while a negatively charged tube can drive the molecule into oscillation inside it and can absorb inwards a neutral molecule in the vicinity of its open end,like a“nano-manipulator”.The results demonstrate that changing the charge environment in specifi c ways may open the door to conceptually new nano/molecular electromechanical devices.
