Surface-enhanced Raman scattering(SERS)has been widely used in various fields due to high sensitivity,but it is hindered by its low repeatability.Here,we explored a highly reproducible free-standing liquid-state platf...Surface-enhanced Raman scattering(SERS)has been widely used in various fields due to high sensitivity,but it is hindered by its low repeatability.Here,we explored a highly reproducible free-standing liquid-state platform(FSM)for monitoring norfloxacin(NOR)in the environmental field.After optimizing the types of nanoparticles(NPs)and pH value in NOR solution,the relative standard deviation(RSD)of FSM SERS analysis can be stabilized below 10%(n≥8),and the R^(2)of the calibration curve in the range of 20μg/L-100μg/L was 0.995.In addition,the results showed that the limit of detection(LOD)(3σ/k)of NOR was 1.3μg/L.Moreover,the NOR in the spiked samples was successfully quantified by FSM,and the recovery rate exceeded 95%.The proposed method has the potential for rapid analysis of drug residues in environmental samples.展开更多
The understanding of the photolysis process of 2,2’,4,4’,6,6’-hexanitrostillbene(HNS,an insensitive high-energy explosive)is very important not only for enhancing the detonation performance but also for its lifetim...The understanding of the photolysis process of 2,2’,4,4’,6,6’-hexanitrostillbene(HNS,an insensitive high-energy explosive)is very important not only for enhancing the detonation performance but also for its lifetime prediction.In this work,UV-Vis light-induced photolysis of nano HNS was studied by different spectroscopic methods.Nano HNS was found to be sensitive to UV-Vis lights at 365 and 470 nm.The photolysis route of nano HNS was mostly the same as its bulk counterpart,which was likely to be the combination of the isomerization of-NO_(2)to-ONO and the breaking of the C-N bond in Ar-NO_(2)(Ar=Aromatic ring).In addition,the possible mechanism of UV-Vis-induced visible color change was explored for the first time.展开更多
Resonance exists very commonly ranging from elementary particles to large celestial bodies,creating variety of new things and phenomena.As a typical forced vibration,resonance makes a physical system to absorb more en...Resonance exists very commonly ranging from elementary particles to large celestial bodies,creating variety of new things and phenomena.As a typical forced vibration,resonance makes a physical system to absorb more energy from the surrounding environment at its natural vibration frequency,leading up to enhancement eff ect and bringing new opportunities to improve sensitivity in analytical chemistry.展开更多
基金financially supported of the National Natural Science Foundation of China(22006121,22076153)Sichuan Science and Technology Program(2020YFH0048)
文摘Surface-enhanced Raman scattering(SERS)has been widely used in various fields due to high sensitivity,but it is hindered by its low repeatability.Here,we explored a highly reproducible free-standing liquid-state platform(FSM)for monitoring norfloxacin(NOR)in the environmental field.After optimizing the types of nanoparticles(NPs)and pH value in NOR solution,the relative standard deviation(RSD)of FSM SERS analysis can be stabilized below 10%(n≥8),and the R^(2)of the calibration curve in the range of 20μg/L-100μg/L was 0.995.In addition,the results showed that the limit of detection(LOD)(3σ/k)of NOR was 1.3μg/L.Moreover,the NOR in the spiked samples was successfully quantified by FSM,and the recovery rate exceeded 95%.The proposed method has the potential for rapid analysis of drug residues in environmental samples.
基金financially supported by National Natural Science Foundation of China(22006121,21677117)
文摘The understanding of the photolysis process of 2,2’,4,4’,6,6’-hexanitrostillbene(HNS,an insensitive high-energy explosive)is very important not only for enhancing the detonation performance but also for its lifetime prediction.In this work,UV-Vis light-induced photolysis of nano HNS was studied by different spectroscopic methods.Nano HNS was found to be sensitive to UV-Vis lights at 365 and 470 nm.The photolysis route of nano HNS was mostly the same as its bulk counterpart,which was likely to be the combination of the isomerization of-NO_(2)to-ONO and the breaking of the C-N bond in Ar-NO_(2)(Ar=Aromatic ring).In addition,the possible mechanism of UV-Vis-induced visible color change was explored for the first time.
文摘Resonance exists very commonly ranging from elementary particles to large celestial bodies,creating variety of new things and phenomena.As a typical forced vibration,resonance makes a physical system to absorb more energy from the surrounding environment at its natural vibration frequency,leading up to enhancement eff ect and bringing new opportunities to improve sensitivity in analytical chemistry.
