A fracture mechanics analysis is conducted for a delamination problem of a multilayered thermoelectric material(TEM) that consists of an n-type layer and a p-type layer sandwiched by an insulating layer. A time-varyin...A fracture mechanics analysis is conducted for a delamination problem of a multilayered thermoelectric material(TEM) that consists of an n-type layer and a p-type layer sandwiched by an insulating layer. A time-varying energy release rate is presented when the n-type layer delaminates from the insulating layer. Effects of the temperature difference across the system and the applied electric current on the energy release rate are identified. The influence of the thickness ratio of the insulating layer to the thermoelectric(TE) layer is also examined. Based on the energy release rate criterion,the critical temperature difference for delamination propagation is obtained. Some useful conclusions are given.展开更多
Electrochemical detection is an efficient method for the detection of Bisphenol A(BPA).Herein,a sensitive photo-electrochemical sensor based on two-dimensional(2 D)TiO_(2)(001)nanosheets was fabricated and then used f...Electrochemical detection is an efficient method for the detection of Bisphenol A(BPA).Herein,a sensitive photo-electrochemical sensor based on two-dimensional(2 D)TiO_(2)(001)nanosheets was fabricated and then used for BPA electrochemical detection.Upon light irradiation,the 2 D TiO_(2)(001)nanosheets electrode provided a lower detection limit of BPA detection compared with an ambient electrochemical determination.The low detection limit is^5.37 nmol/L(S/N=3).Furthermore,profiting from the photoelectric characteristics,the 2 D TiO_(2)(001)nanosheets electrode exhibits a nice regeneration prope rty.After 45 min of light irradiation,the electrochemical signal was regenerated from14.7%to 82.9%of the original signal at the 6th cycle.This is attributed to the non-selective·OH mediation produced by the 2 D TiO_(2)(001)nanosheets mineralizing anodic polymeric products and resuming surface reactive sites.This investigation indicates that photo-assistance is an efficient method to improve the electrochemical sensor for detecting BPA in water environments.展开更多
基金supported by the National Natural Science Foundation of China(Nos.11672084,11602072,and 11372086)the Natural Science Foundation of Guangdong Province of China(Nos.2016A030311006 and 2016A030310367)the Research Innovation Fund of Shenzhen City of China(Nos.JCYJ20170413104256729 and JCYJ20170811160538023)
文摘A fracture mechanics analysis is conducted for a delamination problem of a multilayered thermoelectric material(TEM) that consists of an n-type layer and a p-type layer sandwiched by an insulating layer. A time-varying energy release rate is presented when the n-type layer delaminates from the insulating layer. Effects of the temperature difference across the system and the applied electric current on the energy release rate are identified. The influence of the thickness ratio of the insulating layer to the thermoelectric(TE) layer is also examined. Based on the energy release rate criterion,the critical temperature difference for delamination propagation is obtained. Some useful conclusions are given.
基金the Applied Basic Research Programs of Yunnan Science and Technology Department(No.2017FD085)the Program of Introducing Talents of Kunming University(Nos.YJL16003 and YJL18008)+4 种基金National Nature Science Foundation of China(No.61904073)Science Foundation of Yunnan Provincial Education Department(No.2018JS392)Projects of Science and Technology Plans of Kunming(No.20191-C-25318000002189)“Thousand Talents Program”of Yunnan Province for Young TalentsSpring City Plan-Special Program for Young Talents。
文摘Electrochemical detection is an efficient method for the detection of Bisphenol A(BPA).Herein,a sensitive photo-electrochemical sensor based on two-dimensional(2 D)TiO_(2)(001)nanosheets was fabricated and then used for BPA electrochemical detection.Upon light irradiation,the 2 D TiO_(2)(001)nanosheets electrode provided a lower detection limit of BPA detection compared with an ambient electrochemical determination.The low detection limit is^5.37 nmol/L(S/N=3).Furthermore,profiting from the photoelectric characteristics,the 2 D TiO_(2)(001)nanosheets electrode exhibits a nice regeneration prope rty.After 45 min of light irradiation,the electrochemical signal was regenerated from14.7%to 82.9%of the original signal at the 6th cycle.This is attributed to the non-selective·OH mediation produced by the 2 D TiO_(2)(001)nanosheets mineralizing anodic polymeric products and resuming surface reactive sites.This investigation indicates that photo-assistance is an efficient method to improve the electrochemical sensor for detecting BPA in water environments.
