Position-sensitive-detectors(PSDs)based on lateral photoeffect have been widely used in diverse applications1–9,including optical engineering,aerospace and military fields.With increasing demand in long distance,low ...Position-sensitive-detectors(PSDs)based on lateral photoeffect have been widely used in diverse applications1–9,including optical engineering,aerospace and military fields.With increasing demand in long distance,low energy consumption,and weak signal sensing systems,the poor responsivity of conventional PSDs has become a bottleneck limiting their applications,for example,silicon p–n or p–i–n junctions2–5,or other materials and architectures6–10.Herein,we present a high-performance graphene-based PSDs with revolutionary interfacial amplification mechanism.Signal amplification in the order of~10^(4) has been demonstrated by utilizing the ultrahigh mobility of graphene and long lifetime of photo-induced carriers at the interface of SiO_(2)/Si.This would improve the detection limit of Si-based PSDs fromμW to nW level,without sacrificing the spatial resolution and response speed.Such interfacial amplification mechanism is compatible with current Si technology and can be easily extended to other sensing systems11,12.展开更多
1 Introduction The incidence of"three highs",referring to hy-perglycemia,hypertension,and hyperlipidemia,has been increasing rapidly all over the world(Dey and Raj,2013;Gao et al.,2019).These illnesses may b...1 Introduction The incidence of"three highs",referring to hy-perglycemia,hypertension,and hyperlipidemia,has been increasing rapidly all over the world(Dey and Raj,2013;Gao et al.,2019).These illnesses may be attributed to the perturbations of blood metabolites which are small molecules within biofluids(Patil et al.,2018).Among them,the presence of cholesterol and glucose in blood at abnormal levels highly increases the risk of cardiac and brain vascular diseases,and diabetes(Li et al.,2019).展开更多
基金supported by the National Key Research and Development Program of China(No.2017YFA0205700)NSFC(61774034,61422503 and 61376104)the Fundamental Research Funds for the Central Universities,and Research and Innovation Project for College Graduates of Jiangsu Province No.KYLX15_0111.
文摘Position-sensitive-detectors(PSDs)based on lateral photoeffect have been widely used in diverse applications1–9,including optical engineering,aerospace and military fields.With increasing demand in long distance,low energy consumption,and weak signal sensing systems,the poor responsivity of conventional PSDs has become a bottleneck limiting their applications,for example,silicon p–n or p–i–n junctions2–5,or other materials and architectures6–10.Herein,we present a high-performance graphene-based PSDs with revolutionary interfacial amplification mechanism.Signal amplification in the order of~10^(4) has been demonstrated by utilizing the ultrahigh mobility of graphene and long lifetime of photo-induced carriers at the interface of SiO_(2)/Si.This would improve the detection limit of Si-based PSDs fromμW to nW level,without sacrificing the spatial resolution and response speed.Such interfacial amplification mechanism is compatible with current Si technology and can be easily extended to other sensing systems11,12.
基金This work is supported by the National Key Scientific Instrument and Equipment Development Project of China(No.51627808)the National Natural Science Foundation of China(No.51605088)+2 种基金the Natural Science Foundation of Jiangsu Province(Nos.BK20170667 and BK20201278)the Postgraduate Research&Practice Innovation Program of Jiangsu Province(No.SJCX20_0026)the Zhishan Youth Scholar Program of Southeast University(SEU),China.
文摘1 Introduction The incidence of"three highs",referring to hy-perglycemia,hypertension,and hyperlipidemia,has been increasing rapidly all over the world(Dey and Raj,2013;Gao et al.,2019).These illnesses may be attributed to the perturbations of blood metabolites which are small molecules within biofluids(Patil et al.,2018).Among them,the presence of cholesterol and glucose in blood at abnormal levels highly increases the risk of cardiac and brain vascular diseases,and diabetes(Li et al.,2019).
