美國佐治亞理工學院（GeorgiaInstituteofTechnology）王中林教授領導的研究小組最近利用肖特基特性製備出高性能傳感器——ziwaiguangchuanganqiheshengwuchuanganqi。yuchuantongdejiyuoumujiechudechuanganqixiangbi，zhexiechuanganqibujinbalingmindutigaolejigeshuliangji，erqieqifanyingshijianhehuifushijianyeyoushuliangjishangdegaishan。zheyifaxianweichuanganqidejinyibufazhantichuleyigezhongyaodexinsilu。

　　傳統的傳感器依賴納米線的表麵效應（側麵）和氣體或生物分子在表麵的吸附和解吸附過程。為了提高器件對光、huaxueqitihuoshengwufenzidelingmindu，namixianxuyaofeichangxiao，congerqibiaomianxiaoyingnenggouxianzhu。tongshiyanjiurenyuancaiyongoumujiechulaijiangdijiechudianzudeyingxiang，congerjinyibutuchubiaomianxiaoying。lingwai，fenzizaibiaomiandexifuhejiexifushiyigexiangduijiaomandeguocheng，zheyedaozhixiangyingdechuanganqifanyingshijianhehuifushijianjiaochang，shenzhizai100秒以上，這也嚴重地限製了傳感器的應用。

　　wangzhonglinjiaoshoulingdaodexiaozushenrufenxibijiaolexiaotejijiechuheoumujiechudeyuanlihetedian，tichulexiaotejijiechuyekeyiyongyugouzaochuanganqi，erqieqixingnengkeyigenghao。jiyuzheyixiangfa
，tamenchenggongyanzhichuziwaiguangchuanganqiheshengwuchuanganqi，qijieguofenbiefabiaoyu《應用物理快報》（AppliedPhysicsLetters,2009,94,191103）和《先進材料》（AdvancedMaterials,2009,21,online）。這zhe一yi新xin型xing紫zi外wai光guang傳chuan感gan器qi不bu僅jin靈ling敏min，其qi反fan應ying時shi間jian和he恢hui複fu時shi間jian也ye有you了le質zhi的de飛fei躍yue。采cai用yong同tong樣yang氧yang化hua鋅xin納na米mi線xian但dan兩liang端duan是shi歐ou姆mu接jie觸chu的de傳chuan感gan器qi在zai開kai關guan紫zi外wai光guang後hou恢hui複fu時shi間jian長chang達da417秒

，而基於肖特基的傳感器僅僅0.8秒。利用高分子進行表麵修飾後其恢複時間進一步縮短到0.02miao，congerdadaolesigeshuliangjidetigao。yucixiangsi，caiyongtongyangyanghuaxinnamixiandanliangduanshioumujiechudechuanganqiduishengwufenzimeiyoumingxianxiangying。gaiyongxiaotejihou，chuanganqibujinyouxianzhudexiangying，bingqiexiangyinghehuifufeichangxunsu。duiyushengwufenzichuangan，qilingmindutigaolesandaosigeshuliangji，bingnengyouxiaoqufenchusuodaidianhedezhengfu。

　　這zhe些xie新xin型xing傳chuan感gan器qi的de優you異yi性xing能neng歸gui功gong於yu肖xiao特te基ji接jie觸chu。肖xiao特te基ji勢shi壘lei和he界jie麵mian附fu近jin的de內nei建jian電dian場chang對dui電dian流liu的de傳chuan輸shu起qi到dao關guan鍵jian作zuo用yong，而er納na米mi線xian主zhu體ti和he表biao麵mian的de影ying響xiang則ze相xiang對dui較jiao弱ruo。外wai界jie因yin素su（紫外光或生物分子）可(ke)以(yi)直(zhi)接(jie)影(ying)響(xiang)肖(xiao)特(te)基(ji)勢(shi)壘(lei)和(he)界(jie)麵(mian)附(fu)近(jin)的(de)內(nei)建(jian)電(dian)場(chang)。這(zhe)一(yi)變(bian)化(hua)可(ke)以(yi)比(bi)表(biao)麵(mian)效(xiao)應(ying)更(geng)為(wei)顯(xian)著(zhu)地(di)調(tiao)製(zhi)通(tong)過(guo)傳(chuan)感(gan)器(qi)的(de)電(dian)流(liu)，從(cong)而(er)提(ti)高(gao)了(le)器(qi)件(jian)的(de)靈(ling)敏(min)度(du)。肖(xiao)特(te)基(ji)勢(shi)壘(lei)和(he)內(nei)建(jian)電(dian)場(chang)的(de)變(bian)化(hua)和(he)對(dui)電(dian)流(liu)的(de)調(tiao)製(zhi)可(ke)以(yi)在(zai)極(ji)短(duan)的(de)時(shi)間(jian)內(nei)完(wan)成(cheng)
，所(suo)以(yi)這(zhe)一(yi)新(xin)型(xing)傳(chuan)感(gan)器(qi)擁(yong)有(you)了(le)基(ji)於(yu)歐(ou)姆(mu)接(jie)觸(chu)的(de)傳(chuan)感(gan)器(qi)無(wu)可(ke)比(bi)擬(ni)的(de)反(fan)應(ying)和(he)恢(hui)複(fu)時(shi)間(jian)。