English
聯系我們
網站地圖
郵箱
舊版回顧



中國科大在單分子電致上轉換發光的實驗觀察與機理研究中取得進展

文章來源:中國科學技術大學   發布時間:2019-05-10  【字號:     】  

  最近,中國科學技術大學單分子科學團隊的董振超研究小組,通過掃描隧道顯微鏡(STM)誘導單分子電致發光技術,首次清晰地展示了單個分子在電激勵下的上轉化發光行為,并通過與深圳大學教授李曉光等合作,從理論上揭示了其微觀機制。國際物理學術期刊《物理評論快報》于53日在線發表了這項成果。

  上轉換發光通常指材料吸收低能光子但發出高能光子的反斯托克斯過程,這一現象在激光信息技術、紅外探測、生物醫學等領域有巨大的應用前景。電激勵下的上轉化發光過程中,有機分子吸收由STM注入的低能電子,并在其弛豫過程中發射出高能光子。這一過程涉及分子電子能態、分子間以及分子與周圍環境間的相互作用,深入理解這些相互競爭與制約的微觀過程,對其在有機光電轉換器件、光催化和光合成等方面的應用有著至關重要的意義。

    中國科大單分子科學團隊長期致力于發展將STM高空間分辨表征與光學技術高靈敏探測相結合的技術,特別是通過巧妙調控隧道結納腔等離激元的寬頻、局域與增強特性,拓展了測量極限,為在單分子水平上觀測和調控分子的光電行為提供了有力手段。他們利用高度局域化的隧穿電子作為激發源,研究了氯化鈉脫耦合層表面上的單個酞菁分子的電致熒光,不僅發現了反常的電致上轉換發光現象,還清晰地展示了分子發光強度的三個不同偏壓區域。尤其值得指出的是,該工作在單分子水平上觀測到電致上轉換發光現象,有力排除了此前對這類體系中上轉換機制的一些猜測,同時不同偏壓區域的觀測也為分析和理解上轉換機制提供了豐富的數據。以此為基礎的理論分析進一步表明,兩種不同的分子激發機制——非彈性電子散射和載流子注入——之間的微妙競爭導致了不同偏壓區域不同的發光現象。基于對上述兩種激發機制以及對系統其它潛在激發態的定量分析,研究團隊首次提出了以自旋三重態作為中間過渡態,同時結合非彈性電子散射和載流子注入兩種激發過程的單分子上轉換發光機制。

  陳功與駱陽為這篇文章的共同第一作者。該系列研究工作得到基金委、科技部、中科院、教育部、安徽省等的支持。

  論文鏈接

 

  圖注:(a) STM誘導單分子電致發光的實驗構型示意圖;(b) 三種不同偏壓下單分子電致發光光譜,展示了單分子的上轉換發光現象;(c) 單分子電致發光強度的偏壓依賴關系。




(責任編輯:葉瑞優)

附件:

專題推薦

相關新聞


© 1996 - 中國科學院 版權所有 京ICP備05002857號  京公網安備110402500047號  聯系我們

地址:北京市三里河路52號 郵編:100864

凤彩网www.44gpc.com 744360.com | 794340.com | www.dt0.com | www.461.in | www.53500.cc | www.712915.com | www.748878.com | 353892.com | www.sn13.com | www.4263.biz | www.303226.com | www.599907.com | www.973417.com | 486391.com | 739074.com | 500彩票www.500770.com | www.ue21.com | www.693.live | 539179.com | www.3699.cc | www.42059.com | www.01597.com | www.281552.com | www.514318.com | www.825236.cc | www.944623.com | cp257.com | 739501.com | 500彩票www.757988.com | www.mp24.com | www.644586.com | www.998214.com | 458841.com | www.11952.cc | www.99332.cc | www.164062.com | www.539451.com | www.597696.com | www.787276.com | 752803.com | 699564.com | www.ev63.com | www.58488.cc | www.061172.com | www.915281.com | www.805119.com | www.901449.com | 731506.com | 302551.com | www.98ju.com | www.17767.com | www.055666.com | www.526155.com | www.969225.com | www.cai10.cc | www.16br.com | www.993.online | www.113447.com | www.276917.com | www.452561.com | www.729548.com | www.854472.com | www.969235.com | www.87td.com | www.059127.com | www.155018.com | www.428418.com | www.766658.com | www.915385.com | 617618.com | 世彩堂www.5854m.cc | www.g53.com | www.0067.vip | www.22108.cc | www.85529.com | www.120639.com | www.449113.com | www.554056.com | www.089331.com | www.263820.com | www.233763.com | www.588249.com | www.733981.com | ed03.com | 00223.cc | 781324.com | 755430.com | www.82ik.com | www.71187.cc | www.380399.com | www.553715.com | www.997163.com | www.988899.com | www.961586.com | www.975245.com | 909733.com | 01808.cc | 218507.com | www.4997.cn | www.2654.cc | www.94ia.com | www.94dr.com | www.7138.vip | www.96331.com | www.060773.com | www.493757.com | www.789752.com | 67577.com | www.952096.com | 6712.biz | 973648.com | 83526.com | www.990948.com | www.46uj.com | www.jp03.com | www.92bp.com | www.94565.com | www.052094.com | www.236888.com | www.334909.com | www.984224.com | 954483.com | 49365.com | www.80fw.com | www.6513.org | www.47642.com | www.231838.com | 901994.com | 193596.com | www.h69.biz | www.95ml.com | www.99401.cc | www.314097.com | www.686820.com | 536209.com | www.lt16.com | www.6103.cc | www.219984.com | www.968391.com | www.cp1080.com | www.58854.cc | www.477543.com | www.811485.com | www.xe03.com | www.3849.net | www.596577.com | www.771126.com | www.884750.com | 427087.com | www.bk16.com | www.79fs.com | www.2620.vip | www.37832.cc | www.93278.cc | www.218554.com | 08567.cc | 888017.com | 561053.com | www.cp7799.com | www.6447.xyz | www.42443.com | www.456487.com | www.871069.cc | 717752.com | 005918.com | www.hi58.com | www.5823.cn | www.98226.cc | www.089842.com | www.629170.com | www.931946.com | 008724.com | 579465.com | www.gd41.com | www.6019.biz | www.37068.com | www.061060.com | www.537977.com | 975387.com | 天天中彩票www.867865.com | www.91px.com | www.142947.com | www.413342.com | 454497.com | www.gr80.com | www.0338.loan | www.26301.com | www.383656.com | www.723342.com | www.877755.com | 39彩票www.3933j.cc | www.8478.top | www.54250.com | www.571820.com | cp745.com | www.cai6689.com | 500彩票www.500916.com | www.x92.cn | www.6798.in | www.92558.cc | www.037758.com | www.141195.com | www.339434.com | www.531082.com | www.679250.com | www.789666.com | 074228.com | www.cb48.com | www.72gs.com | www.17515.com | www.009787.com | www.215622.com | www.314467.com | www.663565.com | www.867721.com | www.921049.com | www.809169.com | www.637711.com | 50ug.com | 192068.com | 290034.com | www.g47.bid | www.34328.com | www.88495.com | www.085337.com | www.420160.com | www.595186.com | www.679107.com | www.761570.com | www.878364.com | 405559.com | 680653.com | 大赢家彩票www.526411.com | www.qp83.cc | www.227144.com | www.314667.com | www.567471.com | www.679098.com | www.911807.com | 207161.com | www.tq21.com | www.33nz.com | www.1720.org | www.56939.cc | www.353625.com | www.470095.com | www.683359.com | www.917103.com | www.988878.com | 550469.com | 008761.com | www.ks17.com | www.167.red | www.107011.com | www.202240.com | www.302071.com | www.386792.com | www.754384.com | 23723.com | www.301485.com | www.097856.com | www.196101.com | www.623411.com | 65dw.com | www.yr71.com | www.05sk.com | www.4900.in | www.01220.com | www.98818.com | www.068138.com | www.188006.com | www.506384.com | www.722573.com | www.987174.com | www.996541.com | 94569.com | www.bz47.com | www.95dd.com | www.2700.wang | www.155363.com | www.376336.com | www.709548.com | www.771803.com | 237482.com | t42.cc | www.40gu.com | www.83dl.com | www.344344.cc | www.503081.com | www.776252.com | www.870676.com | 福彩www.86267z.com | www.jn00.com | www.6971.biz | www.06002.com | www.009014.com | www.059139.com | www.501565.com | www.710981.com | www.829003.com | www.888814.cc | www.dy5.com | www.oe87.com | www.80yi.com | www.873.in | www.8058.la | www.29917.com | www.68028.cc | www.586565.com | www.867579.com | 978340.com | cp8866.com | 308201.com | 大赢家彩票平台www.375916.com | www.pf0.com | www.611010.com | www.984173.com | www.544168.com | www.43ui.com | www.62ac.com | www.340518.com | 047253.com | 彩票58www.cp58.biz | www.646.cn | www.8724.vip | www.74714.com | www.185151.com | www.405710.com | www.ll01.com | www.93006.cc | www.689553.com | www.748249.com | 623891.com | 197200.com | 大玩家彩票www.84499c.com | www.gc11.com | www.16ez.com | www.75td.com | www.0309.org | www.8466.top | www.9710.org | www.10555.cc | www.22718.cc | www.133682.com | www.434117.com | www.712822.com | www.fs22.com | www.10bf.com | www.62vo.com | www.4661.biz | www.48696.com | www.101165.com | www.635651.com | 370576.com | www.920777.com | www.659806.com | www.751141.com | www.511166.com | www.980837.com | 499406.com | jc42.com | 071662.com | 295408.com | 976294.com | 154944.com | 546258.com | 087047.com | 5872.bid | 189257.com | www.pq33.com | www.r28.cc | www.013547.com | www.063289.com | www.102145.com | www.494369.com | www.855555.cc | www.370810.com | www.746946.cc | www.857210.com | 939966.com | 586702.com | 818合彩www.www.9889hc.com | JJ彩票www.47370.cc | www.br40.com | www.618.name | www.3699.cn | www.48914.com | www.085857.com | www.13ob.com | www.783029.com | www.40545.com | www.47101.com | www.18333.cc | 362981.com | www.665711.com | www.351532.com | www.28114.com | 06da.com | www.940051.com | www.199702.com | www.050707.com | www.301164.com | www.403448.com | www.770088.com | 127050.com | 895799.com | www.lz.com | www.1155.me | www.76504.com | www.169794.com | www.396668.cc | www.768727.com | www.895138.com | cp753.com | 989412.com | 676146.com | 830589.com | www.cp1699.com | 华彩网www.hcw332.com | 必发彩票www.655096.com | 大赢家彩票平台www.729019.com | www.51dz.cc | www.83nl.com | www.1673.vip | www.56504.com | www.016543.cc | www.93838.com | www.070619.com | www.082488.com | www.275881.com | www.079158.com | www.33224.cc | www.6392.wang | www.65lj.com | www.96fv.com | www.161.live | www.1294.vip | www.195325.com | www.173666.com | www.310270.com | www.166404.com | www.249833.com | www.139977.com | www.462422.com | www.575194.com | www.535585.com | www.805356.com | 246543.com | 345165.com | 64083.com | 668788.com | www.rr16.com | www.tm08.com | www.7597.biz | www.59825.cc | www.206656.com | www.397408.com | www.773569.com | www.781475.com | www.r48.net | www.v01.cc | www.59pa.com | www.83mc.com | www.6842.vip | www.6261.biz | www.521714.com | www.573910.com | www.556380.com | www.521887.com | www.711656.com | www.902311.com | 729701.com | 028532.com | 460406.com | 470897.com | 948469.com | 510.cc | 127942.com | 500彩票www.361477.com | 大赢家彩票平台www.258031.com | 大玩家彩票www.4dwj.com | www.680582.com | 741011.com | 网易彩票www.068wy.com | www.um5.cc | www.vb.com | www.ys3.com | www.cai8244.com | www.81wc.com | www.111117.cc | www.767881.com | www.973346.com | www.915179.com | www.856172.com | 073859.com | www.506777.com | www.516785.com | www.445504.com | www.905209.com | 194168.com | 581418.com | 335979.com | www.oa17.com | www.zh37.com | www.or93.com | www.5431.top | www.267297.com | www.271946.com | www.871200.com | 823012.com | www.987522.com | www.932171.com | www.841004.com | www.838143.com | 680344.com | PK彩票www.www.23040.com | www.cx25.com | www.j13.xyz | www.2656.xyz | www.722.xyz | www.77033.cc | www.81611.com | www.097599.com | www.524422.com | www.677126.com | www.630978.com | www.238077.com | PK彩票www.8499b.com | www.480910.com | www.79nl.com | 31276.com | www.990113.com | www.617883.com | www.205205.com | www.51852.com | 8号彩票www.81520p.com | www.506597.com | www.679184.com | www.567157.com | www.8563.wang | www.982046.com | www.026460.com | 965843.com | www.231350.com | www.46599.com | www.7545.vip | 736792.com | www.151246.com | 353407.com--353407.com | www.387383.com | www.87075.com | 大赢家彩票网www.83033k.com | www.530609.com | www.152.in | 916703.com--13766.com | www.485508.com | www.000566.com | 彩82www.c3518.com | www.995141.com | www.648935.com | www.064646.com | www.83ra.com | 284867.com | www.577817.com | www.4211.in | www.965409.com | www.035158.com | 898245.com | www.410491.com | www.4019.win | www.894811.com | www.62987.cc | cc-betwin100.com | www.404012.com | www.52zt.cc | www.809168.com | www.017787.com | www.879978.com | 439284.com | 80410.com--80410.com | www.954199.com | www.851292.com | www.737003.com | www.739176.com | 576504.com | www.73910.com | www.005464.com | www.69656.cc | www.019050.com | www.351925.com | www.461793.com | www.448012.com | www.654767.com | www.679827.com | www.667113.com | www.630698.com | 7025.com | www.os0.cc | www.356001.com | www.671187.com | www.653165.com | 532813.com | 169553.com | www.2004v.com | 787202.com | 202176.com | 140037.com | 500611.cc | www.991855.com | www.878108.com | 947227.com | 3380.biz | www.962888.com | www.956305.com | www.827772.com | www.723758.com | www.622641.com | www.720349.com | www.659339.com | www.899496.com | www.770913.com | www.674720.com | www.627666.cc | www.740334.com | www.644175.com | www.816848.com | www.779516.com | 218723.com | www.965955.com | www.863155.com | www.929695.com | www.848198.com | www.940664.com | www.816867.com | www.19zz.com | www.kw35.com | www.tc88.cc | www.cp3908.com | oi78.com | 539420.com | 303084.com | 105760.com | www.02188.com | 032240.com | 027610.com | www.949084.com | www.800257.com | www.662876.com | www.874532.com | 6957.biz | www.976978.com | www.856678.com | 019205.com | www.956146.com | www.801114.com | www.960421.com | www.932266.com | www.799973.com | www.263595.com | 好彩头www.51331h.com | www.422445.com | www.le91.com | www.617287.com | www.19191.com | www.948751.com | www.069523.com | www.015739.com | www.88583.cc | www.cp7331.com | www.652082.com | www.332319.com | www.fl89.com | www.635157.com | www.641106.com | www.3234.net | www.797591.com | www.489813.com | www.219929.com | www.16361.com | 810580.com | www.482387.com | www.123976.com | 发彩www.50732k.com | www.453525.com | www.gt02.com | www.590216.com | www.30ec.com | www.669159.com | www.158.bid | www.871757.com | www.032869.com | 948641.com | www.230473.com | www.76np.com | www.688781.com | www.3398.win | www.962089.com | 967051.com | www.31pj.cc | www.924904.com | www.817289.com | www.682734.com | www.679186.com | www.665483.com | www.948704.com | www.878732.com | www.822525.com | www.820045.com | www.818993.com | www.705378.com | www.645178.com | www.585699.com | www.607383.com | www.502305.com | www.377139.com | www.363988.com | www.393363.com | www.363977.com | www.653018.com | www.675276.com | www.846660.com | www.873780.com | www.919249.com | www.692565.com | www.501031.com | www.472883.com | www.268168.com | www.124676.com | www.88654.cc | www.5810.vip | www.oy63.com | 大众彩票www.328229.com | www.8217.cn | www.57lf.com | 500彩票www.553079.com | 019815.com | 192167.com | 863642.com | www.977754.com | www.735433.com | www.548706.com | www.369648.com | www.331241.com | www.419429.com | www.325050.com | www.175298.com | www.502392.com | www.298639.com | www.131312.com | www.133279.com | www.110427.com | www.92625.cc | www.057580.com | www.22077.com | www.159338.com | www.088241.com | www.021480.com | www.