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The surface plasmons produced by the collective oscillation of conduction electrons in metal nanostructures can redistribute not only the electromagnetic field spatiotemporally, but also the excited carriers. Various effects caused by surface plasmons, including enhanced electromagnetic fields, local heating, excited electrons and excited holes, can drive chemical reactions. In this work, the regularly-arranged Au nanoarray catalytic substrate is prepared based on an anodic aluminum oxide template. When the excitation light of a specific wavelength irradiates on the substrate, a large number of regularly-arranged local surface plasmon enhancement regions will be generated on its surface. By taking advantage of surface enhanced Raman spectroscopy, the 4,4′-dimercaptoazobenzene is synthesized by the photocatalytic reaction of p-aminothiophenol as a probe driven by local surface plasmon. After that, the sodium borohydride is introduced in situ. Under the same experimental conditions, the product 4,4′-dimercaptoazobenzene is driven by plasma to produce p-aminothiophenol again. This research work will achieve the drawing and erasing of molecular graphics on a micro scale and a nano scale, as well as information encryption, reading and erasing, which has a strong application value.
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Keywords:
- gold nanoarrays /
- surface plasmon /
- Raman spectroscopy /
- photocatalysis
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图 1 ATP表面等离子体驱动光催化反应生成DMAB过程 (a) PATP拉曼特征峰; (b) DMAB拉曼特征峰; (c)等离子体驱动光催化反应示意图
Figure 1. Formation process of DMAB from PATP surface plasma driven photocatalytic reaction: (a) PATP Raman characteristic peak; (b) DMAB Raman characteristic peak; (c) schematic diagram of plasma driven photocatalytic reaction.
图 2 金纳米阵列基底的形貌表征 (a)金纳米阵列的三维原子力显微镜图片; (b)金纳米阵列的扫面电子显微镜图片; (c)金纳米阵列几何尺寸分析; (d)采用FDTD模拟得出金纳米阵列的消光谱
Figure 2. Surface topography of gold nanoarray substrate: (a)Three-dimensional AFM image of gold nanoarray; (b) SEM image of gold nanoarray; (c) geometric dimension analysis of gold nanoarray; (d) extinction spectrum of gold nano array by FDTD simulation.
图 3 基于金纳米阵列基底的等离子体驱动光催化拉曼光谱 (a) PATP光催化生成DMAB过程拉曼光谱; (b) DMAB逆向反应生成PATP过程拉曼光谱
Figure 3. Raman spectrum of plasma driven photocatalysis based on gold nanoarray substrate: (a) Raman spectrum of PATP photocatalysis generating DMAB; (b) Raman spectrum of DMAB reverse reaction generating PATP.
图 4 金纳米阵列基底等离子体驱动光催化机制 (a)金纳米阵列理论模型; (b)金纳米阵列表面等离子体模拟激发光偏振方向; (c)金纳米阵列表面等离子体强度分布特性计算结果; (d)金纳米阵列表面等离子体模拟强度分布分析; (e)金纳米阵列表面等离子体分布随时间变化模拟结果; (f)金纳米阵列基底等离子体驱动光催化机制示意图, 其中E2是来自于633 nm激光激发热电子/空穴的能量
Figure 4. Mechanism of gold nanoarray substrate plasma driven photocatalysis is as follows: (a)Theoretical model of gold nanoarray; (b) polarization direction of stimulated luminescence simulated by surface plasmon of gold nanoarray; (c) calculation results of intensity distribution characteristics of surface plasmon of gold nanoarray; (d) analysis of intensity distribution simulated by surface plasmon of gold nanoarray; (e) surface plasmon distribution of gold nanoarray; (f) mechanism of Au nanoarray substrate plasma driven photocatalysis, E2 is energy distribution of hot electrons/holes excited by 633 nm laser.
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[1] Fleischmann M, Hendra P J, McQuillan A J Raman 1974 Chem. Phys. Lett. 26 163
Google Scholar
[2] Jeanmaire D L, van Duyne R P 1977 J. Electroanal. Chem. Interfacial Electrochem 84 1
Google Scholar
[3] Liu X J, Tang L H, Niessner R, Ying Y B, Haisch C 2015 Anal. Chem. 87 499
Google Scholar
[4] Zhan C, Chen X J, Huang Y F, Wu D Y, Tian Z Q 2019 Acc. Chem. Res. 52 2784
Google Scholar
[5] Zhang Z Y, Kneipp J 2018 Anal. Chem. 90 9199
Google Scholar
[6] Qi X N, Wei Y Q, Jiang C X, Zhang L S, Wang P J, Fang Y 2020 SpectrochimicaActa Part A: Molecular and Biomolecular Spectroscopy 237 118362
Google Scholar
[7] Lin W H, Cao Y Q, Wang P J, Sun M T 2017 Langmuir 33 12102
Google Scholar
[8] Sheng S X, Ji Y F, Yan X H, Wei H, Luo Y, Xu H X 2020 J. Phys. Chem. C 124 11586
Google Scholar
[9] Jiang C X, Wei Y Q, Zhao P C, Wang P J, Fang Y, Zhang L S 2020 Eur. Phys. J. Plus 135 671
Google Scholar
[10] Mayer K M, Hafner J H 2011 Chem. Rev. 111 3828
Google Scholar
[11] Jain P K, Huang X, El-Sayed I H, El-Sayed M A 2008 Acc. Chem. Res. 41 1578
Google Scholar
[12] Lal S, Clare S E, Halas N J 2008 Acc. Chem. Res. 41 1842
Google Scholar
[13] Zhan C, Chen X J, Yi J, Li J F, Wu D Y, Tian Z Q 2018 Nat. Rev. Chem. 2 216
Google Scholar
[14] Zhang Y, He S, Guo W, Hu Y, Huang J, Mulcahy J R, Wei W D 2018 Chem. Rev. 118 2927
Google Scholar
[15] Aslam U, Rao V G, Chavez S, Linic S 2018 Nat. Catal. 1 656
Google Scholar
[16] Kim S, Kim J M, Park J E, Nam J M 2018 Adv. Mater. 30 1704528
Google Scholar
[17] Sun M, Xu H 2012 Small 8 2777
Google Scholar
[18] Aslam U, Chavez S, Linic S 2017 Nat. Nanotechnol. 12 1000
Google Scholar
[19] Zayats A V, Maier S 2017 Adv. Opt. Mater. 5 1700508
Google Scholar
[20] Huang Y F, Wang W, Guo H Y, Zhan C, Duan S, Zhan D P, Wu D Y, Ren B, Tian Z Q 2020 J. Am. Chem. Soc. 142 8483
Google Scholar
[21] Zeng Z, Qi X N, Li X J, Zhang L S, Wang P J, Fang Y 2019 Appl. Surf. Sci. 480 497
Google Scholar
[22] Liu Y Q, Zhao L J, Li X J, Zeng Z, Wang P J, Zhang L S, Fang Y 2018 Appl. Surf. Sci. 428 900
Google Scholar
[23] Linic S, Aslam U, Boerigter C, Morabito M 2015 Nat. Mater. 14 567
Google Scholar
[24] Zhang Z L, Xu P, Yang X Z, Liang W J, Sun M T 2016 J. Photochem. Photobiol. C 27 100
Google Scholar
[25] Moskovits M 1985 Rev. Mod. Phys. 57 783
Google Scholar
[26] Kneipp K, Kneipp H, Itzkan I, Dasari R R, Feld M S 1999 Chem. Rev. 99 2957
Google Scholar
[27] Lombardi J R, Birke R L 2008 J. Phys. Chem. C 112 5605
Google Scholar
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