Micro‐/Nanostructured Highly Crystalline Organic Semiconductor Films for Surface‐Enhanced Raman Spectroscopy Applications
Micro‐/Nanostructured Highly Crystalline Organic Semiconductor Films for Surface‐Enhanced Raman Spectroscopy Applications
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DOI：
10.1002/adfm.201502151
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发表时间：
2015-09
影响因子：
19
通讯作者：
M. Yilmaz;M. Ozdemir;Hakan Erdoğan;U. Tamer;Unal Sen;A. Facchetti;H. Usta;G. Demirel
中科院分区：
文献类型：
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作者：
M. Yilmaz;M. Ozdemir;Hakan Erdoğan;U. Tamer;Unal Sen;A. Facchetti;H. Usta;G. Demirel
利用无机半导体材料进行表面增强拉曼光谱（Sers）研究引起了人们极大的兴趣。然而，尽管有机半导体通过溶液加工技术实现廉价，大面积和灵活的设备的技术相关性，但这些π共轭系统从未被研究用于Sers应用。在这里，第一次，一个简单的和多功能的方法被证明用于制造新的Sers平台的基础上微/纳米结构的2，7-二辛基[1]苯并噻吩并[3，2-B][1]苯并噻吩（C8-BTBT）薄膜通过斜角气相沉积。C8-BTBT薄膜的形态通过改变沉积角度来操纵，从而对于90°沉积角度实现高度有利的3D垂直对齐的带状微米/纳米结构。通过将C8-BTBT半导体薄膜与纳米级薄Au层相结合，在增强（λ 108）、稳定性（>90 d）和再现性（RSD < 0.14）方面实现了显著的Sers响应，表明Au/C8-BTBT薄膜作为Sers平台的巨大前景。我们的研究结果展示了基于有机半导体的Sers平台的第一个例子，具有优异的检测特性，表明π共轭有机半导体在Sers应用中具有巨大的潜力。
The utilization of inorganic semiconductors for surface‐enhanced Raman spectroscopy (SERS) has attracted enormous interest. However, despite the technological relevance of organic semiconductors for enabling inexpensive, large‐area, and flexible devices via solution processing techniques, these π‐conjugated systems have never been investigated for SERS applications. Here for the first time, a simple and versatile approach is demonstrated for the fabrication of novel SERS platforms based on micro‐/nanostructured 2,7‐dioctyl[1]benzothieno[3,2‐b][1]benzothiophene (C8‐BTBT) thin films via an oblique‐angle vapor deposition. The morphology of C8‐BTBT thin films is manipulated by varying the deposition angle, thus achieving highly favorable 3D vertically aligned ribbon‐like micro‐/nanostructures for a 90° deposition angle. By combining C8‐BTBT semiconductor films with a nanoscopic thin Au layer, remarkable SERS responses are achieved in terms of enhancement (≈108), stability (>90 d), and reproducibility (RSD < 0.14), indicating the great promise of Au/C8‐BTBT films as SERS platforms. Our results demonstrate the first example of an organic semiconductor‐based SERS platform with excellent detection characteristics, indicating that π‐conjugated organic semiconductors have a great potential for SERS applications.