Journal ArticleDOI
Nanostructured organic semiconductor films for molecular detection with surface-enhanced Raman spectroscopy
Mehmet Yilmaz,Mehmet Yilmaz,Esra Babur,Mehmet Özdemir,Rebecca L. Gieseking,Yavuz Dede,Ugur Tamer,George C. Schatz,Antonio Facchetti,Hakan Usta,Gokhan Demirel +10 more
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TLDR
It is demonstrated that SERS-active, superhydrophobic and ivy-like nanostructured films of a molecular semiconductor, α,ω-diperfluorohexylquaterthiophene (DFH-4T), can be easily fabricated by vapour deposition and the fundamental roles of the π-conjugated core fluorocarbon substitution and the unique DFH- 4T film morphology governing the SERS response are demonstrated.Abstract:
π-Conjugated organic semiconductors have been explored in several optoelectronic devices, yet their use in molecular detection as surface-enhanced Raman spectroscopy (SERS)-active platforms is unknown. Herein, we demonstrate that SERS-active, superhydrophobic and ivy-like nanostructured films of a molecular semiconductor, α,ω-diperfluorohexylquaterthiophene (DFH-4T), can be easily fabricated by vapour deposition. DFH-4T films without any additional plasmonic layer exhibit unprecedented Raman signal enhancements up to 3.4 × 103 for the probe molecule methylene blue. The combination of quantum mechanical computations, comparative experiments with a fluorocarbon-free α,ω-dihexylquaterthiophene (DH-4T), and thin-film microstructural analysis demonstrates the fundamental roles of the π-conjugated core fluorocarbon substitution and the unique DFH-4T film morphology governing the SERS response. Furthermore, Raman signal enhancements up to ∼1010 and sub-zeptomole (<10-21 mole) analyte detection were accomplished by coating the DFH-4T films with a thin gold layer. Our results offer important guidance for the molecular design of SERS-active organic semiconductors and easily fabricable SERS platforms for ultrasensitive trace analysis.read more
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Journal ArticleDOI
Present and Future of Surface-Enhanced Raman Scattering
Judith Langer,Dorleta Jimenez de Aberasturi,Javier Aizpurua,Ramon A. Alvarez-Puebla,Baptiste Auguié,Baptiste Auguié,Jeremy J. Baumberg,Guillermo C. Bazan,Steven E. J. Bell,Anja Boisen,Alexandre G. Brolo,Jaebum Choo,Dana Cialla-May,Dana Cialla-May,Volker Deckert,Volker Deckert,Laura Fabris,Karen Faulds,F. Javier García de Abajo,Royston Goodacre,Duncan Graham,Amanda J. Haes,Christy L. Haynes,Christian W. Huck,Tamitake Itoh,Mikael Käll,Janina Kneipp,Nicholas A. Kotov,Hua Kuang,Eric C. Le Ru,Eric C. Le Ru,Hiang Kwee Lee,Jian-Feng Li,Xing Yi Ling,Stefan A. Maier,Thomas G. Mayerhöfer,Thomas G. Mayerhöfer,Martin Moskovits,Kei Murakoshi,Jwa-Min Nam,Shuming Nie,Yukihiro Ozaki,Isabel Pastoriza-Santos,Jorge Pérez-Juste,Juergen Popp,Juergen Popp,Annemarie Pucci,Stephanie Reich,Bin Ren,George C. Schatz,Timur Shegai,Sebastian Schlücker,Li-Lin Tay,K. George Thomas,Zhong-Qun Tian,Richard P. Van Duyne,Tuan Vo-Dinh,Yue Wang,Katherine A. Willets,Chuanlai Xu,Hongxing Xu,Yikai Xu,Yuko S. Yamamoto,Bing Zhao,Luis M. Liz-Marzán +64 more
TL;DR: Prominent authors from all over the world joined efforts to summarize the current state-of-the-art in understanding and using SERS, as well as to propose what can be expected in the near future, in terms of research, applications, and technological development.
Journal ArticleDOI
Designing surface-enhanced Raman scattering (SERS) platforms beyond hotspot engineering: emerging opportunities in analyte manipulations and hybrid materials.
Hiang Kwee Lee,Yih Hong Lee,Charlynn Sher Lin Koh,Gia Chuong Phan-Quang,Xuemei Han,Chee Leng Lay,Chee Leng Lay,Howard Yi Fan Sim,Ya-Chuan Kao,Qi An,Qi An,Xing Yi Ling +11 more
TL;DR: Five major approaches to enhance SERS performance are outlined and can be integrated with engineered hotspots as a multifaceted strategy to further boost SERS sensitivities that are unachievable using hotspot engineering alone.
Journal ArticleDOI
1T′ Transition Metal Telluride Atomic Layers for Plasmon-Free SERS at Femtomolar Levels
Li Tao,Kun Chen,Zefeng Chen,Chunxiao Cong,Caiyu Qiu,Jiajie Chen,Ximiao Wang,Huanjun Chen,Ting Yu,Weiguang Xie,Shaozhi Deng,Jianbin Xu +11 more
TL;DR: The 1T' transition metal telluride atomic layers (WTe2 and MoTe2) are demonstrated as ultrasensitive platforms for CM-based SERS and give rise to the promising SERS effects by promoting the charge transfer resonance in the analyte-telluride complex.
Journal ArticleDOI
Surface-enhanced Raman spectroscopy (SERS): an adventure from plasmonic metals to organic semiconductors as SERS platforms
Gokhan Demirel,Hakan Usta,Mehmet Yilmaz,Mehmet Yilmaz,Merve Celik,Husniye Ardic Alidagi,Husniye Ardic Alidagi,Fatih Buyukserin +7 more
TL;DR: Recently, surface-enhanced Raman spectroscopy (SERS) is considered as one of the most reliable, sensitive and selective techniques for non-destructive molecular analysis through the amplification of electromagnetic fields and/or creation of charge transfer states between the chemisorbed analyte molecule and SERS active platform.
Journal ArticleDOI
Metal-Organic Frameworks as Surface Enhanced Raman Scattering Substrates with High Tailorability.
TL;DR: It is demonstrated that metal-organic framework materials can serve as a type of SERS substrate with molecular selectivity, which are rarely realized for SERS detection without any special pretreatment, and opens a new venue for the development of Sers substrates with high-design flexibility.
References
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Journal ArticleDOI
Surface-enhanced Raman spectroscopy (SERS) for environmental analyses
TL;DR: The refinement of surface enhanced Raman spectroscopy (SERS) has further pushed the utility of this technique into myriad systems, and Halvorson and Vikesland overview the theory and methods, and illustrate environmental applications from contaminant to pathogen detection.
Journal ArticleDOI
CuTe Nanocrystals: Shape and Size Control, Plasmonic Properties, and Use as SERS Probes and Photothermal Agents
Wenhua Li,Reza R. Zamani,Pilar Rivera Gil,Beatriz Pelaz,Maria Ibáñez,Doris Cadavid,Alexey Shavel,Ramon A. Alvarez-Puebla,Wolfgang J. Parak,Jordi Arbiol,Jordi Arbiol,Andreu Cabot +11 more
TL;DR: A procedure to prepare highly monodisperse copper telluride nanocubes, nanoplates, and nanorods and preliminary analysis of the use of CuTe nanocrystals as cytotoxic and photothermal agents are reported.
Journal ArticleDOI
Spectroscopic Mode Mapping of Resonant Plasmon Nanoantennas
TL;DR: Spatially resolved spectral mode mapping of resonant plasmon gap antennas using two-photon luminescence microspectroscopy is presented and shows a dynamical charge redistribution due to the near-field coupling between the two arms.
Journal ArticleDOI
Building blocks for N-type molecular and polymeric electronics. Perfluoroalkyl- versus alkyl-functionalized oligothiophenes (nTs; n = 2-6). Systematic synthesis, spectroscopy, electrochemistry, and solid-state organization.
Antonio Facchetti,Myung-Han Yoon,Charlotte L. Stern,Geoffrey R. Hutchison,Mark A. Ratner,Tobin J. Marks +5 more
TL;DR: The combined analysis of these data indicates that fluorocarbon-substituted nT molecules strongly interact in the condensed state, with unit cell level phase separation between the aromatic core and fluorOCarbon chains.
Journal ArticleDOI
Evidence and implications of direct charge excitation as the dominant mechanism in plasmon-mediated photocatalysis.
TL;DR: It is proposed that localized LSPR-induced electric fields result in a direct charge transfer within the molecule–adsorbate system, providing a foundation for the development of plasmonic catalysts that can selectively activate targeted chemical bonds.
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