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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Ultimately Sensitive Organic Bioelectronic Transistor Sensors by Materials and Device Structures' Design
Rosaria Anna Picca,Kyriaki Manoli,Eleonora Macchia,Eleonora Macchia,Lucia Sarcina,Cinzia Di Franco,Nicola Cioffi,Davide Blasi,Ronald Österbacka,Fabrizio Torricelli,Gaetano Scamarcio,Luisa Torsi,Luisa Torsi +12 more
Journal ArticleDOI
SERS-Active MIL-100(Fe) Sensory Array for Ultrasensitive and Multiplex Detection of VOCs.
Jing-Hao Fu,Jing-Hao Fu,Zhen Zhong,Dan Xie,Yan-Jun Guo,De-Xuan Kong,Zhongxing Zhao,Zhenxia Zhao,Min Li +8 more
TL;DR: MIL-100(Fe) substrate has a unique "sensor array" property allowing multiplex VOCs detection, with great modifiability and expandability by doping with foreign metal elements, and is utilized to simultaneously detect the different gaseous indicators of lung cancer with ppm detection limit.
Journal ArticleDOI
Recent Development of SERS Technology: Semiconductor-Based Study
TL;DR: An overview of SERS enhancement mechanisms based on semiconductor materials, such as inorganic semiconductors, metal/semiconductor composites, and organic semiconductor are provided.
Journal ArticleDOI
Metal–semiconductor heterostructures for surface-enhanced Raman scattering: synergistic contribution of plasmons and charge transfer
TL;DR: In this article, a review of surface-enhanced Raman spectroscopy (SERS) active metal-semiconductor heterostructures including their building blocks, enhancement mechanisms, and applications is presented.
References
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TL;DR: In this paper, a detailed study of correlation effects in the oxygen atom was conducted, and it was shown that primitive basis sets of primitive Gaussian functions effectively and efficiently describe correlation effects.
Journal ArticleDOI
Long-range corrected hybrid density functionals with damped atom–atom dispersion corrections
Jeng-Da Chai,Martin Head-Gordon +1 more
TL;DR: The re-optimization of a recently proposed long-range corrected hybrid density functional, omegaB97X-D, to include empirical atom-atom dispersion corrections yields satisfactory accuracy for thermochemistry, kinetics, and non-covalent interactions.
Journal Article
Long-Range Corrected Hybrid Density Functionals with Damped Atom-Atom Dispersion Corrections
TL;DR: Chai and Head-Gordon as discussed by the authors proposed a long-range corrected (LC) hybrid density functional with Damped Atom-Atom Dispersion corrections, which is called ωB97X-D.
Journal ArticleDOI
Systematic optimization of long-range corrected hybrid density functionals.
Jeng-Da Chai,Martin Head-Gordon +1 more
TL;DR: The qualitative failures of the commonly used hybrid density functionals in some "difficult problems," such as dissociation of symmetric radical cations and long-range charge-transfer excitations, are significantly reduced by the present LC hybriddensity functionals.
Journal ArticleDOI
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