Article
Spectroscopy
Puspendu Barik, Saptarshi Pal, Manik Pradhan
Summary: A cost-efficient Raman substrate composed of PVP coated gold nanoparticles layer on commercial aluminum foil was successfully fabricated via direct spraying of nanoparticle colloidal solution. The substrate showed a detection limit of 1 nM and a maximum intensity enhancement factor of -24 during SERS for Rhodamine 6G, without any post-treatment. The field enhancement due to reflection from the metallic mirror contributes to the signal enhancement, making it beneficial for routine clinical applications and trace chemical detection.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2021)
Article
Biotechnology & Applied Microbiology
Zhouyang Xiang, Mengyun He, Li Li, Jamshed Bobokalonov, Abduvali Dzhonmurodov, Xingxiang Ji
Summary: In this study, a paper-based Au-Ag bimetallic SERS substrate was developed using cellulose fiber/paper-based technology. The substrate, anchored by natural macromolecule-xylan, showed high Raman enhancement performance and reproducibility. It can be used for rapid detection of agricultural product contaminants and pesticide residues on fruit surfaces.
FRONTIERS IN BIOENGINEERING AND BIOTECHNOLOGY
(2022)
Review
Chemistry, Analytical
Xue Pan, Lu Bai, Chengcheng Pan, Zhicheng Liu, Seeram Ramakrishna
Summary: This review discusses the fabrication methods and applications of SERS substrates based on electrospun nanofibers, and highlights the challenges and prospects.
CRITICAL REVIEWS IN ANALYTICAL CHEMISTRY
(2023)
Article
Nanoscience & Nanotechnology
Seung Mo Lee, Dong Hwan Nam, Dongkyu Lee, Soon Hyuk Lim, Sang Jun Son, Seunghyun Lee
Summary: The study successfully fabricated a highly ordered gold nanoparticle monomer array based on a gold-coated conical anodic aluminum oxide template, creating a ring-shaped hot line between the gold layer and AuNPs for enhanced surface-enhanced Raman scattering signal.
ACS APPLIED NANO MATERIALS
(2021)
Article
Nanoscience & Nanotechnology
Jong-Guk Ahn, Gyeonghun Yeo, Yeji Han, Younghee Park, Jong Wook Hong, Hyunseob Lim
Summary: Using an atomically thin hexagonal boron nitride (h-BN) shielding layer between Au nanoparticles and Au substrates can prevent electrical shorts, improving the sensitivity of Raman detection.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Physical
Saurabh Pandey, Shereena Joseph, Shital Devinder, Aditya Singh, Suddhasatwa Basu, Joby Joseph
Summary: We have designed a novel photoelectrode consisting of a one-dimensional porous grating of gold nanoparticles on top of an ITO waveguide, realizing a Schottky junction-free plasmonic-photonic hybrid photoelectrode. The photoelectrode generates photoelectrochemical photocurrent solely through plasmonic hole transfer to the molecules/ions at the metal-adsorbed water interface. The spectral overlapping of plasmonic activities with photonic modes and the porosity-induced large metal-electrolyte interface surface area further enhance charge generation and transfer. Compared to conventional gold bar grating photonic crystal and random gold nanoparticles photoelectrodes, the designed photoelectrode shows 3.4 and 12.6-fold increases in the incident photon to electron conversion efficiency (IPCE), respectively. The present study provides a facile strategy for tailoring plasmonic photocurrent generation in futuristic solar energy harvesting applications.
Article
Chemistry, Multidisciplinary
Niclas S. Mueller, Emanuel Pfitzner, Yu Okamura, Georgy Gordeev, Patryk Kusch, Holger Lange, Joachim Heberle, Florian Schulz, Stephanie Reich
Summary: Research shows that plasmonic supercrystals, with a high density of hotspots, are an excellent platform for enhancing vibrational spectra by increasing the cross section of Raman scattering and infrared absorption. The study demonstrates that the intensity of surface-enhanced Raman scattering inside the crystal is uniform and predictable, with supercrystal polaritons inducing resonances in the enhanced cross section for both Raman scattering and infrared absorption. The enhancement of infrared absorption within supercrystals is attributed to the combined effects of hotspot formation and the excitation of standing polariton waves.
Article
Chemistry, Multidisciplinary
Shu Hu, Jingyu Wang, Yue-Jiao Zhang, Bao-Ying Wen, Si-Si Wu, Petar M. Radjenovic, Zhilin Yang, Bin Ren, Jian-Feng Li
Summary: In this study, the shell and structural effect of shell-isolated nanoparticle-enhanced Raman spectroscopy (SHINERS) were investigated. It was found that the field enhancement loss due to the shell could be overcome by optimizing the coupling geometry of the shell-isolated nanoparticles (SHINs), and signal enhancement could be further optimized by altering the aggregation geometries of the nanoparticles.
Article
Optics
Koji Sugano, Katsunari Maruoka, Kohei Ikegami, Akio Uesugi, Yoshitada Isono
Summary: In this study, various nanostructures capable of generating multiple hotspots in a laser spot were fabricated through a random aggregation process using nanoparticles, allowing for the detection of multiple molecules. A single gold nanoparticle dimer with a single hotspot was successfully fabricated on a silicon substrate using a nanotrench-guided self-assembly technique. The Raman peaks of a single DNA oligomer composed of adenine, guanine, cytosine, phosphate, and deoxyribose were dynamically observed.
Article
Chemistry, Multidisciplinary
Josiah Shondo, Salih Veziroglu, Tim Tjardts, Tamim Bin Sarwar, Yogendra Kumar Mishra, Franz Faupel, Oral Cenk Aktas
Summary: A 4N-in-1 hybrid substrate concept for ultra-sensitive and reliable photo-induced-enhanced Raman spectroscopy is proposed, which shows a significant enhancement and high detection sensitivity. The substrate also exhibits superior photocatalytic degradation performance and reusability.
Article
Chemistry, Analytical
Nebu John, T. M. Anslin
Summary: The discovery of Raman effect in 1928 pioneered the development of spectroscopic technique, while the advancement of Raman effect on noble metal nanoparticles in the 1970s marked the origin of SERS technique. Fifty years later, SERS has flourished and made a significant impact in various fields of biomedical and biosensing applications.
VIBRATIONAL SPECTROSCOPY
(2023)
Article
Chemistry, Multidisciplinary
Buse Bilgin, Cenk Yanik, Hulya Torun, Mehmet Cengiz Onbasli
Summary: Surface-enhanced Raman spectroscopy (SERS) is a highly sensitive and molecule-specific detection technique that enhances Raman scattering from analytes using surface plasmon resonances. This study presents a genetic-algorithm (GA)-based optimization method for SERS substrates, demonstrating strong electric field localization over wide areas and validating model predictions. The optimized SERS substrates enable detailed Raman profile generation and could pave the way for photonic chips with arbitrary design constraints and performance targets.
Article
Chemistry, Multidisciplinary
Wenbing Li, Xin Tong, Zhuo Yang, Jiali Zhang, Bo Liu, Chao Ping Chen
Summary: Surface-enhanced Raman scattering (SERS) has attracted significant attention as a high sensitivity analytical method for molecule detection. This study compared the performance of AuNP/SiO2/Au/Sapphire substrate and AuNP/Si substrate in detecting molecules in Raman microscopy, with the former demonstrating improved sensitivity. Simulation using the finite-difference time-domain (FDTD) method provided insights into the enhanced sensitivity of the AuNP/SiO2/Au/Sapphire substrate, suggesting optimized parameters for further research.
Article
Chemistry, Multidisciplinary
Shiyu Sun, Jingying Zheng, Ruihao Sun, Dan Wang, Guanliang Sun, Xingshuang Zhang, Hongyu Gong, Yong Li, Meng Gao, Dongwei Li, Guanchen Xu, Xiu Liang
Summary: Defect-containing monolayer MoS2 with abundant density of states and effective photoinduced charge transfer resonance becomes a promising and versatile substrate capable of detecting a wide range of dye molecules and enhancing Raman enhancement.
Article
Nanoscience & Nanotechnology
Din Zelikovich, Shahar Dery, Netta Bruchiel-Spanier, Noam Tal, Pavel Savchenko, Elad Gross, Daniel Mandler
Summary: Nanoparticle-imprinted matrices (NAIMs) offer an innovative approach for efficient and selective recognition of nanoparticles. The recognition ability of NAIM systems depends on geometrical compatibility, matrix thickness, and supramolecular interactions. Experimental studies show high and selective reuptake ability of NAIM systems, driven by matrix-shell interactions. The findings pave the way for rational design of NAIM systems for sensing and separation technologies.
ACS APPLIED NANO MATERIALS
(2021)
Article
Biochemical Research Methods
Giada Caniglia, Andrea Teuber, Holger Barth, Boris Mizaikoff, Christine Kranz
Summary: This study investigates the relationship between the adhesion properties of polydopamine films and their surface charge density and pH using atomic force microscopy and attenuated total reflection-Fourier transform infrared spectroscopy. The study also explores the impact of polydopamine surface charge density on bacterial adhesion and biofilm formation.
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Yupeng Zhao, Dandan Gao, Si Liu, Johannes Biskupek, Ute Kaiser, Rongji Liu, Carsten Streb
Summary: Efficient and stable oxygen evolution reaction (OER) catalysts based on noble-metal-free materials are crucial for energy conversion and storage. This study demonstrated the conversion of polyoxometalate (POM)-doped ZIF-67 into a stable oxygen evolution electrocatalyst through chemical etching, cation exchange, and thermal annealing steps. Characterization techniques confirmed the synthesis of POM-doped ZIF-67 derived carbon-supported metal oxides, which exhibited structural and compositional advantages leading to low overpotential (306 mV at j=10 mA center dot cm(-2)) and long-term stability under harsh OER conditions (1.0 M aqueous KOH).
CHEMISTRY-A EUROPEAN JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Sebastian Knoll, Matthias Haenle, Alexander K. Mengele, Dieter Sorsche, Sven Rau, Carsten Streb
Summary: CLICK-chemistry is used to covalently link organic molecules with azides and alkynes. This study demonstrates the attachment of oligoaromatic organic moieties to Dawson-type polyoxometalates using CLICK-chemistry. The versatility and supramolecular chemistry of these systems are explored, and the charge-transfer behavior is found to depend on the size of the oligoaromatic pi-system.
CHEMISTRY-A EUROPEAN JOURNAL
(2023)
Article
Nanoscience & Nanotechnology
Daniel Costabel, Afshin Nabiyan, Avinash Chettri, Franz Jacobi, Magdalena Heiland, Julien Guthmuller, Stephan Kupfer, Maria Waechtler, Benjamin Dietzek-Ivansic, Carsten Streb, Felix H. Schacher, Kalina Peneva
Summary: We present a photocatalytic setup using the organic photosensitizer diiodo-BODIPY, the non-precious-metal-based hydrogen evolution reaction catalyst (NH4)2[Mo3S13], and a polyampholytic unimolecular matrix poly(dehydroalanine)-graft-poly(ethylene glycol) in water. The system exhibits remarkable performance with high turnover numbers (TON > 7300) and turnover frequencies (TOF > 450 h-1), comparable to noble-metal-containing systems. Excited-state absorption spectra confirm the formation of a long-lived triplet state of the photosensitizer in both water and organic media. This system serves as a blueprint for developing noble-metal-free hydrogen evolution reaction in water, allowing for component optimization by modifying the substituent of the photosensitizer and the composition of the catalyst.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Editorial Material
Chemistry, Multidisciplinary
Carsten Streb
Summary: The atomically precise assembly of metal nanoparticles provides great opportunities for materials chemistry. Ring-shaped polyoxometalates have been used to stabilize Ag-30 nanoparticles with exposed surfaces.
Article
Optics
Dominik Theiner, Benedikt Limbacher, Michael Jaidl, Marie Ertl, Michael Hlavatsch, Karl Unterrainer, Boris Mizaikoff, Juraj Darmo
Summary: We present a flexible molecular sensing platform in the terahertz range, achieved by merging near-infrared electro-optic modulation and photomixing technologies. The platform utilizes a new generation of compact gas cells called substrate-integrated hollow waveguides (iHWGs), which have been developed for the mid-infrared. We demonstrate the suitability of iHWGs for the terahertz domain by showcasing their low propagation losses and measuring rotational transitions of nitrous oxide (N2O). A fast frequency sideband modulation technique is employed, resulting in significantly reduced measurement times and increased accuracy compared to a standard wavelength tuning method.
Article
Chemistry, Multidisciplinary
Andrea Teuber, Giada Caniglia, Michael Wild, Matthias Godejohann, Christine Kranz, Boris Mizaikoff
Summary: Diamond thin-film waveguides with a nanocrystalline diamond layer were used to detect the IR signature of caffeine in the mid-infrared regime. The morphological properties of the waveguides were characterized using AFM and SEM, and theoretical simulations confirmed the feasibility of using a larger sensing area compared to strip waveguides. A comparative analysis confirmed the performance of the diamond thin-film-waveguide-based sensing system, indicating its potential for various applications.
Review
Chemistry, Multidisciplinary
Samar Batool, Marcel Langer, Stephen Nagaraju Myakala, Magdalena Heiland, Dominik Eder, Carsten Streb, Alexey Cherevan
Summary: This review summarizes prominent examples of thiomolybdate-based electro- and photocatalysis and provides a comprehensive analysis of their reactivities under homogeneous and heterogenized conditions. The study examines the active sites of thiomolybdates relevant for the hydrogen evolution reaction and discusses the shift from solution-phase to surface-supported thiomolybdates with a focus on applications in electrocatalysis and photocatalysis.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Shujun Li, Yubin Ma, Yue Zhao, Rongji Liu, Yupeng Zhao, Xusheng Dai, Nana Ma, Carsten Streb, Xuenian Chen
Summary: The study demonstrates the activation of molecular hydrogen by polyoxometalate (POM)-based heterogeneous compounds functionalized with Platinum particles. The synergism between a hydrogen spillover mechanism and electron-proton transfer by the POM enables the selective catalytic reduction of olefins and nitroarenes with high functional group tolerance.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Multidisciplinary Sciences
Stefan Repp, Moritz Remmers, Alexandra Stefanie Jessica Rein, Dieter Sorsche, Dandan Gao, Montaha Anjass, Mihail Mondeshki, Luca M. Carrella, Eva Rentschler, Carsten Streb
Summary: In this study, a coupled set of light-dependent and light-independent reaction equilibria controlling the mono- and di- metal-functionalization of a prototype molecular vanadium oxide cluster is reported. Mechanistic analyses reveal that coordination of a Mg2+ ion leads to the formation of mono-functionalized compound and release of a placeholder cation. Irradiation with visible light results in one-electron reduction, exchange of the second placeholder cation, and formation/crystallization of the di-metal-functionalized compound. Furthermore, the study demonstrates the feasibility of applying this synthetic concept to other metal cations.
NATURE COMMUNICATIONS
(2023)
Article
Chemistry, Analytical
Michael Hlavatsch, Andrea Teuber, Max Eisele, Boris Mizaikoff
Summary: In this study, the combination of a tunable broadband mid-infrared femtosecond laser source with different sensors for liquid and gas samples is demonstrated. The light source is highly sensitive and suitable for quantitative analysis.
ACS MEASUREMENT SCIENCE AU
(2023)
Article
Chemistry, Analytical
Tingting Zhang, Rui Lu, Gongying Wang, Xiuyun Sun, Jiansheng Li, Boris Mizaikoff
Summary: A facile and sensitive glucose sandwich assay using surface-enhanced Raman scattering (SERS) was developed. Glucose was captured by 3-aminopheyonyl boronic acid (APBA) modified Ag nanoparticles decorated onto a polyamide surface. APBA forms specific cis-diol compounds with glucose molecules avoiding interference by other saccharides and biomolecules in urine enabling its selective detection. AEPO exhibited a distinctive SERS peak in the Raman silent region, thus increasing the sensitivity of the glucose detection to 10(-11) M. The developed SERS assay was reusable and showed potential as a diagnostic tool for glucose sensing in clinical applications.
Article
Chemistry, Physical
Jonas Eichhorn, Patricia Hofmann, Benedikt Bagemihl, Carsten Streb, Sven Rau, Felix H. Schacher
Summary: In this study, molecular ruthenium (II) photosensitizers were covalently embedded within block copolymer micelles for light-driven catalysis with excellent performance in hydrogen evolution reaction (HER) using molecularly dissolved thiomolybdate clusters. The block copolymers, PS-b-P(ClHPMA-co-MMS) and PS-b-P(bpyHPMA-co-MMS), were synthesized and functionalized with ruthenium (II) polypyridyl complex, and self-assembled into ruthenium-functionalized block copolymer micelles. The colloidal system outperformed the homogeneous reference in the hydrogen evolution reaction.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Chemistry, Inorganic & Nuclear
Stefan Repp, Kim Lara Junginger, Dieter Sorsche, Theresa Zorn, Ann-Christin Poeppler, Yuji Kikukawa, Yoshihito Hayashi, Carsten Streb
Summary: The self-assembly of polyoxometalates (POMs), molecular metal oxides, can be controlled by internal or external templates. This study explores how the interaction between internal templates (halides, oxoanions) and external organic templates (protonated cyclene species) affects the self-assembly of a model polyoxovanadate cluster. Crystallographic analyses, spectroscopic studies, and V-51 NMR spectroscopy provide insights into the formation of an intermediate vanadate species during the process. These findings contribute to the development of template-driven synthetic chemistry of polyoxovanadates.
DALTON TRANSACTIONS
(2023)
