Plasmofluidic single-molecule surface-enhanced Raman scattering from dynamic assembly of plasmonic nanoparticles
Partha Pratim Patra,Rohit Chikkaraddy,Ravi P. N. Tripathi,Arindam Dasgupta,G. V. Pavan Kumar +4 more
TLDR
By utilizing dual excitation of plasmons at metal-fluid interface, this work creates interacting assemblies of metal nanoparticles, which may be further harnessed in dynamic lithography of dispersed nanostructures and have implications in realizing optically addressable, plasmofluidic, single-molecule detection platforms.Abstract:
Single-molecule surface-enhanced Raman scattering (SM-SERS) is one of the vital applications of plasmonic nanoparticles. The SM-SERS sensitivity critically depends on plasmonic hot-spots created at the vicinity of such nanoparticles. In conventional fluid-phase SM-SERS experiments, plasmonic hot-spots are facilitated by chemical aggregation of nanoparticles. Such aggregation is usually irreversible, and hence, nanoparticles cannot be re-dispersed in the fluid for further use. Here, we show how to combine SM-SERS with plasmon polariton-assisted, reversible assembly of plasmonic nanoparticles at an unstructured metal–fluid interface. One of the unique features of our method is that we use a single evanescent-wave optical excitation for nanoparticle assembly, manipulation and SM-SERS measurements. Furthermore, by utilizing dual excitation of plasmons at metal–fluid interface, we create interacting assemblies of metal nanoparticles, which may be further harnessed in dynamic lithography of dispersed nanostructures. Our work will have implications in realizing optically addressable, plasmofluidic, single-molecule detection platforms. Plasmonic hot-spot generation in solution is not reversible for single-molecule surface-enhanced Raman scattering, which limits its applications. Patra et al.tackle this problem by integrating this technique with thermo-plasmon-assisted reconfiguration of nanoparticles at a metal–fluid interface.read more
Citations
More filters
Journal ArticleDOI
Giant optical anisotropy in transition metal dichalcogenides for next-generation photonics.
Georgy A. Ermolaev,D. V. Grudinin,Y. V. Stebunov,Kirill V. Voronin,Kirill V. Voronin,Vasyl G. Kravets,Jiahua Duan,Arslan B. Mazitov,Gleb Tselikov,Andrei Bylinkin,Dmitry I. Yakubovsky,Sergey M. Novikov,Denis G. Baranov,Denis G. Baranov,Alexey Y. Nikitin,Alexey Y. Nikitin,Alexey Y. Nikitin,Ivan A. Kruglov,Timur Shegai,Pablo Alonso-González,Alexander N. Grigorenko,Aleksey V. Arsenin,Kostya S. Novoselov,Kostya S. Novoselov,Valentyn S. Volkov +24 more
TL;DR: It is demonstrated that layered transition metal dichalcogenides (TMDCs) provide an answer to this quest owing to their fundamental differences between intralayer strong covalent bonding and weak interlayer van der Waals interaction enabling an avenue for on-chip next-generation photonics.
Journal ArticleDOI
The landscape of DNA methylation amid a perfect storm of autism aetiologies
TL;DR: Genome-wide studies of gene sequences, gene pathways and DNA methylation are providing valuable mechanistic insights into ASD, suggesting pathways that are central to this 'perfect storm' will be crucial to improving the diagnosis and treatment of ASD.
Journal ArticleDOI
Emerging rare-earth doped material platforms for quantum nanophotonics
Tian Zhong,Philippe Goldner +1 more
TL;DR: In this article, the authors summarized the latest progress towards nanoscale, low-dimensional rare-earth doped materials for enabling next generation rare earth quantum devices, and compared different platforms with a variety of synthesis methods.
Journal ArticleDOI
Recent advances in black phosphorus-based electrochemical sensors: A review
Qing Li,Jingtao Wu,Ying Liu,Xiao-Man Qi,Hong-Guang Jin,Chun Yang,Jun Liu,Guangli Li,Quanguo He +8 more
TL;DR: The typical synthesis methods for BP-based crystals, nanosheets, and quantum dots are discussed in detail; the degradation of BP under ambient conditions is introduced; and state-of-the-art protection methodologies for enhancing BP stability are explored.
Journal ArticleDOI
Electrochemical conversion of carbon dioxide into renewable fuel chemicals – The role of nanomaterials and the commercialization
TL;DR: In this paper, the role of CO 2 in dealing with the energy and global warming related problems, the fundamental understandings of electrochemical reduction of CO2 (ERC), and role of nanomaterials and reverse microbial fuel cells (R-MFC) on ERC were discussed.
References
More filters
Journal ArticleDOI
Optical Constants of the Noble Metals
P. B. Johnson,R. W. Christy +1 more
TL;DR: In this paper, the optical constants for the noble metals (copper, silver, and gold) from reflection and transmission measurements on vacuum-evaporated thin films at room temperature, in the spectral range 0.5-6.5 eV.
Journal ArticleDOI
Surface plasmon subwavelength optics
TL;DR: By altering the structure of a metal's surface, the properties of surface plasmons—in particular their interaction with light—can be tailored, which could lead to miniaturized photonic circuits with length scales that are much smaller than those currently achieved.
Journal ArticleDOI
Probing Single Molecules and Single Nanoparticles by Surface-Enhanced Raman Scattering
Shuming Nie,Steven R. Emory +1 more
TL;DR: In this article, surface-enhanced Raman scattering was used to detect single molecules and single nanoparticles at room temperature with the use of surface enhanced Raman, and the intrinsic Raman enhancement factors were on the order of 10 14 to 10 15, much larger than the ensemble-averaged values derived from conventional measurements.
Journal ArticleDOI
Single Molecule Detection Using Surface-Enhanced Raman Scattering (SERS)
Katrin Kneipp,Katrin Kneipp,Yang Wang,Yang Wang,Harald Kneipp,Harald Kneipp,Lev T. Perelman,Lev T. Perelman,Irving Itzkan,Irving Itzkan,Ramachandra R. Dasari,Ramachandra R. Dasari,Michael S. Feld,Michael S. Feld +13 more
TL;DR: In this article, the first observation of single molecule Raman scattering was made using a single crystal violet molecule in aqueous colloidal silver solution using one second collection time and about $2.
Journal ArticleDOI
Biosensing with plasmonic nanosensors
TL;DR: This paper introduces the localized surface plasmon resonance (LSPR) sensor and describes how its exquisite sensitivity to size, shape and environment can be harnessed to detect molecular binding events and changes in molecular conformation.