Single-Step Organization of Plasmonic Gold Metamaterials with Self-Assembled DNA Nanostructures

Ren, Shaokang; Wang, Jun; Song, Chunyuan; Li, Qian; Yang, Yanjun; Teng, Nan; Su, Shao; Zhu, Dan; Huang, Wei; Chao, Jie; Wang, Lianhui; Fan, Chunhai

doi:10.34133/2019/7403580

Cited by 34 publications

(30 citation statements)

References 43 publications

(45 reference statements)

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“…As discussed in Introduction, the general idea to model the light-matter interactions and the resulting electromagnetic field distribution is mainly based on solving coherent charge density oscillations using classical electromagnetic theory by applying Maxwell's equations [4]. By shrinking the interparticle distance down to nanoscales, localization and intensity of the incident electric field can be enhanced [53][54][55]. Nevertheless, when the system requires to operate beyond the nanometer gap regime (i.e., subnanometer openings) or contains a quantum topology (e.g., quantum dots, molecules, or atoms), nonlocal screening effects (due to quantum nature of electron) modify the plasmonic response of structure [56].…”

Section: Charge Transfer Plasmons In Nonlocal and Quantum Regimesmentioning

confidence: 99%

Functional Charge Transfer Plasmon Metadevices

Gerislioglu

Ahmadivand

2020

Research

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Reducing the capacitive opening between subwavelength metallic objects down to atomic scales or bridging the gap by a conductive path reveals new plasmonic spectral features, known as charge transfer plasmon (CTP). We review the origin, properties, and trending applications of this modes and show how they can be well-understood by classical electrodynamics and quantum mechanics principles. Particularly important is the excitation mechanisms and practical approaches of such a unique resonance in tailoring high-response and efficient extreme-subwavelength hybrid nanophotonic devices. While the quantum tunneling-induced CTP mode possesses the ability to turn on and off the charge transition by varying the intensity of an external light source, the excited CTP in conductively bridged plasmonic systems suffers from the lack of tunability. To address this, the integration of bulk plasmonic nanostructures with optothermally and optoelectronically controllable components has been introduced as promising techniques for developing multifunctional and high-performance CTP-resonant tools. Ultimate tunable plasmonic devices such as metamodulators and metafilters are thus in prospect.

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Section: Charge Transfer Plasmons In Nonlocal and Quantum Regimesmentioning

confidence: 99%

Functional Charge Transfer Plasmon Metadevices

Gerislioglu

Ahmadivand

2020

Research

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“…, uric acid, H 2 O 2 , glucose), biomacromolecules ( e.g. , nucleic acids, peptides, proteins, enzymes), cells, bacteria, and viruses [ [3] , [4] , [5] , [6] , [7] ]. Biosensors with good selectivity, high sensitivity and fast response have broad prospects in clinical testing of biological indices and for the treatment of various diseases [ 1 ].…”

Section: Introductionmentioning

confidence: 99%

Responsive principles and applications of smart materials in biosensing

Guo

Liu

Dai

et al. 2020

Smart Materials in Medicine

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Biosensing is a rising analytical field for detection of biological indicators using transducing systems. Smart materials can response to external stimuli, and translate the stimuli from biological domains into signals that are readable and quantifiable. Smart materials, such as nanomaterials, photonic crystals and hydrogels have been widely used for biosensing purpose. In this review, we illustrate the incorporation of smart materials in biosensing systems, including the design of responsive materials, their responsive mechanism of biosensing, and their applications in detection of four types of common biomolecules (including glucose, nucleic acids, proteins, and enzymes). In the end, we also illustrate the current challenges and prospective of using smart materials in biosensing research fields.

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“…Featured with ultrasensitive detection, quick analyzing time, and nondestructive analysis, SERS has been widely utilized in biological sensing, chemical analysis, and bioimaging [49][50][51][52]. Conventional SERS probes are generally noble metal-based (e.g., Au or Ag) nanostructures, mainly including substrate (e.g., SERS chips) [53,54] or passive nanoparticles (AuNPs or AgNPs) [55][56][57][58] that can induce surface plasma resonance to enhance the Raman signal. For biochemical sensing applications, either analytes are dosed onto the SERS substrate or a large amount of SERS nanoprobes like AuNPs or AgNPs were added into the analyte sample.…”

Section: Introductionmentioning

confidence: 99%

Magnetic Nanomotor-Based Maneuverable SERS Probe

et al. 2020

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Surface-enhanced Raman spectroscopy (SERS) is a powerful sensing technique capable of capturing ultrasensitive fingerprint signal of analytes with extremely low concentration. However, conventional SERS probes are passive nanoparticles which are usually massively applied for biochemical sensing, lacking controllability and adaptability for precise and targeted sensing at a small scale. Herein, we report a “rod-like” magnetic nanomotor-based SERS probe (MNM-SP) that integrates a mobile and controllable platform of micro-/nanomotors with a SERS sensing technique. The “rod-like” structure is prepared by coating a thin layer of silica onto the self-assembled magnetic nanoparticles. Afterwards, SERS hotspots of silver nanoparticles (AgNPs) are decorated as detecting nanoprobes. The MNM-SPs can be navigated on-demand to avoid obstacles and target sensing sites by the guidance of an external gradient magnetic field. Through applying a rotating magnetic field, the MNM-SPs can actively rotate to efficiently stir and mix surrounding fluid and thus contact with analytes quickly for SERS sensing. Innovatively, we demonstrate the self-cleaning capability of the MNM-SPs which can be used to overcome the contamination problem of traditional single-use SERS probes. Furthermore, the MNM-SPs could precisely approach the targeted single cell and then enter into the cell by endocytosis. It is worth mentioning that by the effective mixing of intracellular biocomponents, much more informative Raman signals with improved signal-to-noise ratio can be captured after active rotation. Therefore, the demonstrated magnetically activated MNM-SPs that are endowed with SERS sensing capability pave way to the future development of smart sensing probes with maneuverability for biochemical analysis at the micro-/nanoscale.

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Single-Step Organization of Plasmonic Gold Metamaterials with Self-Assembled DNA Nanostructures

Cited by 34 publications

References 43 publications

Functional Charge Transfer Plasmon Metadevices

Functional Charge Transfer Plasmon Metadevices

Responsive principles and applications of smart materials in biosensing

Magnetic Nanomotor-Based Maneuverable SERS Probe

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