Sensitive SERS detection at the single-particle level based on nanometer-separated mushroom-shaped plasmonic dimers

Xiang, Quan; Li, Zhiqin; Zheng, Mengjie; Liu, Qing; Chen, Yiqin; Yang, Lan; Jiang, Tian; Duan, Huigao

doi:10.1088/1361-6528/aaa691

Cited by 19 publications

(12 citation statements)

References 31 publications

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“…Thus, the HS of a NP dimer has been widely accepted as a platform to realize SM-SERS research. Various types of dimers (gold, silver, gold and silver, and core@shell NP dimers; nanocube (NC) dimers; and their hybrid dimers) have been used for SM-SERS. ,− These dimers have also been examined for other surface-enhanced spectroscopies, such as surface-enhanced fluorescence (SEF), surface-enhanced hyper Raman scattering (SEHRS), and other techniques. , …”

Section: Nanometer To Subnanometer Sers Hssmentioning

confidence: 99%

Toward a New Era of SERS and TERS at the Nanometer Scale: From Fundamentals to Innovative Applications

et al. 2023

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Surface-enhanced Raman scattering (SERS) and tip-enhanced Raman scattering (TERS) have opened a variety of exciting research fields. However, although a vast number of applications have been proposed since the two techniques were first reported, none has been applied to real practical use. This calls for an update in the recent fundamental and application studies of SERS and TERS. Thus, the goals and scope of this review are to report new directions and perspectives of SERS and TERS, mainly from the viewpoint of combining their mechanism and application studies. Regarding the recent progress in SERS and TERS, this review discusses four main topics: (1) nanometer to subnanometer plasmonic hotspots for SERS; (2) Ångström resolved TERS; (3) chemical mechanisms, i.e., charge-transfer mechanism of SERS and semiconductor-enhanced Raman scattering; and (4) the creation of a strong bridge between the mechanism studies and applications.

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Section: Nanometer To Subnanometer Sers Hssmentioning

confidence: 99%

Toward a New Era of SERS and TERS at the Nanometer Scale: From Fundamentals to Innovative Applications

et al. 2023

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Section: Mechanical Crackingmentioning

confidence: 99%

“…The lateral growth that occurs in vacuum deposition can also be applied to perform controllable separation. As depicted in figure 15(b), vacuum evaporation was used to shrink the separation of clustered structures [200,201]. The edge roughness of the resultant structure is better than that defined by electrodeposition.…”

Section: Additive Post-trimmingmentioning

confidence: 99%

Sub-10 nm fabrication: methods and applications

Chen

Shu

Zhang

et al. 2021

Int. J. Extrem. Manuf.

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145

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Reliable fabrication of micro/nanostructures with sub-10 nm features is of great significance for advancing nanoscience and nanotechnology. While the capability of current complementary metal-oxide semiconductor (CMOS) chip manufacturing can produce structures on the sub-10 nm scale, many emerging applications, such as nano-optics, biosensing, and quantum devices, also require ultrasmall features down to single digital nanometers. In these emerging applications, CMOS-based manufacturing methods are currently not feasible or appropriate due to the considerations of usage cost, material compatibility, and exotic features. Therefore, several specific methods have been developed in the past decades for different applications. In this review, we attempt to give a systematic summary on sub-10 nm fabrication methods and their related applications. In the first and second parts, we give a brief introduction of the background of this research topic and explain why sub-10 nm fabrication is interesting from both scientific and technological perspectives. In the third part, we comprehensively summarize the fabrication methods and classify them into three main approaches, including lithographic, mechanics-enabled, and post-trimming processes. The fourth part discusses the applications of these processes in quantum devices, nano-optics, and high-performance sensing. Finally, a perspective is given to discuss the challenges and opportunities associated with this research topic.

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“…Efforts to make use of the enhancement capability of dimers are still very lively in literature, which can be documented by numerous studies from the last years [ 67 , 68 , 69 , 70 , 71 , 72 , 73 , 74 ], benefiting from extremely high enhancement between two adjacent metallic NPs or between a metallic NP and a substrate. A very promising analytical tool for biosensing applications include DNA origami, [ 75 , 76 , 77 ] where NPs with defined distance can be constructed.…”

Section: Polarization Effects For Molecules On Plasmonic Nanostrucmentioning

confidence: 99%

Polarization- and Angular-Resolved Optical Response of Molecules on Anisotropic Plasmonic Nanostructures

Šubr

Procházka

2018

Nanomaterials

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A sometimes overlooked degree of freedom in the design of many spectroscopic (mainly Raman) experiments involve the choice of experimental geometry and polarization arrangement used. Although these aspects usually play a rather minor role, their neglect may result in a misinterpretation of the experimental results. It is well known that polarization- and/or angular- resolved spectroscopic experiments allow one to classify the symmetry of the vibrations involved or the molecular orientation with respect to a smooth surface. However, very low detection limits in surface-enhancing spectroscopic techniques are often accompanied by a complete or partial loss of this detailed information. In this review, we will try to elucidate the extent to which this approach can be generalized for molecules adsorbed on plasmonic nanostructures. We will provide a detailed summary of the state-of-the-art experimental findings for a range of plasmonic platforms used in the last ~ 15 years. Possible implications on the design of plasmon-based molecular sensors for maximum signal enhancement will also be discussed.

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Sensitive SERS detection at the single-particle level based on nanometer-separated mushroom-shaped plasmonic dimers

Cited by 19 publications

References 31 publications

Toward a New Era of SERS and TERS at the Nanometer Scale: From Fundamentals to Innovative Applications

Toward a New Era of SERS and TERS at the Nanometer Scale: From Fundamentals to Innovative Applications

Sub-10 nm fabrication: methods and applications

Polarization- and Angular-Resolved Optical Response of Molecules on Anisotropic Plasmonic Nanostructures

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