Probing the Location of 3D Hot Spots in Gold Nanoparticle Films Using Surface-Enhanced Raman Spectroscopy

Zhang, Yuejiao; Chen, Shu; Radjenovic, Petar M.; Bodappa, Nataraju; Zhang, Hua; Yang, Zhilin; Zhang, Tian; Li, Jianfeng

doi:10.1021/acs.analchem.9b00200

Cited by 48 publications

(28 citation statements)

References 43 publications

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“…The self‐assembly 3D Au/Ag structure could improve the SERS activity by increasing a large number of hot spots 47–51 . Tian et al 52 evaporated a droplet of citrate‐Ag sols on a fluorosilicate silicon wafer, and a large number of hot spots in 3D space were produced during the evaporation process (Figure 3E).…”

Section: Smart Design Of Noble Metal Substratesmentioning

confidence: 99%

Smart design of high‐performance surface‐enhanced Raman scattering substrates

Meng

Qiu

et al. 2021

SmartMat

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Surface‐enhanced Raman scattering (SERS) spectroscopy has renowned its fame for the ultra‐high sensitivity and single‐molecule detection ability, and listed as a fingerprint spectrum representative in various trace detection fields. Considerable efforts have been made by researchers to design high‐sensitive SERS‐active substrates ranging from noble metals to semiconductors. This review summarizes the fundamental theories for SERS technique, that is, the electromagnetic enhancement mechanism and chemical enhancement mechanism and the state‐of‐the‐art design strategies for noble metal and semiconductor substrates. It also sheds light on the effective approaches to improve the SERS activity for noble metal substrates, that is, tuning the localized surface plasmon resonance position, the assembling of hot spots, and precise controlling of nanogaps. Although charge transfer is considered as the main reason for the enhancement mechanism for semiconductors at the present stage, the underlying theoretical basis remains mysterious. This review summarized the critical points for SERS‐active substrates design and prospected the future development direction of SERS technology.

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Section: Smart Design Of Noble Metal Substratesmentioning

confidence: 99%

Smart design of high‐performance surface‐enhanced Raman scattering substrates

Meng

Qiu

et al. 2021

SmartMat

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“…The target gas was exposed to the sensor before Raman spectra were collected. It is known that regions on the SERS sensor have hotspots with different signal enhancements [ 50 ]. Hence, point-to-point reproducibility across a SERS senor is vital to precisely assess the sensitivity of the sensor.…”

Section: Resultsmentioning

confidence: 99%

SERS Gas Sensors Based on Multiple Polymer Films with High Design Flexibility for Gas Recognition

Chen

Guo

Sassa

et al. 2021

Sensors

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The Surface-Enhanced Raman Scattering (SERS) technique is utilized to fabricate sensors for gas detection due to its rapid detection speed and high sensitivity. However, gases with similar molecular structures are difficult to directly discriminate using SERS gas sensors because there are characteristic peak overlaps in the Raman spectra. Here, we proposed a multiple SERS gas sensor matrix via a spin-coating functional polymer to enhance the gas recognition capability. Poly (acrylic acid) (PAA), Poly (methyl methacrylate) (PMMA) and Polydimethylsiloxane (PDMS) were employed to fabricate the polymer film. The high design flexibility of the two-layer film was realized by the layer-by-layer method with 2 one-layer films. The SERS gas sensor coated by different polymer films showed a distinct affinity to target gases. The principle component analysis (PCA) algorithm was used for the further clustering of gas molecules. Three target gases, phenethyl alcohol, acetophenone and anethole, were perfectly discriminated, as the characteristic variables in the response matrix constructed by the combination of gas responses obtained 3 one-layer and 3 two-layer film-coated sensors. This research provides a new SERS sensing approach for recognizing gases with similar molecular structures.

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“…We prepared Au@probe@SiO 2 core‐shell nanostructures and constructed a hot spot model in 3D structure by the tightly stacking monolayer films, which were constructed by the Au nanoparticles through a continuous layer deposition method (Figure 3A). [ 15 ] We chose three kinds of probe molecules with different Raman spectral characteristics and the exact position of hot spots was controlled by varying the excitation lasers. Combining the experiment results with theoretical simulations, the conclusion was obvious that the migration of hot spots among various layers was influenced by the wavelength of the excitation light.…”

Section: Applications Of Core‐shell Nanostructuresmentioning

confidence: 99%

Plasmonic Core‐Shell Nanostructures Enhanced Spectroscopies

et al. 2021

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Comprehensive Summary Core‐shell nanostructures constituted by a plasmonic core and an ultrathin shell have drawn enormous attentions in enhanced spectroscopies, catalysis, energy, and other fields because of their splendid properties such as multifunctionality, stability, and adjustability. In this article, we summarized the endeavors made by our group in the past decade about the core‐shell nanostructures in the shell‐isolated nanoparticle‐enhanced Raman spectroscopy (SHINERS) and plasmon‐enhanced spectroscopies. Meanwhile, the potential challenges and perspectives about core‐shell nanostructures in spectroscopies have also been proposed. Thus, we believe this article would provide an avenue for a comprehensive understanding of enhanced spectroscopies with core‐shell nanostructures. What is the most favorite and original chemistry developed in your research group?? Core‐shell nanostructure enhanced Raman spectroscopy for surface analysis. How do you get into this specific field? Could you please share some experiences with our readers?? I started the studies on Raman spectroscopy since I was a Ph.D. candidate. I think most researchers should concentrate on specific fields, especially those that can hardly be solved by others, and make constant research on them. How do you supervise your students?? First, give highly challenging or unique topics to students. Then, make detailed plans for them and supervise them to execute the plans. What is the most important personality for scientific research?? Insistence and diligence. What are your hobbies? What's your favorite book(s)? Playing computer games. My favorite book is State of Divinity (笑傲江湖), by Louis Cha. What is your favorite journal(s)? The journals report systematic and pioneer works on chemistry, materials, or energy, etc.

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Probing the Location of 3D Hot Spots in Gold Nanoparticle Films Using Surface-Enhanced Raman Spectroscopy

Cited by 48 publications

References 43 publications

Smart design of high‐performance surface‐enhanced Raman scattering substrates

Smart design of high‐performance surface‐enhanced Raman scattering substrates

SERS Gas Sensors Based on Multiple Polymer Films with High Design Flexibility for Gas Recognition

Plasmonic Core‐Shell Nanostructures Enhanced Spectroscopies

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