Synergistic Effects of Wrinkled Graphene and Plasmonics in Stretchable Hybrid Platform for Surface‐Enhanced Raman Spectroscopy

Gui, Xuchun; Zheng, Yongjia; Liang, Binghao; Lin, Zhiqiang; Zhao, Chengchun; Chen, Huanjun; Chen, Zefeng; Li, Xinming; Tang, Zikang

doi:10.1002/adom.201600715

Cited by 33 publications

(16 citation statements)

References 44 publications

(56 reference statements)

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“…As expected, the graphene/bilayer silver/Cu sandwich structure exhibits much better SERS signal and shows 1.48-fold enhancement than that of a bilayer silver/Cu substrate, which is probably due to more hot spots offered by graphene wrinkles and the improvement of electromagnetic field. , By comparison, the SERS EF of our graphene/bilayer silver/Cu sandwich is greater than that of Cu/AgD@G, for which the EF value was estimated to be 3.7 × 10 5 . The similar synergistic enhancement effect of graphene and metal nanostructures is observed in the graphene/Au NPs, graphene/Ag/Si, and graphene/Au or Ag NPs substrates …”

Section: Resultssupporting

confidence: 71%

Rationally Designed Graphene/Bilayer Silver/Cu Hybrid Structure with Improved Sensitivity and Stability for Highly Efficient SERS Sensing

et al. 2018

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A simple and cost-effective strategy was rationally designed to fabricate a special sandwich structure consisting of graphene, bilayer silver, and a copper plate, which was used as a surface-enhanced Raman scattering (SERS) substrate for highly efficient SERS sensing and detection of trace molecules. Silver dendrite (AgD) nanostructures were subsequently grown on a silver nanosphere (AgNS)/Cu surface to form a bilayer silver/Cu structure, which showed a 1.5-fold Raman enhancement compared to that of the AgNS/Cu substrate. After depositing graphene on the bilayer silver/Cu substrate to obtain a sandwich structure, a higher SERS enhancement and better durability were enabled. The SERS performances, measured by a portable Raman instrument, showed that the optimized sandwich structure substrate exhibited high SERS sensitivity to crystal violet (CV) and rhodamine 6G (R6G) with low limit of detection of 10 –9 and 10 –8 M, respectively. Such a sandwich-structured substrate exhibited good reproducibility across the entire detection areas with an average relative standard deviation less than 5.9%, which permits its reliable quantitative detection of CV and R6G molecules. In addition, graphene both effectively improved the SERS performances and protected Ag nanocrystals from oxidation, which endowed the sandwich structure a long-term stability with deviation of characteristic peaks’ intensity lower than 3.6% after 25 days. This study indicates that the graphene/bilayer silver/Cu sandwich structure as a SERS substrate has a great potential in detecting environmental pollutants.

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Section: Resultssupporting

confidence: 71%

Rationally Designed Graphene/Bilayer Silver/Cu Hybrid Structure with Improved Sensitivity and Stability for Highly Efficient SERS Sensing

et al. 2018

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“…In addition, the morphology of the Cu nanocrystals could be effectively controlled by tuning the amount of HDA to adjust the total/local surface free energy. Owing to the sharp tips and the narrow gaps of the 3D structure, which enhance the electromagnetic field dramatically, herein the Cu nanocrystals show pronounced SERS behaviors, whose EF value reaches ranging from 10 5 to 10 7 , which is higher than the values found in most studies, even comparable to some Ag‐, Au‐, and metal hybrid substrates . In addition, simulation work shows that electric fields locating at tips as well as narrow gaps between swords are dramatically enhanced.…”

Section: Introductionmentioning

confidence: 74%

High‐Performance SERS Substrate Based on Hierarchical 3D Cu Nanocrystals with Efficient Morphology Control

Zhao

Deng

Rao

et al. 2018

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Cu nanocrystals of various shapes are synthesized via a universal, eco-friendly, and facile colloidal method on Al substrates using hexadecylamine (HDA) as a capping agent and glucose as a reductant. By tuning the concentration of the capping agent, hierarchical 3D Cu nanocrystals show pronounced surface-enhanced Raman scattering (SERS) through the concentrated hot spots at the sharp tips and gaps due to the unique 3D structure and the resulting plasmonic couplings. Intriguingly, 3D sword-shaped Cu crystals have the highest enhancement factor (EF) because of their relatively uniform size distribution and alignment. This work opens new pathways for efficiently realizing morphology control for Cu nanocrystals as highly efficient SERS platforms.

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“…Especially, in recent years, the SERS systems constructed from soft/flexible materials have drawn increasing attentions owing to their distinct merits for real‐time point‐of‐care (POC) diagnostics. Currently, the flexible SERS platforms are primarily classified into i) actively tunable SERS, ii) swab‐sampling strategy as well as iii) in situ SERS monitoring means . Among them, the in situ SERS detection based on the flexible substrates is considered as the most promising approach, which is performed by first conformally attaching the flexible SERS substrates onto objective surfaces of interest, followed by the excitation of incident photons and collection of Raman signals from the back side of the SERS substrates.…”

Section: Various Categories Of Flexible Sensorsmentioning

confidence: 99%

Multifunctional Skin‐Inspired Flexible Sensor Systems for Wearable Electronics

Takei

2019

Adv Materials Technologies

508

332

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Skin‐inspired wearable devices hold great potentials in the next generation of smart portable electronics owing to their intriguing applications in healthcare monitoring, soft robotics, artificial intelligence, and human–machine interfaces. Despite tremendous research efforts dedicated to judiciously tailoring wearable devices in terms of their thickness, portability, flexibility, bendability as well as stretchability, the emerging Internet of Things demand the skin‐interfaced flexible systems to be endowed with additional functionalities with the capability of mimicking skin‐like perception and beyond. This review covers and highlights the latest advances of burgeoning multifunctional wearable electronics, primarily including versatile multimodal sensor systems, self‐healing material‐based devices, and self‐powered flexible sensors. To render the penetration of human‐interactive devices into global markets and households, economical manufacturing techniques are crucial to achieve large‐scale flexible systems with high‐throughput capability. The booming innovations in this research field will push the scientific community forward and benefit human beings in the near future.

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Synergistic Effects of Wrinkled Graphene and Plasmonics in Stretchable Hybrid Platform for Surface‐Enhanced Raman Spectroscopy

Cited by 33 publications

References 44 publications

Rationally Designed Graphene/Bilayer Silver/Cu Hybrid Structure with Improved Sensitivity and Stability for Highly Efficient SERS Sensing

Rationally Designed Graphene/Bilayer Silver/Cu Hybrid Structure with Improved Sensitivity and Stability for Highly Efficient SERS Sensing

High‐Performance SERS Substrate Based on Hierarchical 3D Cu Nanocrystals with Efficient Morphology Control

Multifunctional Skin‐Inspired Flexible Sensor Systems for Wearable Electronics

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