3D Aluminum Hybrid Plasmonic Nanostructures with Large Areas of Dense Hot Spots and Long‐Term Stability

Li, Ximei; Bi, Minghai; Cui, Lan; Zhou, Yuzhu; Du, Xi‐Wen; Qiao, Shi Zhang; Yang, Jing

doi:10.1002/adfm.201605703

Cited by 65 publications

(66 citation statements)

References 53 publications

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“…[132] Li et al developed a 3D aluminum hybrid nanostructure with a high density of hot spots across a large scale (≈1 cm 2 ), [133] and the protective alumina layer further provided long-term stability of plasmonic properties and SERS performance (≥6 months). In this review, we provide an overview of the current state of engineered plasmonic nanomaterials, and how they are integrated into SERS platforms for liquid biopsy analyses.…”

Section: Summary and Perspectivesmentioning

confidence: 99%

Engineering State‐of‐the‐Art Plasmonic Nanomaterials for SERS‐Based Clinical Liquid Biopsy Applications

et al. 2019

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Precision oncology, defined as the use of the molecular understanding of cancer to implement personalized patient treatment, is currently at the heart of revolutionizing oncology practice. Due to the need for repeated molecular tumor analyses in facilitating precision oncology, liquid biopsies, which involve the detection of noninvasive cancer biomarkers in circulation, may be a critical key. Yet, existing liquid biopsy analysis technologies are still undergoing an evolution to address the challenges of analyzing trace quantities of circulating tumor biomarkers reliably and cost effectively. Consequently, the recent emergence of cutting-edge plasmonic nanomaterials represents a paradigm shift in harnessing the unique merits of surface-enhanced Raman scattering (SERS) biosensing platforms for clinical liquid biopsy applications. Herein, an expansive review on the design/synthesis of a new generation of diverse plasmonic nanomaterials, and an updated evaluation of their demonstrated SERS-based uses in liquid biopsies, such as circulating tumor cells, tumor-derived extracellular vesicles, as well as circulating cancer proteins, and tumor nucleic acids is presented. Existing challenges impeding the clinical translation of plasmonic nanomaterials for SERS-based liquid biopsy applications are also identified, and outlooks and insights into advancing this rapidly growing field for practical patient use are provided.

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Section: Summary and Perspectivesmentioning

confidence: 99%

Engineering State‐of‐the‐Art Plasmonic Nanomaterials for SERS‐Based Clinical Liquid Biopsy Applications

et al. 2019

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“…LAL has been recognized as a powerful technique for preparing various nanomaterials . In this study, the underlying chemical processes for the formation of CoO/LDHs composite have not been well understood.…”

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Strongly Coupled CoO Nanoclusters/CoFe LDHs Hybrid as a Synergistic Catalyst for Electrochemical Water Oxidation

Zuo-ning

Chen

et al. 2018

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Exploiting high-performance, robust, and cost-effective electrocatalysts for the oxygen evolution reaction (OER) is crucial for electrochemical energy storage and conversion technologies. Engineering the interfacial structure of hybrid catalysts often induces synergistically enhanced electrocatalytic performance. Herein, a new strongly coupled heterogeneous catalyst with proper interfacial structures, i.e., CoO nanoclusters decorated on CoFe layered double hydroxides (LDHs) nanosheets, is prepared via a simple one-step pulsed laser ablation in liquid method. Thorough spectroscopic characterizations reveal that strong chemical couplings at the hybrid interface trigger charge transfer from Co in the oxide to Fe in the LDHs through the interfacial FeOCo bond, leading to considerable amounts of high oxidation state Co sites present in the hybrid. Interestingly, the CoO/CoFe LDHs exhibit pronounced synergistic effects in electrocatalytic water oxidation, with substantially enhanced intrinsic catalytic activity and stability relative to both components. The hybrid catalyst achieves remarkably low OER overpotential and Tafel slope in alkaline medium, outperforming that of Ru/C and manifesting itself among the most active Co-based OER catalysts.

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“…Especially, the extinction bands exhibit a blueshift with an increase of silver content despite the slightly increasing of the size of hybrid assemblies . Besides, the plasmonic resonance of AuMAu and AgMAu get enhanced compared with MoS 2 /AuNP indicating strong plasma resonances in the 3D hybrid nanostructure . In order to better understand the origin of the optical spectra of the AuMAu and AgMAu, and assess the electric field enhancement in the nanogap region produced by the monolayer MoS 2 among the hybrid assemblies, the simulations according to the FDTD method were performed.…”

Section: Resultsmentioning

confidence: 99%

3D Hybrid Plasmonic Nanostructures with Dense Hot Spots Using Monolayer MoS₂ as Sub‐Nanometer Spacer

Jiang

Huo

et al. 2018

Adv Materials Inter

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some problems for the use of graphene. First, it has been demonstrated that the intensity of the EF generally increase as the gap decreases from 10 nm to 6.2 Å but fall off dramatically when the gap further decrease from 6.2 Å for the occurrence of quantum mechanical effects based on the results of the simulation and experiments. [16] The thickness of monolayer graphene is just 3.4 Å, which is so thin that the quantum mechanical electron tunneling emerge in a NP/G/NP or NP/G/ metal film structure. For such nanostructures, the electron tunneling can reduce the accumulation of opposite charges on the both sides of gap and further the EF in the "hot spots" would decrease. Second, the graphene film would tear and suspend inevitably in the transferring process and cannot be covered tightly on the top of the nanostructure with many sharp irregular shapes. [17] To realize the better plasmonic couplings, a kind of new spacer with superior optical property and stability should be introduced. Molybdenum disulfide (MoS 2 ), a semiconductor crystal, has a hexagonal crystal structure with the Mo atom in a trigonal biprism coordination sandwiched between two S atom layers. The MoS 2 films have drawn a lot of attention for applications in energy conversion, photocatalysis, and biochemical sensing for its low cost, good chemical performance, and high stability. [18][19][20][21] Consequently, many researches have reported MoS 2 combined with plasmonic structures and showed excellent photoelectrical properties recently. [22][23][24] In this work, we proposed a 3D hybrid structure using mono layer MoS 2 as spacer between adjacent metal NP. The direct growth of MoS 2 films on AuNP was first realized and the monolayer MoS 2 /AuNP was further obtained after the simple ultrasonic treatment. The AuNP and AgNP were used separately as the third metal nanostructure through the metal films sputtering and annealing process on the surface of the MoS 2 /AuNP. Then, the AuNP/MoS 2 /AuNP (AuMAu) and AgNP/MoS 2 /AuNP (AgMAu) hybrid assemblies were all fabricated and investigated, respectively. Although the hybrid structure seems to have some structural similarities with some works using graphene as spacer, there are several differences. First, the thickness of monolayer MoS 2 is around 6.5 Å close to the optimum gap size (6.2 Å), which is supposed to obtain the considerable enhancement of the EF. The monolayer MoS 2 can act as an insulating sub-nanometer spacer between two metal NP layers for its high vertical resistance and gap thickness to effectively prevent the emergence of the quantum Here, 3D hybrid plasmonic nanostructures using monolayer MoS 2 as subnanometer spacer with high density hot spots are fabricated. For the 3D hybrid assemblies, the hot spots exist not only on the 0.65 nm thick MoS 2 gap regions between large and small nanoparticles (NP) but also between small and small NP. The high-density hot spots induce prominently enhanced optical absorption, huge surface enhanced Raman scattering effect, excellent reproducibility, and ultr...

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3D Aluminum Hybrid Plasmonic Nanostructures with Large Areas of Dense Hot Spots and Long‐Term Stability

Cited by 65 publications

References 53 publications

Engineering State‐of‐the‐Art Plasmonic Nanomaterials for SERS‐Based Clinical Liquid Biopsy Applications

Engineering State‐of‐the‐Art Plasmonic Nanomaterials for SERS‐Based Clinical Liquid Biopsy Applications

Strongly Coupled CoO Nanoclusters/CoFe LDHs Hybrid as a Synergistic Catalyst for Electrochemical Water Oxidation

3D Hybrid Plasmonic Nanostructures with Dense Hot Spots Using Monolayer MoS₂ as Sub‐Nanometer Spacer

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3D Aluminum Hybrid Plasmonic Nanostructures with Large Areas of Dense Hot Spots and Long‐Term Stability

Cited by 65 publications

References 53 publications

Engineering State‐of‐the‐Art Plasmonic Nanomaterials for SERS‐Based Clinical Liquid Biopsy Applications

Engineering State‐of‐the‐Art Plasmonic Nanomaterials for SERS‐Based Clinical Liquid Biopsy Applications

Strongly Coupled CoO Nanoclusters/CoFe LDHs Hybrid as a Synergistic Catalyst for Electrochemical Water Oxidation

3D Hybrid Plasmonic Nanostructures with Dense Hot Spots Using Monolayer MoS2 as Sub‐Nanometer Spacer

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3D Hybrid Plasmonic Nanostructures with Dense Hot Spots Using Monolayer MoS₂ as Sub‐Nanometer Spacer