Multi-functional plasmonic fabrics: A flexible SERS substrate and anti-counterfeiting security labels with tunable encoding information

Liu, Sijia; Tian, Xiaoran; Guo, Jiaqi; Kong, Xianming; Ling-zi, XU; Yu, Qian; Wang, Alan X.

doi:10.1016/j.apsusc.2021.150861

Cited by 27 publications

(10 citation statements)

References 35 publications

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“…The kinetics of the formation of single-component clusters on surfaces and their physical properties has extensively been investigated, both by theory and experiments. ,− Besides such single-component clusters, presently alloys or multicomponent-supported clusters receive increasing attention. Prominent supported cluster synthesis methods include chemical methods and vacuum deposition. − Hence, already much effort has been undertaken to synthesize such multicomponent and metallic clusters using different methods such as pyrolysis, sol–gel synthesis, templating, aggregation sources, , and sputter deposition. ,, The nucleation and growth of silver and copper clusters during magnetron sputtering was observed very successfully by X-ray scattering. , Applications of supported clusters range from heterogeneous catalysis and photocatalysis to information technology and solar cells as well as anticounterfeiting. − Here, nanoscale heterostructures and alloying allow for the facile tuning of chemical and optoelectronic properties. , Sputter deposition allows for alloying and high cluster density layers, enabling, for example, an organic shell-free cluster incorporated in layer-by-layer printing processes …”

Section: Introductionmentioning

confidence: 99%

In Situ Monitoring of Scale Effects on Phase Selection and Plasmonic Shifts during the Growth of AgCu Alloy Nanostructures for Anticounterfeiting Applications

Schwartzkopf

Rothkirch

Carstens

et al. 2022

ACS Appl. Nano Mater.

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Tailoring of plasmon resonances is essential for applications in anticounterfeiting. This is readily achieved by tuning the composition of alloyed metal clusters; in the simplest case, binary alloys are used. Yet, one challenge is the correlation of cluster morphology and composition with the changing optoelectronic properties. Hitherto, the early stages of metal alloy nanocluster formation in immiscible binary systems such as silver and copper have been accessible by molecular dynamics (MD) simulations and transmission electron microscopy (TEM). Here, we investigate in real time the formation of supported silver, copper, and silver–copper-alloy nanoclusters during sputter deposition on poly(methyl methacrylate) by combining in situ surface-sensitive X-ray scattering with optical spectroscopy. While following the transient growth morphologies, we quantify the early stages of phase separation at the nanoscale, follow the shifts of surface plasmon resonances, and quantify the growth kinetics of the nanogranular layers at different thresholds. We are able to extract the influence of scaling effects on the nucleation and phase selection. The internal structure of the alloy cluster shows a copper-rich core/silver-rich shell structure because the copper core yields a lower mobility and higher crystallization tendency than the silver fraction. We compare our results to MD simulation and TEM data. This demonstrates a route to tailor accurately the plasmon resonances of nanosized, polymer-supported clusters which is a crucial prerequisite for anticounterfeiting.

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Section: Introductionmentioning

confidence: 99%

In Situ Monitoring of Scale Effects on Phase Selection and Plasmonic Shifts during the Growth of AgCu Alloy Nanostructures for Anticounterfeiting Applications

Schwartzkopf

Rothkirch

Carstens

et al. 2022

ACS Appl. Nano Mater.

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“…In addition to using a single type of probe molecule for SERS labels, multiple Raman reporters can be combined, working together to form even complex SERS spectra. [94][95][96] Overlapping various simple spectra creates a more complex spectrum, which can increase a label's intricacy dramatically. For example, Li et al combined multiple SERS probes to produce an encoded magnetic composite of microspheres for anti-counterfeiting applications (Figure 6).…”

Section: Spectra Multiplexingmentioning

confidence: 99%

Recent Progress in SERS‐Based Anti‐counterfeit Labels

Huo

Yang

Wilson

et al. 2022

Adv Materials Inter

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Anti‐counterfeit labels protect many commercial goods, drugs, and currencies from counterfeiting activities. Recently, the designs of anti‐counterfeit labels have emerged utilizing surface‐enhanced Raman scattering (SERS) as a powerful technique, in which SERS‐active materials provide strong Raman signals of probe molecules. These signals are unique and, so far, have rarely been used in practical anti‐counterfeit labels applications. In this review, the general methodology of using Raman and SERS in designing anti‐counterfeit labels is first introduced. Then, two types of secret information in SERS labels, spectroscopic information and graphical information, are detailed and discussed with a focus on how the molecular information is encoded with SERS labels. Later, several advanced SERS labels are presented which combine existing security features such as barcode, quick response code, fluorescence, and unclonable features. Finally, the challenges in building usable SERS anti‐counterfeit labels are discussed and possible research directions are described.

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“…The advantage of SERS results from the phenomenon that the Raman signal could be significantly enhanced by several orders of magnitude when the molecules are located near or on the surface of the plasmonic substrate [11][12][13][14]. The noninvasive, sensitive, and label-free features of SERS enable them to be widely applied in chemical analysis, environmental protection, biological sensing, biochemical analysis, and food safety [15][16][17][18]. Recent times have also witnessed the innovation of the SERS-based POC sensors as the development of portable Raman spectrometers.…”

Section: Introductionmentioning

confidence: 99%

Ultra-Sensitive, Rapid and On-Site Sensing Harmful Ingredients Used in Aquaculture with Magnetic Fluid SERS

et al. 2022

Self Cite

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The integration of surface-enhanced Raman scattering (SERS) spectroscopy with magnetic fluid provides significant utility in point-of-care (POC) testing applications. Bifunctional magnetic–plasmonic composites have been widely employed as SERS substrates. In this study, a simple and cost-effective approach was developed to synthesize magnetic–plasmonic SERS substrates by decorating silver nanoparticles onto magnetic Fe3O4 nanoparticles (AgMNPs), which function both as SERS-active substrates and magnetic fluid particles. The strong magnetic responsivity from AgMNPs can isolate, concentrate, and detect target analytes from the irregular surface of fish skin rapidly. We fabricate a microfluid chip with three sample reservoirs that confine AgMNPs into ever smaller volumes under an applied magnetic field, which enhances the SERS signal and improves the detection limit by two orders of magnitude. The magnetic fluid POC sensor successfully detected malachite green from fish with excellent selectivity and high sensitivity down to the picomolar level. This work achieves a label-free, non-destructive optical sensing approach with promising potential for the detection of various harmful ingredients in food or the environment.

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Multi-functional plasmonic fabrics: A flexible SERS substrate and anti-counterfeiting security labels with tunable encoding information

Cited by 27 publications

References 35 publications

In Situ Monitoring of Scale Effects on Phase Selection and Plasmonic Shifts during the Growth of AgCu Alloy Nanostructures for Anticounterfeiting Applications

In Situ Monitoring of Scale Effects on Phase Selection and Plasmonic Shifts during the Growth of AgCu Alloy Nanostructures for Anticounterfeiting Applications

Recent Progress in SERS‐Based Anti‐counterfeit Labels

Ultra-Sensitive, Rapid and On-Site Sensing Harmful Ingredients Used in Aquaculture with Magnetic Fluid SERS

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