Colorimetric imaging of layer-by-layer molecular deposition on nanoplasmonic lycurgus cup array

Hu, Youde; Ameen, Abid; Hsiao, Austin; Liu, Gang Logan

doi:10.1016/j.snb.2017.07.039

Cited by 5 publications

(3 citation statements)

References 20 publications

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“…The detection technique of one-step rapid quantification of the SARS-CoV-2 pseudovirus was based on a label-free LSPR biosensor with extraordinary optical transmission (EOT) effect( Ebbesen et al, 1998 ; Hu et al, 2018 ; Jiang et al, 2018 ). EOT phenomenon is attributed to the strong field-enhanced plasma excitation in the vicinity of the nanoarrays induced by grating coupling of light at normal incidence illumination, which can simplify optical systems design and generate a high sensitivity to minute local refractive index changes( Ebbesen et al, 1998 ; Najiminaini et al, 2012 ).…”

Section: Resultsmentioning

confidence: 99%

One-step rapid quantification of SARS-CoV-2 virus particles via low-cost nanoplasmonic sensors in generic microplate reader and point-of-care device

Huang

Ding

Zhou

et al. 2021

Biosensors and Bioelectronics

200

169

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The spread of SARS-CoV-2 virus in the ongoing global pandemic has led to infections of millions of people and losses of many lives. The rapid, accurate and convenient SARS-CoV-2 virus detection is crucial for controlling and stopping the pandemic. Diagnosis of patients in the early stage infection are so far limited to viral nucleic acid or antigen detection in human nasopharyngeal swab or saliva samples. Here we developed a method for rapid and direct optical measurement of SARS-CoV-2 virus particles in one step nearly without any sample preparation using a spike protein specific nanoplasmonic resonance sensor. As low as 370 vp/mL were detected in one step within 15 min and the virus concentration can be quantified linearly in the range of 0 to 10 7 vp/mL. Measurements shown on both generic microplate reader and a handheld smartphone connected device suggest that our low-cost and rapid detection method may be adopted quickly under both regular clinical environment and resource-limited settings.

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Section: Resultsmentioning

confidence: 99%

One-step rapid quantification of SARS-CoV-2 virus particles via low-cost nanoplasmonic sensors in generic microplate reader and point-of-care device

Huang

Ding

Zhou

et al. 2021

Biosensors and Bioelectronics

200

169

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“…Beyond simple micro- and nanograting with homogeneous depths, nanopatterns having variable depths and dimensions within a single substrate zone may be capitalized in many applications requiring tunable optical, mechanical, and/or physicochemical characteristics, such as holograms, color filters, − microfluidic platforms, , biosensors, − photonic structures, , and electrochemical devices. − Typical fabrication methods involving simple lithography and/or normal NIL, however, cannot easily produce such structures without resorting to time-consuming and costly procedures. By controlling the mold–substrate alignment angle and inscribing stroke direction, DNI enables tailored nanopatterning with gradient depth profiles and multidimensional structures in a continuous and very practical fashion.…”

Section: Resultsmentioning

confidence: 99%

Tailored Nanopatterning by Controlled Continuous Nanoinscribing with Tunable Shape, Depth, and Dimension

Lee

et al. 2019

ACS Nano

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We present that the tailored nanopatterning with tunable shape, depth, and dimension for diverse application-specific designs can be realized by utilizing controlled dynamic nanoinscribing (DNI), which can generate bur-free plastic deformation on various flexible substrates via continuous mechanical inscription of a small sliced edge of a nanopatterned mold in a compact and vacuum-free system. Systematic controlling of prime DNI processing parameters including inscribing force, temperature, and substrate feed rate can determine the nanopattern depths and their specific profiles from rounded to angular shapes as a summation of the force-driven plastic deformation and heat-driven thermal deformation. More complex nanopatterns with gradient depths and/or multidimensional profiles can also be readily created by modulating the horizontal mold edge alignment and/or combining sequential DNI strokes, which otherwise demand laborious and costly procedures. Many practical user-specific applications may benefit from this study by tailor-making the desired nanopattern structures within desired areas, including precision machine and optics components, transparent electronics and photonics, flexible sensors, and reattachable and wearable devices. We demonstrate one vivid example in which the light diffusion direction of a light-emitting diode can be tuned by application of specifically designed DNI nanopatterns.

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“…[ 36 , 37 ] Another typical example is the Lycurgus Cup, which contains gold and silver nanoparticles. [ 38 , 39 , 40 ] It can display two colours when viewed in reflected and transmitted light. [ 41 , 42 ] Although the dichroism of the cup is well known, its underlying mechanism has not been actively explored for the development of optical devices.…”

Section: Introductionmentioning

confidence: 99%

Dichroic switching of core–shell plasmonic nanoparticles on reflective surfaces

Liang,

Li,

Bai

et al. 2023

Exploration

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Plasmonic metal nanostructures can simultaneously scatter and absorb light, with resonance wavelength and strength depending on their morphology and composition. This work demonstrates that unique dichroic effects and high‐contrast colour‐switching can be achieved by leveraging the resonant scattering and absorption of light by plasmonic nanostructures and the specular reflection of the resulting transmitted light. Using core/shell nanostructures comprising a metal core and a dielectric shell, we show that their spray coating on reflective substrates produces dichroic films that can display colour switching at different viewing angles. The high‐contrast colour switching, high flexibility in designing multicolour patterns, and convenience for large‐scale production promise their wide range of applications, including anticounterfeiting, mechanochromic sensing, colour display, and printing.

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Colorimetric imaging of layer-by-layer molecular deposition on nanoplasmonic lycurgus cup array

Cited by 5 publications

References 20 publications

One-step rapid quantification of SARS-CoV-2 virus particles via low-cost nanoplasmonic sensors in generic microplate reader and point-of-care device

One-step rapid quantification of SARS-CoV-2 virus particles via low-cost nanoplasmonic sensors in generic microplate reader and point-of-care device

Tailored Nanopatterning by Controlled Continuous Nanoinscribing with Tunable Shape, Depth, and Dimension

Dichroic switching of core–shell plasmonic nanoparticles on reflective surfaces

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