Light-Induced Coalescence of Plasmonic Dimers and Clusters

Salmon, Andrew R.; Kleemann, Marie-Elena; Huang, Junyang; Deacon, William; Carnegie, Cloudy; Kamp, Marlous; Nijs, Bart de; Demetriadou, Angela; Baumberg, Jeremy J.

doi:10.1021/acsnano.0c01213

Cited by 27 publications

(32 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Consequently, a strong and characteristic single molecule SERS spectrum 28 is obtained for Cy5 using the Au DONAs. In contrast, DONAs containing a pure DNA bridge do not display any fingerprint spectra (see Fig.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

A versatile DNA origami based plasmonic nanoantenna for label-free single-molecule SERS

Tapio

Mostafa

Kanehira

et al. 2020

Preprint

View full text Add to dashboard Cite

DNA origami technology allows for the precise nanoscale assembly of chemical entities that give rise to new functional materials. We have created a versatile DNA Origami Nanofork Antenna (DONA) by assembling Au or Ag nanoparticle dimers with 1.17 ± 0.67 nm gap size, enabling signal enhancements in surface-enhanced Raman scattering (SERS) of up to 1011. This allows for single-molecule SERS measurements, which can even be performed with larger gap sizes to accommodate differently sized molecules, and at various excitation wavelengths. A general scheme is presented to place single analyte molecules into the SERS hot spots using the DNA origami structure exploiting covalent and non-covalent coupling schemes. By using Au and Ag dimers, single-molecule SERS measurements of three dyes and cytochrome c and horseradish peroxidase proteins are demonstrated even under non-resonant excitation conditions, thus providing long photostability during time-series measurement, and enabling unprecedented optical monitoring of single molecules and DNA origami based nanomachines.

show abstract

Section: Resultsmentioning

confidence: 99%

“…S18). This effect could be due to a soldering of the nanoparticles during the constant laser excitation 28 . On a shorter time scale (as displayed in Fig.4), clear fluctuations of the signals are observed, which correspond to SERS blinking.…”

Section: Resultsmentioning

confidence: 99%

A versatile DNA origami based plasmonic nanoantenna for label-free single-molecule SERS

Tapio

Mostafa

Kanehira

et al. 2020

Preprint

View full text Add to dashboard Cite

show abstract

“…S18). This effect could be due to a soldering of the nanoparticles during the constant laser excitation (43) (Fig. 5).…”

Section: Resultsmentioning

confidence: 99%

A versatile DNA origami based plasmonic nanoantenna for label-free single-molecule SERS

Tapio

Mostafa

Kanehira

et al. 2020

Preprint

View full text Add to dashboard Cite

DNA origami technology allows for the precise nanoscale assembly of chemical entities that give rise to new functional materials. We have created a versatile DNA Origami Nanofork Antenna (DONA) by assembling Au or Ag nanoparticle dimers with different gap sizes down to 1.17 nm, enabling signal enhancements in surface-enhanced Raman scattering (SERS) of up to 1011. This allows for single-molecule SERS measurements, which can even be performed with larger gap sizes to accommodate differently sized molecules, and at various excitation wavelengths. A general scheme is presented to place single analyte molecules into the SERS hot spots using the DNA origami structure exploiting covalent and non-covalent coupling schemes. By using Au and Ag dimers, single-molecule SERS measurements of three dyes and cytochrome c and horseradish peroxidase proteins are demonstrated even under non-resonant excitation conditions, thus providing long photostability during time-series measurement, and enabling unprecedented optical monitoring of single molecules.

show abstract

“…Since its first appearance, many research groups have systematically studied this powerful method and completed the construction and modification process [ 28 , 29 ]. For example, Baumberg and Bartlett pioneered the fabrication of two-dimensional sphere segment (SSV) metallic arrays using a template and electrodeposition, and intensely studied their applications in electrochemistry, optical waveguides, and surface-enhanced Raman scattering [ 30 , 31 , 32 ]. Zhao and colleagues [ 33 ] constructed a Ta/Ni bimetallic bowl-shaped array electrode for the amperometric detection of uric acid.…”

Section: Introductionmentioning

confidence: 99%

H2O2/Glucose Sensor Based on a Pyrroloquinoline Skeleton-Containing Molecule Modified Gold Cavity Array Electrode

Wang

Zhao

et al. 2022

Nanomaterials

View full text Add to dashboard Cite

H2O2-related metabolites are essential indicators in clinical diagnosis because the accumulation of such reactive oxygen species could cause the risk of cardiovascular disease. Herein, we reported an electrochemical sensor to determine H2O2 and glucose. The pyrroloquinoline skeleton containing molecules (PQT) were used as the electrocatalyst and the gold cavity array (GCA) electrodes as the supporting electrode. The GCA electrode was fabricated by electrodeposition using high-ordered two-dimensional polystyrene spheres as the template. The strong absorbability of iodide ions (I−) displaced adventitious materials from the metal surface and the I− monolayer was subsequently removed by electrochemical oxidation to get a clean electrode surface. PQT molecules were firmly immobilized on the GCA electrode and performed an excellent electrocatalytic effect on H2O2/glucose detection, manifested by a small overpotential and a significantly increased reduction current. A good linear correlation was observed over a wide range of 0.2 μmol/L–1.0 mmol/L with the limit of detection of 0.05 μmol/L. Moreover, the sensor can realize sensitive, accurate, and the highly selective detection of actual samples, proving its application prospect in clinical diagnosis.

show abstract

Light-Induced Coalescence of Plasmonic Dimers and Clusters

Cited by 27 publications

References 29 publications

A versatile DNA origami based plasmonic nanoantenna for label-free single-molecule SERS

A versatile DNA origami based plasmonic nanoantenna for label-free single-molecule SERS

A versatile DNA origami based plasmonic nanoantenna for label-free single-molecule SERS

H2O2/Glucose Sensor Based on a Pyrroloquinoline Skeleton-Containing Molecule Modified Gold Cavity Array Electrode

Contact Info

Product

Resources

About