Localized Surface Plasmon Resonance of Silver Nanotriangles Synthesized by a Versatile Solution Reaction

Wu, Chunfang; Zhou, Xue; Wang, Jie

doi:10.1515/nano.11671_2015.56

Cited by 3 publications

(5 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In particular, AuNP ranging in diameter from 5 to 40 nm has been widely used to enhance the response of SPR sensors [ 35 ]. Among all metal nanoparticles, gold and silver nanoparticles are particularly interesting because they have the strongest plasmonic interaction with light [ 36 ]. The signal enhancement by employing AuNP can be caused by different factors such as surface mass increasement due to AuNP and more molecules being attached to the AuNP than the planar gold surface; refractive index change by the particles; or electromagnetic field coupling between SPR and LSPR [ 37 ].…”

Section: Resultsmentioning

confidence: 99%

Selective Amplification of Plasmonic Sensor Signal for Cortisol Detection Using Gold Nanoparticles

et al. 2022

View full text Add to dashboard Cite

Herein, gold nanoparticles (AuNP)-modified cortisol-imprinted (AuNP-MIP) plasmonic sensor was developed for signal amplification and real-time cortisol determination in both aqueous and complex solutions. Firstly, the sensor surfaces were modified with 3-(trimethoxylyl)propyl methacrylate and then pre-complex was prepared using the functional monomer N-methacryloyl-L-histidine methyl ester. The monomer solution was made ready for polymerization by adding 2-hydroxyethyl methacrylate to ethylene glycol dimethacrylate. In order to confirm the signal enhancing effect of AuNP, only cortisol-imprinted (MIP) plasmonic sensor was prepared without AuNP. To determine the selectivity efficiency of the imprinting process, the non-imprinted (AuNP-NIP) plasmonic sensor was also prepared without cortisol. The characterization studies of the sensors were performed with atomic force microscopy and contact angle measurements. The kinetic analysis of the AuNP-MIP plasmonic sensor exhibited a high correlation coefficient (R2 = 0.97) for a wide range (0.01–100 ppb) with a low detection limit (0.0087 ppb) for cortisol detection. Moreover, the high imprinting efficiency (k′ = 9.67) of the AuNP-MIP plasmonic sensor was determined by comparison with the AuNP-NIP plasmonic sensor. All kinetic results were validated and confirmed by HPLC.

show abstract

Section: Resultsmentioning

confidence: 99%

Selective Amplification of Plasmonic Sensor Signal for Cortisol Detection Using Gold Nanoparticles

et al. 2022

View full text Add to dashboard Cite

show abstract

“…It is reported that silver nanotriangle shows three absorption peaks corresponding to three different modes of plasmon oscillation such as in-plane dipole resonance, in-plane quadrupole plasmon resonance and out-of-plane quadrupole resonance [40]. The position of the band around 560 nm and strong band around 420 nm, respectively, due to in-plane dipole resonance and in-plane quadrupole plasmon resonance, are not fixed and these peaks get red-shifted with the increase in the edge length of the nanotriangle [41][42][43]. However, there is a fixed band at around 350 nm, which does not change with the change in the edge length.…”

Section: Uv/vis Spectroscopy Analysismentioning

confidence: 99%

Effects of saponin capped triangular silver nanocrystals on the germination of Pisum sativum , Cicer arietinum , Vigna radiata seeds & their subsequent growth study

Debnath

Sarkar²,

Das

2019

IET nanobiotechnol.

View full text Add to dashboard Cite

In this study, saponin capped triangular silver nanocrystals have been synthesised using fenugreek seed extract, where the extract acts both as a reducing and capping agent. X-ray diffraction study confirms the purity and crystalline nature of the prepared nanocrystals and transmission electron microscopic study shows the triangular morphology with the average edge length of 72 nm, along with the atomic force microscopy study for the height or the width of the triangular nanocrystals. These nanocrystals have been investigated against a few pulses (seeds) such as Pisum sativum, Cicer arietinum and Vigna radiata for their effect on the germination as well as growth of root and shoot. Considering different concentration of silver nanocrystals solution, it has been found that 25 × 10 −4 and 80 × 10 −4 μg/ml are the minimum and maximum concentrations of silver nanocrystals, within this range, germination and subsequent growth of root and shoot are effective. The result shows significant positive influence on the growth of root and shoot of all seeds in comparison to those of unexposed control germination. Therefore, the result of this experiment has confirmed that the use of saponin capped silver nanocrystals enhances the germination and growth of plants.

show abstract

“…As matter of fact, the scattering cross-section of silver is greater than that of the other kinds of metals. Compared to other shapes, the anisotropic morphology of nanotriangles offers multiple LSPR bands with their decreased symmetry [158]. Triangular nanoplates offer optical extinction peaks resulting from in-plane and out-of-plane modes, which can be conveniently tuned by controlling their aspect ratio (the ratio of edge length to thickness) [158,159].…”

Section: Investigation Into Contrast Enhancement Using Silica-coated Silver Nanoplatesmentioning

confidence: 99%

“…Compared to other shapes, the anisotropic morphology of nanotriangles offers multiple LSPR bands with their decreased symmetry [158]. Triangular nanoplates offer optical extinction peaks resulting from in-plane and out-of-plane modes, which can be conveniently tuned by controlling their aspect ratio (the ratio of edge length to thickness) [158,159]. Since most of the signals are generated from tip area, nanotriangles provides excellent enhancement of the local field and the spatial resolution.…”

Section: Investigation Into Contrast Enhancement Using Silica-coated Silver Nanoplatesmentioning

confidence: 99%

“…Since most of the signals are generated from tip area, nanotriangles provides excellent enhancement of the local field and the spatial resolution. The triangular-shaped nanoplates have been synthesized by various research groups with tight control over sizes and homogeneities that are suitable for bio-imaging applications [158,160].…”

Section: Investigation Into Contrast Enhancement Using Silica-coated Silver Nanoplatesmentioning

confidence: 99%

See 1 more Smart Citation

Investigation into swept source based optical coherence tomography for bio-imaging

Meleppat¹

View full text Add to dashboard Cite

Optical imaging at both the macroscopic and microscopic levels is used intensively these days by clinicians for diagnosis and treatment. New advances in optics, data acquisition, and signal processing enabled the development of novel optical imaging technologies with enhanced imaging capabilities for targeted applications. Further, optical imaging technologies are more affordable than conventional radiation based technologies and provide both structural and functional information with enhanced resolution. Among different optical imaging modalities, optical coherence tomography (OCT) has gained a special attraction since it allows a non-invasive and in-vivo subsurface imaging of the biological specimen at high resolution and relatively better penetration depth. Fourierdomain OCT (FDOCT) configurations are highly attractive for many diagnostic imaging applications due to their potential for high speed imaging with high sensitivity. Chapter 6: Real-time in-situ investigation of bacterial biofilms using optical coherence tomographyThis chapter describes the use of optical coherence tomography for high resolution in-situ imaging of the development of bacterial biofilms. Chapter begins with the in-situ investigation of biofilms of Pseudomonas Aeruginosa (PA-1) using cross-sectional images. This will be followed by the theoretical and experimental demonstration of a novel methodology that allows simultaneous measurement of group refractive index and the physical thickness biofilms. The experimental investigations are further extended towards imaging microcolonies of Klebsiella Pneumonia (KP-1) using swept source based optical coherence microscopy (SSOCM). The development of microcolonies and the transient processes in response to the antibacterial treatment were investigated using enface images. The real-time in-situ quantification of optical density and planar density of biofilms was performed using novel methodologies based on OCM technique and compared with the measurements obtained via standard methods.

show abstract

Localized Surface Plasmon Resonance of Silver Nanotriangles Synthesized by a Versatile Solution Reaction

Cited by 3 publications

References 26 publications

Selective Amplification of Plasmonic Sensor Signal for Cortisol Detection Using Gold Nanoparticles

Selective Amplification of Plasmonic Sensor Signal for Cortisol Detection Using Gold Nanoparticles

Effects of saponin capped triangular silver nanocrystals on the germination of Pisum sativum , Cicer arietinum , Vigna radiata seeds & their subsequent growth study

Investigation into swept source based optical coherence tomography for bio-imaging

Contact Info

Product

Resources

About