Effect of pHs on the Structure Evolution of Platinum Nanoclusters and Their Surface Plasmon Resonance Properties

2021 ◽  
Vol 21 (9) ◽  
pp. 4700-4704
Author(s):  
M. Habib Ullah ◽  
Haram Moon ◽  
Chang-Sik Ha
Keyword(s):  
Surface Plasmon Resonance ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Pt Nanoparticles ◽  
Structure Evolution ◽  
Visible Absorption ◽  
Synthetic Process ◽  
3 Dimensional ◽  
Average Size ◽  
Platinum Nanoclusters

Multi-structured platinum nanoclusters have been prepared through a one-step aqueous synthetic process by controlling pHs. The included structures are closely packed 3-dimensional (3D) dendrites, loosely packed 3D dendrites, short-order dendritic chains, long-order dendritic chains, flatten nanoclusters and monodisperse nanoparticles. The high resolution transmission electron microscopy images (HRTEM) display that the nanoclusters with a variety of structures are filled with grains of average size ~2.0 nm. The images of the nanoclusters demonstrated that Pt nanoparticles were not fused to each other, but their aggregations were separated by cetyltrimethylammonium bromide (CTAB). The as-prepared Pt nanomaterials were studied by UV-visible absorption spectroscopy to identify their surface plasmon resonance (SPR) activities. The structure dependent SPR signals have been observed from 200 nm–800 nm.

Au and NiO nanoparticles dispersed inside porous SiO2 sol-gel film: correlation between localized surface plasmon resonance and structure upon thermal annealing

2012 ◽  
Vol 1449 ◽  
Author(s):  
Enrico Della Gaspera ◽  
Giovanni Mattei ◽  
Alessandro Martucci
Keyword(s):  
Surface Plasmon Resonance ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Thermal Evolution ◽  
Sol Gel ◽  
Localized Surface Plasmon ◽  
Surface Plasmon Resonance Peak ◽  
Nio Nanoparticles ◽  
Visible Absorption ◽  
Plasmon Resonance Peak

ABSTRACTThe favorable lattice matching between Au and NiO crystals made possible the growth of unique cookie-like nanoparticles (25 nm mean diameter) inside a porous SiO2 film after annealing at 700 °C. The unusual aggregates result from the coupling of well distinguishable Au and NiO hemispheres, which respectively face each other through the (100) and (200) lattice planes. The thermal evolution of the Au and NiO nanoparticles structure has been studied by high resolution transmission electron microscopy and UV-visible absorption spectroscopy and correlated with the evolution of the Au surface plasmon resonance peak.

scholarly journals Surface plasmon resonance imaging detection of silver nanoparticle-tagged immunoglobulin

2011 ◽  
Vol 8 (61) ◽  
pp. 1204-1211 ◽  
Author(s):  
Sharmistha Paul ◽  
Deepen Paul ◽  
George R. Fern ◽  
Asim K. Ray
Keyword(s):  
Surface Plasmon Resonance ◽  
Surface Plasmon ◽  
Silver Nanoparticle ◽  
Plasmon Resonance ◽  
Resonance Wavelength ◽  
Detection Sensitivity ◽  
Visible Absorption ◽  
Transmission Electron ◽  
Imaging Instrument ◽  
Set Up

The detection sensitivity of silver nanoparticle (AgNP)-tagged goat immunoglobulin G (gIgG) microarrays was investigated by studying surface plasmon resonance (SPR) images captured in the visible wavelength range with the help of a Kretchmann-configured optical coupling set-up. The functionalization of anti-gIgG molecules on the AgNP surface was studied using transmission electron microscopy, photon correlation measurements and UV–visible absorption spectroscopy. A value of 1.3 × 10 7 M −1 was obtained for the antibody–antigen binding constant by monitoring the binding events at a particular resonance wavelength. The detection limit of this SPR imaging instrument is 6.66 nM of gIgG achieved through signal enhancement by a factor of larger than 4 owing to nanoparticle tagging with the antibody.

scholarly journals Synthesis Of Silver Nanoparticles Using Beluntas Leaf (Pluchea Indica L.) Extract

2019 ◽  
Vol 12 (1) ◽  
pp. 7
Author(s):  
Fatimah Fatimah ◽  
Abdul Wahid Wahab ◽  
Abdul Karim
Keyword(s):  
Silver Nanoparticles ◽  
Absorption Spectrum ◽  
Surface Plasmon Resonance ◽  
Reaction Time ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Leaf Extract ◽  
Agno3 Solution ◽  
Absorbance Peak ◽  
Average Size

Synthesis of silver nanoparticles was carried out using environmentally Beluntas (Pluchea Indica L.) leaf extract to minimize the use of harmful chemicals. Synthesis was carried out with the ratio of AgNO3 solution and the beluntas leaf extract 90 mL : 1 mL. The process of forming silver nanoparticles was studied and monitored by observing the absorption spectrum using UV-Vis spectrophotometer. The observations showed the silver nanoparticles that was formed had SPR (Surface Plasmon Resonance) absorbance peak values at the wavelength of about 445,5 nm with an absorbance value of 3,437. The absorbance value increased with the increasing reaction time from 1 hour to 168 hours. From the result of testing using PSA, the average size of silver nanoparticles was 109.1 nm which is dispersed between 1,8 nm – 127,3 nm.

Comparison of sensitivity of the refractometric methods of frustrated total internal reflection and surface plasmon resonance

2020 ◽  
pp. 44-49
Author(s):  
I. N. Pavlov
Keyword(s):  
Surface Plasmon Resonance ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Total Internal Reflection ◽  
Resonance Method ◽  
Internal Reflection ◽  
Optical Methods ◽  
Thin Boundary Layer ◽  
Experimental Conditions ◽  
Frustrated Total Internal Reflection

Two optical methods, namely surface plasmon resonance imaging and frustrated total internal reflection, are described in the paper in terms of comparing their sensitivity to change of refractive index of a thin boundary layer of an investigated medium. It is shown that, despite the fact that the theoretically calculated sensitivity is higher for the frustrated total internal reflection method, and the fact that usually in practice the surface plasmon resonance method, on the contrary, is considered more sensitive, under the same experimental conditions both methods show a similar result.

Surface Plasmon Resonance Based Sensitive Immunosensor for Benzaldehyde Detection

2010 ◽  
Vol 130 (7) ◽  
pp. 269-274 ◽  
Author(s):  
Takeshi Onodera ◽  
Takuzo Shimizu ◽  
Norio Miura ◽  
Kiyoshi Matsumoto ◽  
Kiyoshi Toko
Keyword(s):  
Surface Plasmon Resonance ◽  
Surface Plasmon ◽  
Plasmon Resonance
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