Optoelectronic method for analysis of biomolecular interaction dynamics

Nepomnyashchaya, Elina; Velichko, Elena; Aksenov, E. T.; Bogomaz, Tatyana

doi:10.1088/1742-6596/541/1/012039

Cited by 4 publications

(5 citation statements)

References 6 publications

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“…According to our estimates, such a weak heterogeneity did not exert an appreciable influence on the formation of clusters in ferrofluids. Laser correlation spectroscopy is an efficient tool for measuring sizes and investigation of cluster formation in solutions [8,9]. The technique relies on measurements of the autocorrelation function of the light scatted by a sample.…”

Section: Experimental Methodsmentioning

confidence: 99%

Investigation of magneto-optical properties of ferrofluids by laser light scattering techniques

Nepomnyashchaya

Prokofiev

Velichko

et al. 2017

Journal of Magnetism and Magnetic Materials

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Investigation of magnetooptical characteristics of ferrofluids is an important task aimed at the development of novel optoelectronic systems. This article reports on the results obtained in the experimental studies of the factors that affect the intensity and spatial distribution of the laser radiation scattered by magnetic particles and their agglomerates in a magnetic field. Laser correlation spectroscopy and direct measurements of laser radiation scattering for studies of the interactions and magnetooptical properties of magnetic particles in solutions were employed. The objects were samples of nanodispersed magnetite (Fe 3 O 4 ) suspended in kerosene and in water. Our studies revealed some new behavior of magnetic particles in external magnetic and light fields, which make ferrofluids promising candidates for optical devices.

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Section: Experimental Methodsmentioning

confidence: 99%

Investigation of magneto-optical properties of ferrofluids by laser light scattering techniques

Nepomnyashchaya

Prokofiev

Velichko

et al. 2017

Journal of Magnetism and Magnetic Materials

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“…It is known that laser correlation spectroscopy is an effective tool for studying clusters in solutions containing nanoparticles; in particular, it has been successfully used to characterize ferrofluids placed in a magnetic field [12][13][14]. This method is based on the calculation of the autocorrelation function of the light scattered by the sample, from which, with a known viscosity of the carrier liquid, data on the sizes of particles or their agglomerates d are extracted (a more detailed description of this technique can be found in [14] and references therein).…”

Section: Laser Correlation Spectroscopymentioning

confidence: 99%

Agglomeration of magnetite nanoparticles with citrate shell in an aqueous magnetic fluid

Pleshakov¹,

Ryzhov²,

Marchenko³

et al. 2023

Nanosystems: Phys. Chem. Math.

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In this work, the aggregation of nanoparticles in an aqueous colloidal solution of magnetite, stabilized by creating a citrate shell on the particle surface is studied. Electron microscopy and laser correlation spectroscopy were used as experimental methods. Optical measurements were carried out both at zero external magnetic field and in the fields differently oriented relative to the probing laser beam. It is shown that the samples tend to form large aggregates even without the application of the field, and in the case of its presence the behavior of these structures has features that distinguish them from other magnetic fluids.

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“…There has recently been increased scientific and applied interest in surface plasmons: collective vibrations of metal conduction electrons excited by an electromagnetic wave of light radiation at the interface with a dielectric [1][2][3][4][5]. The excitement of surface plasmon resonance is accompanied by the increased luminescence of the medium, absorption of light radiation, Raman scattering, etc.…”

Section: Introductionmentioning

confidence: 99%

“…The excitement of surface plasmon resonance is accompanied by the increased luminescence of the medium, absorption of light radiation, Raman scattering, etc. One of the promising applications of systems where surface plasmon resonance is excited is optical sensors for biological medium analysis [2][3][4][5]. The prospects of optical sensors based on surface plasmon resonance are caused by their non-invasiveness, speed, high sensitivity, availability, and simplicity [2,5].…”

Section: Introductionmentioning

confidence: 99%

Electrical Conductivity and Optical Properties of Nanoscale Titanium Films on Sapphire for Localized Plasmon Resonance-Based Sensors

et al. 2020

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The developing area of plasmonics has led to the possibility of creating a new type of high-speed, high-sensitivity optical sensor for biological environment analysis. The functional layer of such biosensors are nanoscale films of noble metals. In this work we suggest using a thin film of titanium as a functional layer. This paper presents the results of the research on electrical and optical characteristics of 5 to 80 nm thick titanium films deposited on sapphire substrates by magnetron sputtering. It is shown that surface plasmon resonance is consistently observed in the investigated titanium films and the theoretical grounds of surface plasmon resonance excitement is given. In structures with titanium films less than 15 nm thick, local plasmon resonance is observed along with surface plasmon resonance. Local plasmon resonance is more sensitive to the surface state of a thin film of titanium, which on the one hand increases the sensitivity of a biosensor, and on the other hand imposes restrictions on the parameters of nanoscale films.

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Optoelectronic method for analysis of biomolecular interaction dynamics

Cited by 4 publications

References 6 publications

Investigation of magneto-optical properties of ferrofluids by laser light scattering techniques

Investigation of magneto-optical properties of ferrofluids by laser light scattering techniques

Agglomeration of magnetite nanoparticles with citrate shell in an aqueous magnetic fluid

Electrical Conductivity and Optical Properties of Nanoscale Titanium Films on Sapphire for Localized Plasmon Resonance-Based Sensors

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