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Agglomeration behavior of lipid-capped gold nanoparticles / R. Ranjan [et al.] // J. Nanopart. Res. - 2018. - Vol. 20, Is. 4. - Ст. 107, DOI 10.1007/s11051-018-4215-5. - Cited References:35. - The research was supported by the Russian Foundation for Basic Research [project no. 16-34-60100] and the state budget allocated to the fundamental research (project no. 0356-2017-0017). The authors thank Prof. Tatiana Volova, Prof. Evgenia Slyusareva, and Ms. Nina Slyusarenko of the Siberian Federal University for their assistance in the zeta potential and zeta-average analysis. . - ISSN 1388-0764. - ISSN 1572-896X

РУБ Chemistry, Multidisciplinary + Nanoscience & Nanotechnology + Materials
Рубрики:
COLORIMETRIC SENSOR ARRAY
   OPTICAL-PROPERTIES
   AGGREGATION
   CANCER
Кл.слова (ненормированные):
Gold nanoparticles -- Ionic interference -- Agglomeration -- Stabilization -- Lipid capping -- Nanobiotechnology applications
Аннотация: The current investigation deciphers aggregation pattern of gold nanoparticles (AuNPs) and lipid-treated AuNPs when subjected to aqueous sodium chloride solution with increasing ionic strengths (100-400 nM). AuNPs were synthesized using 0.29 mM chloroauric acid and by varying the concentrations of trisodium citrate (AuNP1 1.55 mM, AuNP2 3.1 mM) and silver nitrate (AuNP3 5.3 mu M, AuNP4 10.6 mu M) with characteristic LSPR peaks in the range of 525-533 nm. TEM analysis revealed AuNPs to be predominantly faceted nanocrystals with the average size of AuNP1 to be 35 +/- 5 nm, AuNP2 15 +/- 5 nm, AuNP3 30 +/- 5 nm, and AuNP4 30 +/- 5 nm and the zeta-average for AuNPs were calculated to be 31.23, 63.80, 26.08, and 28 nm respectively. Induced aggregation was observed within 10 s in all synthesized AuNPs while lipid-treated AuNP2 (AuNP2-L) was found to withstand ionic interferences at all concentration levels. However, lipid-treated AuNPs synthesized using silver nitrate and 1.55 mM trisodium citrate (AuNP3, AuNP4) showed much lower stability. The zeta potential values of lipid-treated AuNPs (AuNP1-L-1x/200, -17.93 +/- 1.02 mV; AuNP2-L-1x/200, -21.63 +/- 0.70; AuNP3-L-1x/200, -14.54 +/- 0.90; AuNP3-L-1x/200 -13.77 +/- 0.83) justified these observations. To summarize, AuNP1 and AuNP2 treated with lipid mixture 1 equals or above 1x/200 or 1x/1000 respectively showed strong resistance against ionic interferences (up to 400 mM NaCl). Use of lipid mixture 1 for obtaining highly stable AuNPs also provided functional arms of various lengths which can be used for covalent coupling.

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Держатели документа:
Siberian Fed Univ, Inst Fundamental Biol & Biotechnol, Dept Biophys, Lab Bioluminescent Biotechnol, 79 Svobodny Prospect, Krasnoyarsk 660041, Russia.
RAS, Krasnoyarsk Sci Ctr SB, Fed Res Ctr, Inst Biophys, Akademgorodok 50-50, Krasnoyarsk 660036, Russia.
RAS, Krasnoyarsk Sci Ctr SB, Fed Res Ctr, Kirensky Inst Phys, Akademgorodok 50-38, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Electron Microscopy Lab, 79 Svobodny Prospect, Krasnoyarsk 660041, Russia.

Доп.точки доступа:
Ranjan, Rajeev; Kirillova, Maria A.; Esimbekova, Elena N.; Zharkov, Sergey M.; Kratasyuk, Valentina A.; Russian Foundation for Basic Research [16-34-60100]; [0356-2017-0017]

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Effect of laser-radiation polarization on the nonlinear scattering of light in nanodiamond suspensions [Text] / G. M. Mikheev [et al.] // Tech. Phys. Lett. - 2014. - Vol. 40, Is. 7. - P609-613, DOI 10.1134/S1063785014070220. - Cited References: 19. - This study was supported in part by the Russian Foundation for Basic Research (project no. 13-02-96016r_ural_a), the Presidium of the Ural Branch of the Russian Academy of Sciences (project no. 12-S-1-1003), and the Academy of Finland (grant no. 278252). . - ISSN 1063-7850. - ISSN 1090-6533

РУБ Physics, Applied
Рубрики:
CARBON NANOTUBE SUSPENSIONS
DETONATION NANODIAMOND
OPTICAL-PROPERTIES
Аннотация: The effect of laser radiation polarization on the nonlinear scattering of light in aqueous suspensions of detonation nanodiamonds (DNDs) in a regime of optical power limiting (OPL) has been studied. It is established that the nonlinear transmission coefficient of DND suspension in the OPL regime in a field of nanosecond laser pulses with a wavelength of 532 nm is independent of the polarization of incident radiation. The nonlinear scattering of light observed at an angle of 90A degrees in the plane perpendicular to the plane of polarization of the incident radiation depends on the polarization angle in accordance with a trigonometric law. It is shown that the ratio of the signals of scattered radiation for the vertical and horizontal polarizations exhibits nonmonotonic dependence on the laser-beam power density. The results are explained by the Rayleigh-Mie scattering and a change in the size of scattering centers as a result of the effect of a laser upon the DND suspension.

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Scopus
Держатели документа:
[Mikheev, G. M.] Russian Acad Sci, Inst Mech, Ural Branch, Izhevsk 426067, Russia
Univ Eastern Finland, Inst Photon, FI-80101 Joensuu, Finland
Russian Acad Sci, Inst Biophys, Siberian Branch, Krasnoyarsk 660036, Russia
ИБФ СО РАН : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Mikheev, G.M.; Vanyukov, V.V.; Mogileva, T.N.; Puzyr', A.P.; Bondar', V.S.; Svirko, Y.P.; Russian Foundation for Basic Research [13-02-96016r_ural_a]; Presidium of the Ural Branch of the Russian Academy of Sciences [12-S-1-1003]; Academy of Finland [278252]

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