TY - JOUR

T1 - Flower-like silver nanocrystals: facile synthesis via a gas–solution interface technique

AU - Gulina, Larisa B.

AU - Tolstoy, Valeri P.

AU - Kasatkin, Igor A.

AU - Fateev, Sergey A.

PY - 2018/6

Y1 - 2018/6

N2 - In this paper, flower-like Ag nanocrystals and their fractal networks were successfully synthesized by gas–solution interface technique at the surface of AgNO3 water solution with the assistance of ammonium citrate and of gaseous N2H4 used as reductant. The synthesized flower-like silver structure consisted of a large number of petal-like silver nanoplates. They were characterized by scanning and transmission electron microscopy, absorption UV–Vis spectroscopy, and X-ray diffraction. In addition to the standard silver fcc modification, the nanostructures contained the hexagonal polymorph (4H-Ag) in the amount of about 5%. The effect of pH of the solution on the morphology of nanoparticles and on the silver crystal structure was examined. Depending on the time of treatment with gaseous hydrazine, it was possible to obtain either separate flower-like nanoparicles and their fractal networks, or continuous films formed by rather closely packed petal-like nanoparticles. The surface-enhanced Raman scattering effect was observed, and the most intense interaction of laser beam with the silver nanoparticles occurred when the solution side of the synthesized film was irradiated.

AB - In this paper, flower-like Ag nanocrystals and their fractal networks were successfully synthesized by gas–solution interface technique at the surface of AgNO3 water solution with the assistance of ammonium citrate and of gaseous N2H4 used as reductant. The synthesized flower-like silver structure consisted of a large number of petal-like silver nanoplates. They were characterized by scanning and transmission electron microscopy, absorption UV–Vis spectroscopy, and X-ray diffraction. In addition to the standard silver fcc modification, the nanostructures contained the hexagonal polymorph (4H-Ag) in the amount of about 5%. The effect of pH of the solution on the morphology of nanoparticles and on the silver crystal structure was examined. Depending on the time of treatment with gaseous hydrazine, it was possible to obtain either separate flower-like nanoparicles and their fractal networks, or continuous films formed by rather closely packed petal-like nanoparticles. The surface-enhanced Raman scattering effect was observed, and the most intense interaction of laser beam with the silver nanoparticles occurred when the solution side of the synthesized film was irradiated.

KW - ENHANCED RAMAN-SPECTROSCOPY

KW - SERS APPLICATION

KW - CITRIC-ACID

KW - NANOPARTICLES

KW - NANOSTRUCTURES

KW - FABRICATION

KW - NANOWIRES

KW - CITRATE

KW - LAF3

KW - SCATTERING

UR - http://www.scopus.com/inward/record.url?scp=85044108094&partnerID=8YFLogxK

UR - http://link.springer.com/10.1007/s10853-018-2164-0

UR - http://www.mendeley.com/research/flowerlike-silver-nanocrystals-facile-synthesis-via-gassolution-interface-technique

U2 - 10.1007/s10853-018-2164-0

DO - 10.1007/s10853-018-2164-0

M3 - Article

AN - SCOPUS:85044108094

VL - 53

SP - 8161

EP - 8169

JO - Journal of Materials Science

JF - Journal of Materials Science

SN - 0022-2461

IS - 11

ER -