TY - JOUR
T1 - Gold nanoparticles obtained by bio-precipitation from gold(III) solutions
AU - Gardea-Torresdey, J. L.
AU - Tiemann, K. J.
AU - Gamez, G.
AU - Dokken, K.
AU - Tehuacanero, S.
AU - José-Yacamán, M.
N1 - Funding Information:
The authors are indebted to Mr. Luis Rendón for the electron micrographs and to CONACYT for their financial support through the grant ‘colloides cuanticos’. Also, we acknowledge the University of Texas at El Paso Center for Environmental Resource Management (CERM) through funding from the HBCU/MI Environmental Technology Consortium which is funded by the Department of Energy and the Office of Exploratory Research of the US Environmental Protection Agency (cooperative agreement CR-819849-01-4).
PY - 1999
Y1 - 1999
N2 - The use of metal nanoparticles has shown to be very important in recent industrial applications. Currently gold nanoparticles are being produced by physical methods such as evaporation. Biological processes may be an alternative to physical methods for the production of gold nanoparticles. Alfalfa biomass has shown to be effective at passively binding and reducing gold from solutions containing gold(III) ions and resulting in the formation of gold(0) nanoparticles. High resolution microscopy has shown that five different types of gold particles are present after reaction with gold(III) ions with alfalfa biomass. These particles include: fee tetrahedral, hexagonal platelet, icosahedral multiple twinned, decahedral multiple twinned, and irregular shaped particles. Further analysis on the frequency of distribution has shown that icosahedral and irregular particles are more frequently formed. In addition, the larger particles observed may be formed through the coalescence of smaller particles. Through modification of the chemical parameters, more uniform particle size distribution may be obtained by the alfalfa bio-reduction of gold(III) from solution.
AB - The use of metal nanoparticles has shown to be very important in recent industrial applications. Currently gold nanoparticles are being produced by physical methods such as evaporation. Biological processes may be an alternative to physical methods for the production of gold nanoparticles. Alfalfa biomass has shown to be effective at passively binding and reducing gold from solutions containing gold(III) ions and resulting in the formation of gold(0) nanoparticles. High resolution microscopy has shown that five different types of gold particles are present after reaction with gold(III) ions with alfalfa biomass. These particles include: fee tetrahedral, hexagonal platelet, icosahedral multiple twinned, decahedral multiple twinned, and irregular shaped particles. Further analysis on the frequency of distribution has shown that icosahedral and irregular particles are more frequently formed. In addition, the larger particles observed may be formed through the coalescence of smaller particles. Through modification of the chemical parameters, more uniform particle size distribution may be obtained by the alfalfa bio-reduction of gold(III) from solution.
KW - Bio-reduction method
KW - Coalescence
KW - Gold colloids
KW - Irregular shaped nanoparticles
KW - Particle synthesis
UR - http://www.scopus.com/inward/record.url?scp=0000629491&partnerID=8YFLogxK
U2 - 10.1023/A:1010008915465
DO - 10.1023/A:1010008915465
M3 - Article
AN - SCOPUS:0000629491
VL - 1
SP - 397
EP - 404
JO - Journal of Nanoparticle Research
JF - Journal of Nanoparticle Research
SN - 1388-0764
IS - 3
ER -