TY - JOUR
T1 - Size controlled gold nanoparticle formation by Avena sativa biomass
T2 - Use of plants in nanobiotechnology
AU - Armendariz, Veronica
AU - Herrera, Isaac
AU - Peralta-Videa, Jose R.
AU - Jose-Yacaman, Miguel
AU - Troiani, Horacio
AU - Santiago, Patricia
AU - Gardea-Torresdey, Jorge L.
N1 - Funding Information:
The authors would like to acknowledge the National Institutes of Health (Grant S06 GM8012-33) and the University of Texas at El Paso’s Center for Environmental Resource Management (CERM) through funding from the Office of Exploratory Research of the US Environmental protection Agency (cooperative agreement CR-819849-01). We also thank the financial support from the Southwest Center for Environmental Research and Policy (SCERP) program, and the HBCU/MI Environmental Technology Consortium that is funded by the Department of Energy. In addition, we acknowledge the financial support of the National Institute of Health (NIH) through the Minority Access for Research Careers Program MARC and the support of the Model Institutes for Excellence Program MIE at the University of Texas at El Paso. Dr. Gardea-Torresdey also acknowledges the funding from the National Institute of Environmental Health Sciences (Grant R01ES11367-01).
PY - 2004/8
Y1 - 2004/8
N2 - Oat (Avena sativa) biomass was studied as an alternative to recover Au(III) ions from aqueous solutions and for its capacity to reduce Au(III) to Au(0) forming Au nanoparticles. To study the binding trend of Au(III) to oat and the possible formation of Au nanoparticles, the biomass and a solution of Au(III) were reacted for a period of 1 h at pH values ranging from 2 to 6. The results demonstrated that Au(III) ions were bound to oat biomass in a pH-dependent manner, with the highest adsorption (about 80%) at pH 3. HRTEM studies showed that oat biomass reacted with Au(III) ions formed Au nanoparticles of fee tetrahedral, decahedral, hexagonal, icosahedral multitwinned, irregular, and rod shape. To our knowledge, this is the second report about the production of nanorods as a product of the reaction of a Au(III) solution with a biological material. These studies also showed that the pH of the reaction influenced the nanoparticle size. The smaller nanoparticles and the higher occurrence of these were observed at pH values of 3 and 4, whereas the larger nanoparticles were observed at pH 2.
AB - Oat (Avena sativa) biomass was studied as an alternative to recover Au(III) ions from aqueous solutions and for its capacity to reduce Au(III) to Au(0) forming Au nanoparticles. To study the binding trend of Au(III) to oat and the possible formation of Au nanoparticles, the biomass and a solution of Au(III) were reacted for a period of 1 h at pH values ranging from 2 to 6. The results demonstrated that Au(III) ions were bound to oat biomass in a pH-dependent manner, with the highest adsorption (about 80%) at pH 3. HRTEM studies showed that oat biomass reacted with Au(III) ions formed Au nanoparticles of fee tetrahedral, decahedral, hexagonal, icosahedral multitwinned, irregular, and rod shape. To our knowledge, this is the second report about the production of nanorods as a product of the reaction of a Au(III) solution with a biological material. These studies also showed that the pH of the reaction influenced the nanoparticle size. The smaller nanoparticles and the higher occurrence of these were observed at pH values of 3 and 4, whereas the larger nanoparticles were observed at pH 2.
KW - Gold
KW - Nanobiotechnology
KW - Nanoparticles
KW - Oat biomass
KW - pH
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UR - http://www.scopus.com/inward/citedby.url?scp=8844252974&partnerID=8YFLogxK
U2 - 10.1007/s11051-004-0741-4
DO - 10.1007/s11051-004-0741-4
M3 - Article
AN - SCOPUS:8844252974
SN - 1388-0764
VL - 6
SP - 377
EP - 382
JO - Journal of Nanoparticle Research
JF - Journal of Nanoparticle Research
IS - 4
ER -