In Situ Synthesis of Metal Nanoparticles and Selective Naked-Eye Detection of Lead Ions from Aqueous Media
By K. Yoosaf, Binil Itty Ipe, C. Suresh, K. G. Thomas. 2007
390 citations recorded by the source corpus.
A novel one step synthesis of water soluble Au and Ag nanoparticles has been reported at room temperature using a naturally occurring bifunctional molecule, namely, gallic acid. The mechanistic details of nanoparticle formation were elucidated by carrying out control experiments using a variety of model compounds. The newly synthesized nanoparticles are extremely stable in the pH range of 4.5−5.0, due to (i) the strong electrostatic interaction of the carboxylate anion of the capping agent with the surface of the nanoparticle and (ii) a very high ζ potential (−45 mV). Under these pH conditions, it is difficult to bring nanoparticles in proximity due to strong interparticle electrostatic repulsion. However, the unique coordination behavior of Pb2+ ions (coordination number up to 12, flexible bond length and geometry) allows the formation of a stable supramolecular complex resulting in plasmon coupling and a visual color change. Because of the rigid coordination geometry, other metal cations (Ca2+, Cu2+, Cd...
Subfields: Electronic, Optical and Magnetic Materials, Materials Chemistry, Spectroscopy
View Paper: https://www.semanticscholar.org/paper/70dccb60fb1cbf4899a641e724902915088997c3
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In Electronic, Optical and Magnetic Materials
In Materials Chemistry
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- A. Chaudhari
- Arun G. Ingale
- C. Borsarelli
- Alicia V. Veglia
- N. L. Pacioni
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- Kwang-Hyun Baek
In Spectroscopy
Citations in the corpus
- Biogenic Synthesis of Nanoparticles and Potential Applications: An Eco- Friendly Approach (2013, methodology): “Furthermore, X-ray diffraction is exercise for the determination of crystallinity, while UV– Vis spectroscopy is utilized to confirm sample formation by exhibiting the Plasmon resonance [69-78].”
- Cashew Apple Juice (Anacardium occidentale L.) Speeds Up the Synthesis of Silver Nanoparticles (2012, background): “[ 24 – 26 ] These results indicated that the site(s) and number of hydroxyl groups on the phenol (at the ortho or para positions) are related to their reducing potential to undergo two-electron oxidation to the corresponding quinone form facilitate reduction of silver ions ( Figure ”
- Synthetic Routes for the Preparation of Silver Nanoparticles (2015, background): “For example, Pastoriza-Santos and Liz-Marzan [38] proposed a synthetic route to obtain AgNP spheres (≈6–20 nm) from the spontaneous reduction of silver Scheme 2 Two-electron oxidation of gallic acid to the quinone form [33]”