title: Identification of silver cubic structures during ultrasonication of chitosan AgNO3 solution.
abstract: During ultrasonication of chitosan AgNO3 solution (10mM), silver cubic structures were identified along with other dispersed silver nanoparticles. Temperature influenced the formation of the cubic structures. Formation of the silver cubic structures occurred via initial formation of 'four petal flower-like' structures that underwent transformation to the "cubic morphology" in the latter stages. Aging of the reaction mixture led to formation of complete dendrites. These dendrites comprised a large quantity of silver nanoparticles. Upon repetition of the experiment with starch instead of chitosan, the identified silver cubic structures were completely absent, indicating that formation of the 'silver cubic structures' is dependent on the polysaccharide used. It is believed that the structural features of chitosan facilitate the formation of 'silver cubic structures' under ultrasonic conditions. The phenomena occurring during the experiments were evaluated via scanning electron microscopy-energy dispersive spectroscopy (SEM-EDS), ultraviolet-visible (UV-vis) spectra, transmission electron microscopy (TEM), and selected area electron diffraction (SAED) analysis.
authors: Department of Packaging, Yonsei University, Kangwondo 220-710, Republic of Korea.
authors: Gownolla Malegowd
authors: GM
authors: Raghavendra
authors: Department of Packaging, Yonsei University, Kangwondo 220-710, Republic of Korea.
authors: Jeyoung
authors: J
authors: Jung
authors: Department of Packaging, Yonsei University, Kangwondo 220-710, Republic of Korea.
authors: Dowan
authors: D
authors: Kim
authors: Centro de Investigación de Polímeros Avanzados (CIPA), Av. Collao 1202, Direccion General de Investigación, Universidad del Bio-Bio, Concepción, Chile.
authors: Kokkarachedu
authors: K
authors: Varaprasad
authors: Department of Packaging, Yonsei University, Kangwondo 220-710, Republic of Korea. Electronic address: jcseo@yonsei.ac.kr.
authors: Jongchul
authors: J
authors: Seo
mesh_terms: D048271:Chitosan / Q000737:chemistry*; D012834:Silver / Q000737:chemistry*; D012835:Silver Nitrate / Q000737:chemistry*; D000069453:Ultrasonic Waves
chemical_list: D012834:Silver; D048271:Chitosan; D012835:Silver Nitrate
keywords: Dendrite; Four petal flower; Silver cubic structure; Silver nanoparticles; Ultrasonication