title: Tragacanth gum biopolymer as reducing and stabilizing agent in biosonosynthesis of urchin-like ZnO nanorod arrays: A low cytotoxic photocatalyst with antibacterial and antifungal properties.
abstract: Tragacanth, a natural gum, has been used for centuries as emulsifier, thickener, stabilizer and binder in various fields such as food, medical and cosmetic industries. In this study, Tragacanth gum was used as a clean and natural reducing and stabilizing agent for preparation of urchin-like ZnO nanorod arrays at low-temperature using ultrasonic irradiation. The morphology and structure of urchin-like ZnO nanorod arrays was investigated by XRD, FESEM images, EDX, UV-vis and FT-IR spectroscopy. The hexagonal zinc oxide nanorods were synthesized with the average diameter of 55-80 nm and length of 240 nm. The peak appeared in 447 cm(-1) in FTIR spectra and the peak around 362.3 nm in UV-vis spectra of ZnO nanorods confirmed the successful synthesis of ZnO nanorods. The urchin-like ZnO nanorod arrays indicated a good photocatalytic activity through degradation of methylene blue with 92.2% efficiency and rate constant of 0.0027 min(-1) at 120 min. Finally, the synthesized urchin-like ZnO nanorod arrays indicated 100% antibacterial activity against S. aureus and E. coli and 93% antifungal activity against C. albicans with a low cytotoxicity.
authors.affiliation: Textile Engineering Department, Functional Fibrous Structures & Environmental Enhancement (FFSEE), Amirkabir University of Technology, Tehran, Iran.
authors.forename: Soraya
authors.initials: S
authors.lastname: Ghayempour
authors.affiliation: Textile Engineering Department, Functional Fibrous Structures & Environmental Enhancement (FFSEE), Amirkabir University of Technology, Tehran, Iran. Electronic address: tex5mm@aut.ac.ir.
authors.forename: Majid
authors.initials: M
authors.lastname: Montazer
authors.affiliation: Skin Research Centre, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
authors.forename: Mahnaz
authors.initials: M
authors.lastname: Mahmoudi Rad
mesh_terms: D000900:Anti-Bacterial Agents / Q000138:chemical synthesis / Q000737:chemistry / Q000494:pharmacology / Q000633:toxicity; D000935:Antifungal Agents / Q000138:chemical synthesis / Q000737:chemistry / Q000494:pharmacology / Q000633:toxicity; D002384:Catalysis; D002470:Cell Survival / Q000187:drug effects; D060326:Chemistry Techniques, Synthetic; D005079:Excipients / Q000737:chemistry; D005347:Fibroblasts / Q000166:cytology / Q000187:drug effects; D006801:Humans; D053758:Nanoparticles / Q000737:chemistry; D036103:Nanotechnology; D043942:Nanotubes / Q000737:chemistry* / Q000633:toxicity; D055668:Photochemical Processes; D019163:Reducing Agents / Q000737:chemistry; D014144:Tragacanth / Q000737:chemistry*; D000069453:Ultrasonic Waves; D015034:Zinc Oxide / Q000138:chemical synthesis / Q000737:chemistry* / Q000494:pharmacology* / Q000633:toxicity
chemical_list: D000900:Anti-Bacterial Agents; D000935:Antifungal Agents; D005079:Excipients; D019163:Reducing Agents; D014144:Tragacanth; D015034:Zinc Oxide
keywords: Antibacterial and antifungal activity; Photocatalytic activity; Tragacanth gum; Ultrasonic; Urchin-like ZnO nanorod arrays