PMID- 31671904 OWN - NLM STAT- MEDLINE DCOM- 20200327 LR - 20231019 IS - 1422-0067 (Electronic) IS - 1422-0067 (Linking) VI - 20 IP - 21 DP - 2019 Oct 29 TI - Antibacterial Property of Composites of Reduced Graphene Oxide with Nano-Silver and Zinc Oxide Nanoparticles Synthesized Using a Microwave-Assisted Approach. LID - 10.3390/ijms20215394 [doi] LID - 5394 AB - Graphene oxide (GO) composites with various metal nanoparticles (NPs) are attracting increasing interest owing to their broad scope in biomedical applications. Here, microwave-assisted chemical reduction was used to deposit nano-silver and zinc oxide NPs (Ag and ZnO NPs) on the surface of reduced GO (rGO) at the following weight percentages: 5.34% Ag/rGO, 7.49% Ag/rGO, 6.85% ZnO/rGO, 16.45% ZnO/rGO, 3.47/34.91% Ag/ZnO/rGO, and 7.08/15.28% Ag/ZnO/rGO. These materials were tested for antibacterial activity, and 3.47/34.91% Ag/ZnO/rGO and 7.08/15.28% Ag/ZnO/rGO exhibited better antibacterial activity than the other tested materials against the gram-negative bacterium Escherichia coli K12. At 1000 ppm, both these Ag/ZnO/rGO composites had better killing properties against both E. coli K12 and the gram-positive bacterium Staphylococcus aureus SA113 than Ag/rGO and ZnO/rGO did. RedoxSensor flow cytometry showed that 3.47/34.91% Ag/ZnO/rGO and 7.08/15.28% Ag/ZnO/rGO decreased reductase activity and affected membrane integrity in the bacteria. At 100 ppm, these two composites affected membrane integrity more in E. coli, while 7.08/15.28% Ag/ZnO/rGO considerably decreased reductase activity in S. aureus. Thus, the 3.47/34.91% and 7.08%/15.28% Ag/ZnO/rGO nanocomposites can be applied not only as antibacterial agents but also in a variety of biomedical materials such as sensors, photothermal therapy, drug delivery, and catalysis, in the future. FAU - Hsueh, Yi-Huang AU - Hsueh YH AD - Department of Seafood Science, National Kaohsiung University of Science and Technology, Kaohsiung 81143, Taiwan. yihhsueh@nkust.edu.tw. FAU - Hsieh, Chien-Te AU - Hsieh CT AD - Department of Chemical Engineering and Materials Science, Yuan Ze University, Taoyuan 32003, Taiwan. cthsieh@saturn.yzu.edu. FAU - Chiu, Shu-Ting AU - Chiu ST AD - Department of Chemical Engineering and Materials Science, Yuan Ze University, Taoyuan 32003, Taiwan. qcricnt@hotmail.com. FAU - Tsai, Ping-Han AU - Tsai PH AD - Graduate School of Biotechnology and Bioengineering, Yuan Ze University, Taoyuan 32003, Taiwan. n8808701@gmail.com. FAU - Liu, Chia-Ying AU - Liu CY AD - Department of Internal Medicine, Far Eastern Memorial Hospital, New Taipei City 220, Taiwan. chiaying.liu@gmail.com. FAU - Ke, Wan-Ju AU - Ke WJ AD - Graduate Institute of Biomedical Sciences, and Research Center for Bacterial Pathogenesis, Chang Gung University, Taoyuan 33302, Taiwan. d8901005@stmail.cgu.edu.tw. LA - eng GR - 107-2221-E-155 -021 -/Ministry of Science & Technology of Taiwan, R.O.C/ PT - Journal Article DEP - 20191029 PL - Switzerland TA - Int J Mol Sci JT - International journal of molecular sciences JID - 101092791 RN - 0 (Anti-Bacterial Agents) RN - 0 (graphene oxide) RN - 3M4G523W1G (Silver) RN - 7782-42-5 (Graphite) RN - SOI2LOH54Z (Zinc Oxide) SB - IM MH - Anti-Bacterial Agents/chemistry/*pharmacology MH - Drug Delivery Systems/methods MH - Escherichia coli/drug effects MH - Graphite/chemistry/*pharmacology MH - Metal Nanoparticles/*chemistry MH - Microbial Sensitivity Tests MH - Microscopy, Electron, Scanning MH - Microwaves MH - Nanocomposites/chemistry MH - Particle Size MH - Silver/chemistry/*pharmacology MH - Spectroscopy, Fourier Transform Infrared MH - Staphylococcus aureus/drug effects MH - X-Ray Diffraction MH - Zinc Oxide/chemistry/*pharmacology PMC - PMC6862684 OTO - NOTNLM OT - Escherichia coli OT - Staphylococcus aureus OT - antibacterial agents OT - graphene OT - minimum inhibitory concentration OT - nano-silver OT - nanocomposite OT - sterilization COIS- The authors declare no conflict of interest. EDAT- 2019/11/02 06:00 MHDA- 2020/03/28 06:00 PMCR- 2019/11/01 CRDT- 2019/11/02 06:00 PHST- 2019/09/03 00:00 [received] PHST- 2019/10/28 00:00 [revised] PHST- 2019/10/28 00:00 [accepted] PHST- 2019/11/02 06:00 [entrez] PHST- 2019/11/02 06:00 [pubmed] PHST- 2020/03/28 06:00 [medline] PHST- 2019/11/01 00:00 [pmc-release] AID - ijms20215394 [pii] AID - ijms-20-05394 [pii] AID - 10.3390/ijms20215394 [doi] PST - epublish SO - Int J Mol Sci. 2019 Oct 29;20(21):5394. doi: 10.3390/ijms20215394.