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Qiu C, Liu Z, Rao Q, Yang H, He Y, Li D, Zhong Y, Lin J, Li H, Huang G, Lin H, Shen J, Zhang X, Zhang Z, Wang X, Fu X. Prohibiting the electron-phonon coupling effect in tungsten trioxide nanosheet colloid with enhanced photocatalytic antibacterial capacity. J Colloid Interface Sci 2024; 678:1135-1147. [PMID: 39278039 DOI: 10.1016/j.jcis.2024.09.082] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2024] [Revised: 07/30/2024] [Accepted: 09/08/2024] [Indexed: 09/17/2024]
Abstract
The serious combination of abundant electrons/holes in bulk primarily hinders the efficiency in the photocatalytic reaction. It is crucial to control the spatial charge dynamics through delicately designing the crystal configuration of photocatalyst. In this work, a modified tungsten trioxide nanosheet colloid (M-WO3) was synthesized by an ion exchange method. Compared to pristine WO3 (P-WO3), the crystal lattice vibration frequency of M-WO3 increases from 2.8 meV to 4.3 meV, which effectively prohibits electron-phonon coupling and powerfully accelerates the separation and transfer of photoinduced charge carriers. Irradiated by visible-light, M-WO3 shows much higher photocatalytic bacterial inactivation performance than P-WO3. In addition, this regulation method increases the surface charges of the WO3 colloid to improve its stability, which endows this colloid photocatalyst with broad prospects in practical photocatalytic antibacterial applications. This work offers guidance to construct efficiently separated photoinduced electron/hole pairs of the colloid photocatalyst by designing its crystal structure.
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Affiliation(s)
- Chengwei Qiu
- State Key Lab of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou 350116, China
| | - Zhihua Liu
- The Second Affiliated Hospital of Fujian Medical University, Quanzhou 362000, China
| | - Qin Rao
- State Key Lab of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou 350116, China
| | - Hui Yang
- State Key Lab of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou 350116, China
| | - Yuxin He
- Department of Environmental and Safety Engineering, Fuzhou University, Fuzhou 350116, China
| | - Dongmiao Li
- State Key Lab of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou 350116, China
| | - Yuhua Zhong
- State Key Lab of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou 350116, China
| | - Jianhan Lin
- State Key Lab of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou 350116, China
| | - Haifeng Li
- State Key Lab of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou 350116, China
| | - Guocheng Huang
- Department of Environmental and Safety Engineering, Fuzhou University, Fuzhou 350116, China
| | - Huaxiang Lin
- State Key Lab of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou 350116, China
| | - Jinni Shen
- State Key Lab of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou 350116, China
| | - Xiaoyan Zhang
- Key Laboratory of Chemical Materials and Green Nanotechnology, Key Laboratory of Fujian Provincial Higher Education, College of Chemical Engineering and Materials Science, Quanzhou Normal University, Quanzhou 362000, China.
| | - Zizhong Zhang
- State Key Lab of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou 350116, China.
| | - Xuxu Wang
- State Key Lab of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou 350116, China
| | - Xianzhi Fu
- State Key Lab of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou 350116, China
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2
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Mazumder JA, Ahmad A, Ali J, Noori R, Bhuyan T, Sardar M, Sheehan D. Biomimetic green synthesis of ZnO nanoflowers using α-amylase: from antimicrobial to toxicological evaluation. Sci Rep 2024; 14:16566. [PMID: 39019931 PMCID: PMC11254910 DOI: 10.1038/s41598-024-66140-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2023] [Accepted: 06/27/2024] [Indexed: 07/19/2024] Open
Abstract
Biologically mediated synthesis of nanomaterials has emerged as an ecologically benign and biocompatible approach. Our study explores enzymatic synthesis, utilizing α-amylase to synthesize ZnO nanoflowers (ZnO-NFs). X-ray diffraction and energy-dispersive X-ray spectroscopy revealed crystal structure and elemental composition. Dynamic light scattering analysis indicates that ZnO-NFs possess a size of 101 nm. Transmission electron microscopy showed a star-shaped morphology of ZnO-NFs with petal-like structures. ZnO-NFs exhibit potent photocatalytic properties, degrading 90% eosin, 87% methylene blue, and 81% reactive red dyes under UV light, with kinetics fitting the Langmuir-Hinshelwood pseudo-first-order rate law. The impact of pH and interfering substances on dye degradation was explored. ZnO-NFs display efficient bacteriocidal activity against different Gram-positive and negative strains, antibiofilm potential (especially with P. aeruginosa), and hemocompatibility up to 600 ppm, suggesting versatile potential in healthcare and environmental remediation applications.
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Affiliation(s)
- Jahirul Ahmed Mazumder
- Department of Chemistry, Khalifa University of Science and Technology, PO Box 127788, Abu Dhabi, United Arab Emirates.
| | - Atika Ahmad
- Department of Chemistry, Khalifa University of Science and Technology, PO Box 127788, Abu Dhabi, United Arab Emirates
| | - Juned Ali
- Department of Biosciences, Jamia Millia Islamia, New Delhi, 110025, India
| | - Rubia Noori
- Department of Biosciences, Jamia Millia Islamia, New Delhi, 110025, India
| | - Tamanna Bhuyan
- Department of Applied Biology, School of Biological Sciences, University of Science and Technology Meghalaya, Ri Bhoi, India
| | - Meryam Sardar
- Department of Biosciences, Jamia Millia Islamia, New Delhi, 110025, India
| | - David Sheehan
- Department of Chemistry, Khalifa University of Science and Technology, PO Box 127788, Abu Dhabi, United Arab Emirates.
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3
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Zhang X, Huang Y, Wang J, Tang J, Mei Y, Zhu N, Li Z, Li L, Wang Y. Facet-dependent transformation and toxicity of nanoscale zinc oxide in the synthetic saliva. J Environ Sci (China) 2024; 139:170-181. [PMID: 38105045 DOI: 10.1016/j.jes.2023.05.033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2023] [Revised: 05/23/2023] [Accepted: 05/23/2023] [Indexed: 12/19/2023]
Abstract
The nanoscale zinc oxide (n-ZnO) was used in food packages due to its superior antibacterial activity, resulting in potential intake of n-ZnO through the digestive system, wherein n-ZnO interacted with saliva. In recent, facet engineering, a technique for controlling the exposed facets, was applied to n-ZnO, whereas risk of n-ZnO with specific exposed facets in saliva was ignored. ZnO nanoflakes (ZnO-0001) and nanoneedles (ZnO-1010) with the primary exposed facets of {0001} and {1010} respectively were prepared in this study, investigating stability and toxicity of ZnO-0001 and ZnO-1010 in synthetic saliva. Both ZnO-0001 and ZnO-1010 partially transformed into amorphous Zn3(PO4)2 within 1 hr in the saliva even containing orgnaic components, forming a ZnO-Zn3(PO4)2 core-shell structure. Nevertheless, ZnO-1010 relative to ZnO-0001 would likely transform into Zn3(PO4)2, being attributed to superior dissolution of {1010} facet due to its lower vacancy formation energy (1.15 eV) than {0001} facet (3.90 eV). The toxicity of n-ZnO to Caco-2 cells was also dependent on the primary exposed facet; ZnO-0001 caused cell toxicity through oxidative stress, whereas ZnO-1010 resulted in lower cells viability than ZnO-0001 through oxidative stress and membrane damage. Density functional theory calculations illustrated that ·O2- was formed and released on {1010} facet, yet O22- instead of ·O2- was generated on {0001} facet, leading to low oxidative stress from ZnO-0001. All findings demonstrated that stability and toxicity of n-ZnO were dependent on the primary exposed facet, improving our understanding of health risk of nanomaterials.
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Affiliation(s)
- Xiang Zhang
- School of Environment, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou 310024, China; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China; State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Yunpeng Huang
- Key Laboratory of Systems Health Science of Zhejiang Province, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou 310024, China
| | - Jikun Wang
- Department of Chemistry, University of Pennsylvania, Philadelphia 19104, USA
| | - Jie Tang
- School of Environment, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou 310024, China
| | - Yang Mei
- School of Environment, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou 310024, China
| | - Nali Zhu
- School of Environment, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou 310024, China
| | - Zhigang Li
- School of Environment, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou 310024, China
| | - Lingxiangyu Li
- School of Environment, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou 310024, China.
| | - Yawei Wang
- School of Environment, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou 310024, China; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China; State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
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4
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Li Y, Xue Y, Wang J, Zhang D, Zhao Y, Liu JJ. Antibacterial Hydrophilic ZnO Microstructure Film with Underwater Oleophobic and Self-Cleaning Antifouling Properties. NANOMATERIALS (BASEL, SWITZERLAND) 2024; 14:150. [PMID: 38251115 PMCID: PMC10820557 DOI: 10.3390/nano14020150] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/18/2023] [Revised: 12/22/2023] [Accepted: 01/03/2024] [Indexed: 01/23/2024]
Abstract
Super-hydrophilic and oleophobic functional materials can prevent pollution or adsorption by repelling oil, and have good circulation. However, traditional strategies for preparing these functional materials either use expensive fabrication machines or contain possibly toxic organic polymers, which may prohibit the practical application. The research of multifunctional ZnO microstructures or nanoarrays thin films with super-hydrophilic, antifouling, and antibacterial properties has not been reported yet. Moreover, the exploration of underwater oleophobic and self-cleaning antifouling properties in ZnO micro/nanostructures is still in its infancy. Here, we prepared ZnO microstructured films on fluorine-doped tin oxide substrates (F-ZMF) for the development of advanced self-cleaning type super-hydrophilic and oleophobic materials. With the increase of the accelerators, the average size of the F-ZMF microstructures decreased. The F-ZMF shows excellent self-cleaning performance and hydrophilic (water contact angle ≤ 10°) and oleophobic characteristics in the underwater antifouling experiment. Under a dark condition, F-ZMF-4 showed good antibacterial effects against Staphylococcus aureus (S. aureus) and Escherichia coli (E. coli) with inhibition rates of 99.1% and 99.9%, respectively. This study broadens the application scope of ZnO-based material and provides a novel prospect for the development of self-cleaning super-hydrophilic and oleophobic materials.
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Affiliation(s)
| | | | | | | | - Yan Zhao
- School of Physical Science and Technology, College of Energy Materials and Chemistry, Inner Mongolia University, Hohhot 010021, China; (Y.L.); (Y.X.); (J.W.); (D.Z.)
| | - Jun-Jie Liu
- School of Physical Science and Technology, College of Energy Materials and Chemistry, Inner Mongolia University, Hohhot 010021, China; (Y.L.); (Y.X.); (J.W.); (D.Z.)
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Wary RR, Narzary M, Brahma BB, Brahma D, Kalita P, Buzar Baruah M. Nanostructural Design of ZnO Using an Agro-Waste Extract for a Sustainable Process and Its Photocatalytic Activity. ACS APPLIED BIO MATERIALS 2023; 6:4645-4661. [PMID: 37938913 DOI: 10.1021/acsabm.3c00412] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2023]
Abstract
The use of agro-waste extracts (AWEs) as a sustainable medium for developing cost-effective and ecologically friendly nanomaterials has piqued the interest of current researchers. Herein, waste extracts from papaya barks, banana peels, thumba plants, and snail shells were used for synthesizing ZnO nanostructures via a hydrothermal method, followed by calcination at 400 °C. The crystallinity and pure wurtzite phase formation of ZnO nanostructures were confirmed via X-ray diffraction. ZnO nanostructures with various morphologies such as tight sheet-like, spherical, porous sheet-like, and bracket-shaped, comprising small interconnected particles with a highly catalytically active exposed (0001) facet, were observed via field emission scanning electron microscopy and transmission electron microscopy. The formation mechanism of the various morphologies of the ZnO nanostructures was proposed. Ultraviolet-visible spectra showed different absorption band edges of ZnO nanostructures with a bandgap in the range of 3.17-3.27 eV. Photoluminescence studies showed the presence of various defect states such as oxygen and zinc vacancies and oxygen and zinc interstitials on ZnO nanostructures, which are usually observed in traditionally prepared ZnO. The photocatalytic activity of ZnO nanostructures was evaluated under direct sunlight using rhodamine B (RhB) and Congo red (CR) dyes as probe pollutants. Furthermore, prepared ZnO nanostructures could potentially adsorb anionic dyes (e.g., CR) in the absence of light. Superoxide and hydroxide radicals played a vital role in the photocatalytic activity of ZnO. The photocatalyst could be reused for up to three cycles, indicating its stability. Therefore, this study reports the diverse use of AWEs as cost-effective media for nanomaterial synthesis.
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Affiliation(s)
- Riu Riu Wary
- Department of Physics, Central Institute of Technology Kokrajhar (Deemed to be University, MoE, Govt. of India), Kokrajhar 783370, Assam, India
| | - Mousumi Narzary
- Department of Physics, Central Institute of Technology Kokrajhar (Deemed to be University, MoE, Govt. of India), Kokrajhar 783370, Assam, India
| | - Bidhu Bhusan Brahma
- Department of Physics, Central Institute of Technology Kokrajhar (Deemed to be University, MoE, Govt. of India), Kokrajhar 783370, Assam, India
| | - Dulu Brahma
- Department of Chemistry, Central Institute of Technology Kokrajhar (Deemed to be University, MoE, Govt. of India), Kokrajhar 783370, Assam, India
| | - Pranjal Kalita
- Department of Chemistry, Central Institute of Technology Kokrajhar (Deemed to be University, MoE, Govt. of India), Kokrajhar 783370, Assam, India
| | - Manasi Buzar Baruah
- Department of Physics, Central Institute of Technology Kokrajhar (Deemed to be University, MoE, Govt. of India), Kokrajhar 783370, Assam, India
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6
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Nanozymes and nanoflower: Physiochemical properties, mechanism and biomedical applications. Colloids Surf B Biointerfaces 2023; 225:113241. [PMID: 36893662 DOI: 10.1016/j.colsurfb.2023.113241] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2022] [Revised: 02/08/2023] [Accepted: 03/03/2023] [Indexed: 03/07/2023]
Abstract
Natural enzymes possess several drawbacks which limits their application in industries, wastewater remediation and biomedical field. Therefore, in recent years researchers have developed enzyme mimicking nanomaterials and enzymatic hybrid nanoflower which are alternatives of enzyme. Nanozymes and organic inorganic hybrid nanoflower have been developed which mimics natural enzymes functionalities such as diverse enzyme mimicking activities, enhanced catalytic activities, low cost, ease of preparation, stability and biocompatibility. Nanozymes include metal and metal oxide nanoparticles mimicking oxidases, peroxidases, superoxide dismutase and catalases while enzymatic and non-enzymatic biomolecules were used for preparing hybrid nanoflower. In this review nanozymes and hybrid nanoflower have been compared in terms of physiochemical properties, common synthetic routes, mechanism of action, modification, green synthesis and application in the field of disease diagnosis, imaging, environmental remediation and disease treatment. We also address the current challenges facing nanozyme and hybrid nanoflower research and the possible way to fulfil their potential in future.
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7
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Gao Y, Meng S, Liu W, Zhang Y, Zhang Y, Dong A, Zhang L. Physical Contact-Triggered In Situ Reactivation of Antibacterial Hydrogels. ACS APPLIED MATERIALS & INTERFACES 2023; 15:7735-7746. [PMID: 36735761 DOI: 10.1021/acsami.2c19113] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
In situ reactivation of hydrogels remains a long-standing key challenge in chemistry and materials science. Herein, we first report an ultraconvenient in situ renewable antibacterial hydrogel prepared via a facile physical contact-triggered strategy based on an ultrafast chlorine transfer pathway. We discover that the as-proposed hydrogel with a programmable 3D network cross-linked by noncovalent bonds and physical interactions can serve as a smart platform for selective active chlorine transfer at the hydrogel/hydrogel interface. Systematic experiments and density functional theory prove that the N-halamine glycopolymers integrated into the hydrogel system work as a specific renewable biocide, permitting the final hydrogel to be recharged in situ within 1 min under ambient conditions. Due to its strength and durability, pathogen specificity, and biocompatibility, coupled with its rapid in situ reactivation, this antibacterial hydrogel holds great potential for in vivo biomedical use and circulating water disinfection. We envision this proposed strategy will pave a new avenue for the development of in situ renewable smart hydrogels for real-world applications.
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Affiliation(s)
- Yue Gao
- Engineering Research Center of Dairy Quality and Safety Control Technology, Ministry of Education, College of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot010021, People's Republic of China
| | - Suriguga Meng
- Engineering Research Center of Dairy Quality and Safety Control Technology, Ministry of Education, College of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot010021, People's Republic of China
| | - Wenxin Liu
- College of Chemistry and Materials Science, Inner Mongolia Minzu University, Tongliao028000, China
| | - Yu Zhang
- Engineering Research Center of Dairy Quality and Safety Control Technology, Ministry of Education, College of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot010021, People's Republic of China
| | - Yanling Zhang
- Engineering Research Center of Dairy Quality and Safety Control Technology, Ministry of Education, College of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot010021, People's Republic of China
| | - Alideertu Dong
- Engineering Research Center of Dairy Quality and Safety Control Technology, Ministry of Education, College of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot010021, People's Republic of China
| | - Lei Zhang
- Department of Biochemical Engineering, School of Chemical Engineering and Technology, Frontier Science Center for Synthetic Biology and Key Laboratory of Systems Bioengineering (MOE), Tianjin University, Tianjin300350, People's Republic of China
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8
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Yang F, Song Y, Hui A, Mu B, Wang A. Phyto-Mediated Controllable Synthesis of ZnO Clusters with Bactericidal Activity. ACS APPLIED BIO MATERIALS 2023; 6:277-287. [PMID: 36576779 DOI: 10.1021/acsabm.2c00886] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
The rapid development of antibiotic resistance has been considered a major threat to public health. Nanomaterials have risen to be an effective weapon to tackle this problem through multiple antibacterial mechanisms. The improved and tailored physiochemical properties of fine-tuned secondary nanoarchitectures contribute to the superior bactericidal actions of metal oxide structures. However, it is still challenging to construct secondary structures through mild green manufacturing methods. Here, we report the preferred antibacterial ZnO nanocrystal clusters formed by a green structure-tuning synthesis process, in which the primary ZnO nanoparticles with sizes <10 nm were assembled into different forms of clusters depending on the zinc salt concentration and temperature. ZnO clusters with a stable loose-assembly structure and a rougher surface exhibited better bactericidal ability with minimal inhibitory concentrations of 0.5 and 0.1 mg/mL against Escherichia coli and Staphylococcus aureus, respectively. The underlying mechanism is related to enhancing contact with bacteria, releasing small ZnO nanoparticles, and generating additional reactive oxygen species, which could aggravate the damage to bacterial cell membrane and eventually lead to bacterial death. Furthermore, attachment of phenolic compounds from olive leaf extract would promote membrane penetration by ZnO nanoparticles, resulting in the improvement of antibacterial activities, which profit from the green route mediated by Olea europaea leaf extract that could structure-tune ZnO nanocrystal clusters in one simple step that retains the active ingredients on the nanoparticles. This work proposes a feasible and clean strategy to improve the structure-bioactivity relationship of ZnO by controlling its growth into a preferable structure, and the developed ZnO clusters have a good prospect in antibacterial applications because of their excellent performance and green fabrication method.
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Affiliation(s)
- Fangfang Yang
- Key Laboratory of Clay Mineral Applied Research of Gansu Province, Center of Eco-Material and Green Chemistry, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, P. R. China
| | - Yameng Song
- Key Laboratory of Clay Mineral Applied Research of Gansu Province, Center of Eco-Material and Green Chemistry, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, P. R. China
| | - Aiping Hui
- Key Laboratory of Clay Mineral Applied Research of Gansu Province, Center of Eco-Material and Green Chemistry, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, P. R. China
| | - Bin Mu
- Key Laboratory of Clay Mineral Applied Research of Gansu Province, Center of Eco-Material and Green Chemistry, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, P. R. China.,Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Aiqin Wang
- Key Laboratory of Clay Mineral Applied Research of Gansu Province, Center of Eco-Material and Green Chemistry, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, P. R. China.,Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, P. R. China
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9
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Antibacterial Effects of ZnO Nanodisks: Shape Effect of the Nanostructure on the Lethality in Escherichia coli. Appl Biochem Biotechnol 2022; 195:3067-3095. [PMID: 36520354 DOI: 10.1007/s12010-022-04265-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/08/2022] [Indexed: 12/23/2022]
Abstract
The role of the shape of the nanostructure on the antibacterial effects of ZnO nanodisks has been investigated by detailed mass spectrometry-based proteomics along with other spectroscopic and microscopic studies on E. coli. The primary interaction study of the E. coli cells in the presence of ZnO nanodisks showed rigorous cell surface damage disrupting the cell wall/membrane components detected by microscopic and ATR-FTIR studies. Protein profiling of whole-cell extracts in the presence and absence of ZnO nanodisks identified several proteins that are upregulated and downregulated under the stress of the nanodisks. This suggests that the bacterial response to the primary stress leads to a secondary impact of ZnO nanodisk toxicity via regulation of the expression of specific proteins. Results showed that the ZnO nanodisks lead to the over-expression of peptidyl-dipeptidase Dcp, Transketolase-1, etc., which are important to maintaining the osmotic balance in the cell. The abrupt change in osmotic pressure leads to mechanical injury to the membrane, and nutritional starvation conditions, which is revealed from the expression of the key proteins involved in membrane-protein assembly, maintaining membrane integrity, cell division processes, etc. Thus, indicating a deleterious effect of ZnO nanodisk on the protective layer of E. coli. ZnO nanodisks seem to primarily affect the protective membrane layer, inducing cell death via the development of osmotic shock conditions, as one of the possible reasons for cell death. These results unravel a unique behavior of the disk-shaped ZnO nanostructure in executing lethality in E. coli, which has not been reported for other known shapes or morphologies of ZnO nanoforms.
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Albizia lebbeck-mediated ZnO phytosynthesis and their non-antimicrobial and biocompatibility studies. APPLIED NANOSCIENCE 2022. [DOI: 10.1007/s13204-022-02725-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Ishak MQH, Shankar P, Turabayev ME, Kondo T, Honda M, Gurbatov SO, Okamura Y, Iwamori S, Kulinich SA. Biodegradable Polymer Nanosheets Incorporated with Zn-Containing Nanoparticles for Biomedical Applications. MATERIALS (BASEL, SWITZERLAND) 2022; 15:8101. [PMID: 36431587 PMCID: PMC9694524 DOI: 10.3390/ma15228101] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/19/2022] [Revised: 11/04/2022] [Accepted: 11/08/2022] [Indexed: 06/16/2023]
Abstract
So far, poly(L-lactic acid), PLLA nanosheets proved to be promising for wound healing. Such biodegradable materials are easy to prepare, bio-friendly, cost-effective, simple to apply and were shown to protect burn wounds and facilitate their healing. At the same time, certain metal ions are known to be essential for wound healing, which is why this study was motivated by the idea of incorporating PLLA nanosheets with Zn2+ ion containing nanoparticles. Upon being applied on wound, such polymer nanosheets should release Zn2+ ions, which is expected to improve wound healing. The work thus focused on preparing PLLA nanosheets embedded with several kinds of Zn-containing nanoparticles, their characterization and ion-release behavior. ZnCl2 and ZnO nanoparticles were chosen because of their different solubility in water, with the intention to see the dynamics of their Zn2+ ion release in liquid medium with pH around 7.4. Interestingly, the prepared PLLA nanosheets demonstrated quit similar ion release rates, reaching the maximum concentration after about 10 h. This finding implies that such polymer materials can be promising as they are expected to release ions within several hours after their application on skin.
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Affiliation(s)
- M. Q. Hafzan Ishak
- Department of Mechanical Engineering, Tokai University, Hiratsuka 259-1292, Japan
| | - Prabakaran Shankar
- Department of Mechanical Engineering, Tokai University, Hiratsuka 259-1292, Japan
- Research Institute of Science and Technology, Tokai University, Hiratsuka 259-1292, Japan
| | - Marat E. Turabayev
- Department of Mechanical Engineering, Tokai University, Hiratsuka 259-1292, Japan
| | - Takahiro Kondo
- Department of Mechanical Engineering, Tokai University, Hiratsuka 259-1292, Japan
- Department of Chemistry, Gakushuin University, Toshima-ku, Tokyo 171-0031, Japan
| | - Mitsuhiro Honda
- Department of Mechanical Engineering, Tokai University, Hiratsuka 259-1292, Japan
- Graduate School of Engineering, Nagoya Institute of Technology, Nagoya 466-8555, Japan
| | - Stanislav O. Gurbatov
- Institute of Automation and Control Processes, Far Eastern Branch, Russian Academy of Science, Vladivostok 690041, Russia
- School of Natural Sciences, Far Eastern Federal University, Vladivostok 690091, Russia
| | - Yosuke Okamura
- Department of Applied Chemistry, Tokai University, Hiratsuka 259-1292, Japan
| | - Satoru Iwamori
- Department of Mechanical Engineering, Tokai University, Hiratsuka 259-1292, Japan
- Research Institute of Science and Technology, Tokai University, Hiratsuka 259-1292, Japan
| | - Sergei A. Kulinich
- Department of Mechanical Engineering, Tokai University, Hiratsuka 259-1292, Japan
- Research Institute of Science and Technology, Tokai University, Hiratsuka 259-1292, Japan
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12
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Kang Z, Liu Q, Zhang X, Zhang X, Yang DP, Chen X. Designing waste Bioresource-derived value-added Nanohybrids for efficient photocatalysis water treatment. CHEMOSPHERE 2022; 307:135789. [PMID: 35872059 DOI: 10.1016/j.chemosphere.2022.135789] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/06/2022] [Revised: 07/16/2022] [Accepted: 07/18/2022] [Indexed: 06/15/2023]
Abstract
Although photocatalysis with ultraviolet-visible (UV-vis) light has made considerable advances, it is limited by the low efficiency of UV-vis energy conversion. To overcome this problem, UV-vis light can be replaced with near-infrared (NIR) light. Herein, we coupled eggshell-derived CaCO3 with a NIR-absorbing CuSe semiconductor and fabricated an insulator-based heterojunction structure. In application case studies of 4-nitrophenol (4-NP) and bacteria, the nanocomposites showed enhanced photocatalysis activity under NIR light induction. A first-principles calculation indicated that photoexcited electrons could transfer from the conduction band of CuSe to the conduction band of CaCO3. The main reactive species generated by the photocatalysis were ·CO3-, and ·OH free radicals. The antibacterial mechanisms of photocatalysis on the cell permeability and DNA layers of the bacterial cells were also revealed. Besides providing novel perspectives and mechanistic understanding of the fabrication of NIR light-driven photocatalysts, this study demonstrates the valorization of eggshell bio-wastes in environmental remediation.
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Affiliation(s)
- Zewen Kang
- College of Chemical Engineering and Materials Science, Quanzhou Normal University, Quanzhou 362000, Fujian Province, PR China
| | - Qiaoling Liu
- The Second Affiliated Hospital of Fujian Medical University, Quanzhou, 362400, Fujian Province, PR China
| | - Xiaohui Zhang
- Institute of Molecular Plus, Tianjin University, Tianjin, 300072, Hebei Province, PR China
| | - Xiaoyan Zhang
- College of Chemical Engineering and Materials Science, Quanzhou Normal University, Quanzhou 362000, Fujian Province, PR China
| | - Da-Peng Yang
- College of Chemical Engineering and Materials Science, Quanzhou Normal University, Quanzhou 362000, Fujian Province, PR China.
| | - Xiaofang Chen
- The Second Affiliated Hospital of Fujian Medical University, Quanzhou, 362400, Fujian Province, PR China
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13
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Visible-Light-Driven Antimicrobial Activity and Mechanism of Polydopamine-Reduced Graphene Oxide/BiVO4 Composite. Int J Mol Sci 2022; 23:ijms23147712. [PMID: 35887058 PMCID: PMC9315587 DOI: 10.3390/ijms23147712] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2022] [Revised: 07/05/2022] [Accepted: 07/11/2022] [Indexed: 12/10/2022] Open
Abstract
In this study, a photocatalytic antibacterial composite of polydopamine-reduced graphene oxide (PDA-rGO)/BiVO4 is prepared by a hydrothermal self-polymerization reduction method. Its morphology and physicochemical properties are characterized by scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), Fourier-transform infrared (FT-IR), and X-ray diffraction (XRD). The results indicate that BiVO4 particles are evenly distributed on the rGO surface. Escherichia coli (E. coli) MG1655 is selected as the model bacteria, and its antibacterial performance is tested by flat colony counting and the MTT method under light irradiation. PDA-rGO/BiVO4 inhibits the growth of E. coli under both light and dark conditions, and light significantly enhances the bacteriostasis of PDA-rGO/BiVO4. A combination of BiVO4 with PDA-rGO is confirmed by the above characterization methods as improving the photothermal performance under visible light irradiation. The composite possesses enhanced photocatalytic antibacterial activity. Additionally, the photocatalytic antibacterial mechanism is investigated via the morphology changes in the SEM images of MG1655 bacteria, 2′,7′-dichlorofluorescein diacetate (DCFH-DA), the fluorescence detection of the reactive oxygen species (ROS), and gene expression. These results show that PDA-rGO/BiVO4 can produce more ROS and lead to bacterial death. Subsequently, the q-PCR results show that the transmembrane transport of bacteria is blocked and the respiratory chain is inhibited. This study may provide an important strategy for expanding the application of BiVO4 in biomedicine and studying the photocatalytic antibacterial mechanism.
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14
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Liu R, Ren Y, Wang Y, Zhang C, Wang J, Zhang Y, Wang Y, Yun K, Zhao G. Fabrication of TiO2: Nb array films and their enhanced electrochromic performance. Electrochim Acta 2022. [DOI: 10.1016/j.electacta.2022.140784] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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15
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Wei Y, Wang J, Wu S, Zhou R, Zhang K, Zhang Z, Liu J, Qin S, Shi J. Nanomaterial-Based Zinc Ion Interference Therapy to Combat Bacterial Infections. Front Immunol 2022; 13:899992. [PMID: 35844505 PMCID: PMC9279624 DOI: 10.3389/fimmu.2022.899992] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2022] [Accepted: 05/27/2022] [Indexed: 01/04/2023] Open
Abstract
Pathogenic bacterial infections are the second highest cause of death worldwide and bring severe challenges to public healthcare. Antibiotic resistance makes it urgent to explore new antibacterial therapy. As an essential metal element in both humans and bacteria, zinc ions have various physiological and biochemical functions. They can stabilize the folded conformation of metalloproteins and participate in critical biochemical reactions, including DNA replication, transcription, translation, and signal transduction. Therefore, zinc deficiency would impair bacterial activity and inhibit the growth of bacteria. Interestingly, excess zinc ions also could cause oxidative stress to damage DNA, proteins, and lipids by inhibiting the function of respiratory enzymes to promote the formation of free radicals. Such dual characteristics endow zinc ions with unparalleled advantages in the direction of antibacterial therapy. Based on the fascinating features of zinc ions, nanomaterial-based zinc ion interference therapy emerges relying on the outstanding benefits of nanomaterials. Zinc ion interference therapy is divided into two classes: zinc overloading and zinc deprivation. In this review, we summarized the recent innovative zinc ion interference strategy for the treatment of bacterial infections and focused on analyzing the antibacterial mechanism of zinc overloading and zinc deprivation. Finally, we discuss the current limitations of zinc ion interference antibacterial therapy and put forward problems of clinical translation for zinc ion interference antibacterial therapy.
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Affiliation(s)
- Yongbin Wei
- School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou, China
| | - Jiaming Wang
- School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou, China
| | - Sixuan Wu
- School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou, China
| | - Ruixue Zhou
- School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou, China
| | - Kaixiang Zhang
- School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou, China
- Key Laboratory of Targeting Therapy and Diagnosis for Critical Diseases, Zhengzhou University, Zhengzhou, China
- Key Laboratory of Key Drug Preparation Technology Ministry of Education, Zhengzhou University, Zhengzhou, China
| | - Zhenzhong Zhang
- School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou, China
- Key Laboratory of Targeting Therapy and Diagnosis for Critical Diseases, Zhengzhou University, Zhengzhou, China
- Key Laboratory of Key Drug Preparation Technology Ministry of Education, Zhengzhou University, Zhengzhou, China
| | - Junjie Liu
- School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou, China
- Key Laboratory of Targeting Therapy and Diagnosis for Critical Diseases, Zhengzhou University, Zhengzhou, China
- Key Laboratory of Key Drug Preparation Technology Ministry of Education, Zhengzhou University, Zhengzhou, China
| | - Shangshang Qin
- School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou, China
- Key Laboratory of Targeting Therapy and Diagnosis for Critical Diseases, Zhengzhou University, Zhengzhou, China
- Key Laboratory of Key Drug Preparation Technology Ministry of Education, Zhengzhou University, Zhengzhou, China
| | - Jinjin Shi
- School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou, China
- Key Laboratory of Targeting Therapy and Diagnosis for Critical Diseases, Zhengzhou University, Zhengzhou, China
- Key Laboratory of Key Drug Preparation Technology Ministry of Education, Zhengzhou University, Zhengzhou, China
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16
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Liang X, Dai R, Chang S, Wei Y, Bin Zhang. Antibacterial mechanism of biogenic calcium oxide and antibacterial activity of calcium oxide/polypropylene composites. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2022.129446] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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17
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Gharpure S, Yadwade R, Ankamwar B. Lactuca virosa leaf-mediated biosynthesis of zinc oxide nanoparticles and estimation of antimicrobial and anticancer activities. CHEM LETT 2022. [DOI: 10.1246/cl.220071] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Saee Gharpure
- Bio-Inspired Materials Research Laboratory, Department of Chemistry, Savitribai Phule Pune University (Formerly University of Pune), Ganeshkhind, Pune-411007, India
| | - Rachana Yadwade
- Bio-Inspired Materials Research Laboratory, Department of Chemistry, Savitribai Phule Pune University (Formerly University of Pune), Ganeshkhind, Pune-411007, India
| | - Balaprasad Ankamwar
- Bio-Inspired Materials Research Laboratory, Department of Chemistry, Savitribai Phule Pune University (Formerly University of Pune), Ganeshkhind, Pune-411007, India
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18
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Gong JH, Chen LJ, Zhao X, Yan XP. Persistent Production of Reactive Oxygen Species with Zn 2GeO 4:Cu Nanorod-Loaded Microneedles for Methicillin-Resistant Staphylococcus Aureus Infectious Wound Healing. ACS APPLIED MATERIALS & INTERFACES 2022; 14:17142-17152. [PMID: 35404061 DOI: 10.1021/acsami.2c02503] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Skin wound infection caused by methicillin-resistant Staphylococcus aureus (MRSA) is an urgent concern. Photodynamic therapy has emerged as a promising means of combating bacterial infection. However, continuous or repeated in situ light excitation is required for photosensitizers to produce reactive oxygen species (ROS), and most photosensitizers need sufficient oxygen to produce singlet oxygen (1O2), which greatly limits their clinical application. In this work, we report the preparation of Zn2GeO4:Cu2+ (ZGC) persistent luminescence nanorods with excellent ability for persistent ROS production after stopping excitation for MRSA infectious wound healing. The prepared ZGC nanorods were loaded into dissolvable microneedles (MNs) (ZGC@MNs) to penetrate biofilms and treat MRSA-infected wounds in a minimally invasive manner. ZGC showed a long-persistent photocatalytic effect to constantly produce multiple ROS (1O2, hydroxyl radical, and superoxide radical) accompanied by persistent luminescence after a pre-illumination. The MN tips of ZGC@MNs were rapidly dissolved to release ZGC for the continuous production of multiple ROS for at least 48 h with no need for in situ excitation and no special requirement on the amount of oxygen for eliminating MRSA biofilms. The developed ZGC@MN patches exhibited excellent antibacterial activity and biocompatibility for effectively reducing inflammation and promoting wound healing in vivo.
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Affiliation(s)
- Jia-Hua Gong
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi 214122, China
- International Joint Laboratory on Food Safety, Jiangnan University, Wuxi 214122, China
- Institute of Analytical Food Safety, School of Food Science and Technology, Jiangnan University, Wuxi 214122, China
| | - Li-Jian Chen
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi 214122, China
- International Joint Laboratory on Food Safety, Jiangnan University, Wuxi 214122, China
- Institute of Analytical Food Safety, School of Food Science and Technology, Jiangnan University, Wuxi 214122, China
| | - Xu Zhao
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi 214122, China
- International Joint Laboratory on Food Safety, Jiangnan University, Wuxi 214122, China
- Institute of Analytical Food Safety, School of Food Science and Technology, Jiangnan University, Wuxi 214122, China
| | - Xiu-Ping Yan
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi 214122, China
- International Joint Laboratory on Food Safety, Jiangnan University, Wuxi 214122, China
- Institute of Analytical Food Safety, School of Food Science and Technology, Jiangnan University, Wuxi 214122, China
- Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, China
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19
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Application of Zinc Oxide nanoflowers in Environmental and Biomedical Science. BBA ADVANCES 2022; 2:100051. [PMID: 37082596 PMCID: PMC10074957 DOI: 10.1016/j.bbadva.2022.100051] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2021] [Revised: 11/08/2021] [Accepted: 04/14/2022] [Indexed: 12/16/2022] Open
Abstract
Zinc oxide (ZnO) nanostructures can be synthesized in nanoforms of spheres, rods, flowers, disks, walls, etc., among which nanoflowers have gained special attention due to their versatile biomedical and pollutant remedial applications in waste water and air. ZnO nanoflowers have an ultrasmall size with a huge surface area to volume ratio due to their hexagonal petal structures which render them superior compared to the nanoparticles of other shapes. The ZnO nanoflowers have bandgap energy equivalent to a semiconductor that makes them have unique photophysical properties. We have used the appropriate keywords in Google Scholar and PubMed to obtain the recent publications related to our topic. We have selected the relevant papers and utilized them to write this review. The different methods of synthesis of ZnO nanoflowers are chemical vapor deposition, facile hydrothermal, thermal evaporation, chemical reduction, bio route of synthesis, and solvothermal method, etc. which are mentioned in this review. ZnO nanoparticles are used in paints, cosmetics, and other products due to their high photocatalytic activity. The different applications of ZnO nanoflowers in the diagnosis of disease biomarkers, biosensors, catalysts, and the therapeutic process along with wastewater remediation and gas sensing applications will be discussed in this review.
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20
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Kang S, Park DH, Hwang J. Hierarchical ZnO nano-spines grown on a carbon fiber seed layer for efficient VOC removal and airborne virus and bacteria inactivation. JOURNAL OF HAZARDOUS MATERIALS 2022; 424:127262. [PMID: 34583159 DOI: 10.1016/j.jhazmat.2021.127262] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/06/2021] [Revised: 09/14/2021] [Accepted: 09/14/2021] [Indexed: 06/13/2023]
Abstract
Air purification through fiber-based filters has become a fundamental requirement for air contamination control. However, conventional filters depend on polymeric fibrous filters with adequate particulate matter removal ability but fewer degassing and biocidal effects. This study presents the photocatalytic volatile organic compound (VOC) oxidation and antimicrobial properties of zinc oxide (ZnO) nano-spines sprouted activated-carbon nanofibers (I@ZnO/ACNFs) and their potential for air contamination control and infection prevention. By developing a novel technique that can induce phase separation of inorganic salts during electrospinning, nanofibers with zinc (Zn) components concentrated on the surface could be synthesized. I@ZnO/ACNFs exhibit a surface densely covered with high aspect-ratio ZnO nano-spines with significant lethality to airborne pathogens and enhanced photocatalytic activity toward VOCs. Moreover, excellent adhesion stability of ZnO to ACNFs under rapid airflow was observed in I@ZnO/ACNFs. In combination with intriguing antimicrobial activity and strong VOC removal capability derived from their unique morphology, novel I@ZnO/ACNFs hold potential for airborne microbial disinfection, effective and sustainable VOC purification, and the design of photomicrobicidal and photocatalytic materials.
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Affiliation(s)
- Sangmo Kang
- School of Mechanical Engineering, Yonsei University, Seoul 03722, Republic of Korea.
| | - Dae Hoon Park
- Korean Institute of Machinery and Materials (KIMM), Department of Environmental Machinery, Daejeon 34103, Republic of Korea.
| | - Jungho Hwang
- School of Mechanical Engineering, Yonsei University, Seoul 03722, Republic of Korea.
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21
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Pino P, Ronchetti S, Mollea C, Sangermano M, Onida B, Bosco F. Whey Proteins-Zinc Oxide Bionanocomposite as Antibacterial Films. Pharmaceutics 2021; 13:1426. [PMID: 34575502 PMCID: PMC8466345 DOI: 10.3390/pharmaceutics13091426] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2021] [Revised: 08/26/2021] [Accepted: 09/02/2021] [Indexed: 11/23/2022] Open
Abstract
The use of toxic crosslinking agents and reagents in the fabrication of hydrogels is a frequent issue which is particularly concerning for biomedical or food packaging applications. In this study, novel antibacterial bionanocomposite films were obtained through a simple solvent casting technique without using any crosslinking substance. Films were made from a flexible and transparent whey protein matrix containing zinc oxide nanoparticles synthesised via a wet chemical precipitation route. The physicochemical and functional properties of the ZnO nanoparticles and of the composite films were characterised, and their antibacterial activity was tested against S. epidermidis and E. coli. The synthesised ZnO nanoparticles had an average size of about 30 nm and a specific surface area of 49.5 m2/g. The swelling ratio of the bionanocomposite films increased at basic pH, which is an appealing feature in relation to the absorption of chronic wound exudate. A n-ZnO concentration-dependent antibacterial effect was observed for composite films. In particular, marked antibacterial activity was observed against S. epidermidis. Overall, these findings suggest that this novel material can be a promising and sustainable alternative in the design of advanced solutions for wound dressing or food packaging.
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Affiliation(s)
| | | | | | | | - Barbara Onida
- Department of Applied Science and Technology, Politecnico di Torino, 10129 Turin, Italy; (P.P.); (S.R.); (C.M.); (M.S.); (F.B.)
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22
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Donnadio A, Roscini L, Di Michele A, Corazzini V, Cardinali G, Ambrogi V. PVC grafted zinc oxide nanoparticles as an inhospitable surface to microbes. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2021; 128:112290. [PMID: 34474841 DOI: 10.1016/j.msec.2021.112290] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/16/2021] [Revised: 06/25/2021] [Accepted: 06/28/2021] [Indexed: 11/27/2022]
Abstract
Antimicrobial Polyvinyl chloride (PVC) was obtained by covalent bonding of zinc oxide nanoparticles, which have gained important achievements in antimicrobial fields because of their auspicious properties. This was achieved by grafting mercaptopropyltrimethoxysilane onto PVC, followed by the growth of zinc oxide nanoparticles covalently bonded on the polymer surface. In this study, the relationship between the physicochemical features of modified-surface PVC and antimicrobial activity on Staphylococcus aureus and Candida albicans was investigated. Zinc oxide with controllable morphologies (rods, rod flowers, and petal flowers) was synthesized on the polymer surface by tuning merely base-type and concentration using a hydrothermal process. The antimicrobial activity was more pronounced for rod flower morphology, because of their differences in microscopic parameters such as specific Zn-polar planes. This work provides an important hint for the safe use of PVC for biomedical devices by the structure surface tuning without injuring polymer bulk properties and a reduced risk of the covalently bonded nanoparticle dispersion in the host and the environment.
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Affiliation(s)
- Anna Donnadio
- Department of Pharmaceutical Sciences, University of Perugia, via del Liceo 1, 06123 Perugia, Italy; Centro di Eccellenza CEMIN - Materiali Innovativi Nanostrutturali per applicazioni Chimica Fisiche e Biomediche, University of Perugia, via Elce di Sotto 8, 06123 Perugia, Italy.
| | - Luca Roscini
- Department of Pharmaceutical Sciences, University of Perugia, Borgo XX giugno, 06121 Perugia, Italy
| | - Alessandro Di Michele
- Department of Physics and Geology, University of Perugia, Via A. Pascoli, 06123 Perugia, Italy
| | - Valentina Corazzini
- Department of Pharmaceutical Sciences, University of Perugia, via del Liceo 1, 06123 Perugia, Italy
| | - Gianluigi Cardinali
- Department of Pharmaceutical Sciences, University of Perugia, Borgo XX giugno, 06121 Perugia, Italy; Centro di Eccellenza CEMIN - Materiali Innovativi Nanostrutturali per applicazioni Chimica Fisiche e Biomediche, University of Perugia, via Elce di Sotto 8, 06123 Perugia, Italy
| | - Valeria Ambrogi
- Department of Pharmaceutical Sciences, University of Perugia, via del Liceo 1, 06123 Perugia, Italy
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23
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Mao Q, Jing W, Gao W, Wei Z, Tian B, Liu M, Ren W, Jiang Z. High-Sensitivity Enzymatic Glucose Sensor Based on ZnO Urchin-like Nanostructure Modified with Fe 3O 4 Magnetic Particles. MICROMACHINES 2021; 12:mi12080977. [PMID: 34442599 PMCID: PMC8398963 DOI: 10.3390/mi12080977] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/12/2021] [Revised: 08/11/2021] [Accepted: 08/16/2021] [Indexed: 11/16/2022]
Abstract
A novel and efficient enzymatic glucose sensor was fabricated based on Fe3O4 magnetic nanoparticles (Fe3O4MNPs)-modified urchin-like ZnO nanoflowers (ZnONFs). ZnONFs were hydrothermally synthesizing on a flexible PET substrate. Fe3O4MNPs were deposited on the surface of the ZnONFs by the drop-coating process. The results showed that the urchin-like ZnONFs provided strong support for enzyme adsorption. For Fe3O4MNPs, it significantly promoted the redox electron transfer from the active center of GOx to the ZnO nanoflowers beneath. More importantly, it promoted the hydrolysis of H2O2, the intermediate product of glucose catalytic reaction, and thus improved the electron yield. The sensitivity of the Nafion/GOx/Fe3O4MNPs/ZnONFs/Au/PET sensor was up to 4.52 μA·mM-1·cm-2, which was improved by 7.93 times more than the Nafion/GOx/ZnONFs/Au/PET sensors (0.57 μA·mM-1·cm-2). The detection limit and linear range were also improved. Additionally, the as-fabricated glucose sensors show strong anti-interference performance in the test environment containing organic compounds (such as urea, uric acid, and ascorbic acid) and inorganic salt (for instance, NaCl and KCl). The glucose sensor's service life was evaluated, and it can still maintain about 80% detection performance when it was reused about 20 times. Compared with other existing sensors, the as-fabricated glucose sensor exhibits an ultrahigh sensitivity and wide detection range. In addition, the introduction of Fe3O4MNPs optimized the catalytic efficiency from the perspective of the reaction mechanism and provided potential ideas for improving the performance of other enzymatic biosensors.
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Affiliation(s)
- Qi Mao
- State Key Laboratory for Manufacturing Systems Engineering, International Joint Laboratory for Micro/Nano Manufacturing and Measurement Technology, Xi’an Jiaotong University, Xi’an 710049, China; (Q.M.); (W.G.); (Z.W.); (B.T.); (Z.J.)
| | - Weixuan Jing
- State Key Laboratory for Manufacturing Systems Engineering, International Joint Laboratory for Micro/Nano Manufacturing and Measurement Technology, Xi’an Jiaotong University, Xi’an 710049, China; (Q.M.); (W.G.); (Z.W.); (B.T.); (Z.J.)
- Correspondence: ; Tel.: +86-029-82668616
| | - Weizhuo Gao
- State Key Laboratory for Manufacturing Systems Engineering, International Joint Laboratory for Micro/Nano Manufacturing and Measurement Technology, Xi’an Jiaotong University, Xi’an 710049, China; (Q.M.); (W.G.); (Z.W.); (B.T.); (Z.J.)
| | - Zhengying Wei
- State Key Laboratory for Manufacturing Systems Engineering, International Joint Laboratory for Micro/Nano Manufacturing and Measurement Technology, Xi’an Jiaotong University, Xi’an 710049, China; (Q.M.); (W.G.); (Z.W.); (B.T.); (Z.J.)
| | - Bian Tian
- State Key Laboratory for Manufacturing Systems Engineering, International Joint Laboratory for Micro/Nano Manufacturing and Measurement Technology, Xi’an Jiaotong University, Xi’an 710049, China; (Q.M.); (W.G.); (Z.W.); (B.T.); (Z.J.)
| | - Ming Liu
- Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education & International Center for Dielectric Research, State Key Laboratory for Mechanical Behavior of Materials, School of Electronic Science and Engineering, Xi’an Jiaotong University, Xi’an 710049, China; (M.L.); (W.R.)
| | - Wei Ren
- Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education & International Center for Dielectric Research, State Key Laboratory for Mechanical Behavior of Materials, School of Electronic Science and Engineering, Xi’an Jiaotong University, Xi’an 710049, China; (M.L.); (W.R.)
| | - Zhuangde Jiang
- State Key Laboratory for Manufacturing Systems Engineering, International Joint Laboratory for Micro/Nano Manufacturing and Measurement Technology, Xi’an Jiaotong University, Xi’an 710049, China; (Q.M.); (W.G.); (Z.W.); (B.T.); (Z.J.)
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24
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Li H, Chen X, Lu W, Wang J, Xu Y, Guo Y. Application of Electrospinning in Antibacterial Field. NANOMATERIALS (BASEL, SWITZERLAND) 2021; 11:1822. [PMID: 34361208 PMCID: PMC8308247 DOI: 10.3390/nano11071822] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/07/2021] [Revised: 06/07/2021] [Accepted: 06/08/2021] [Indexed: 02/06/2023]
Abstract
In recent years, electrospun nanofibers have attracted extensive attention due to their large specific surface area, high porosity, and controllable shape. Among the many applications of electrospinning, electrospun nanofibers used in fields such as tissue engineering, food packaging, and air purification often require some antibacterial properties. This paper expounds the development potential of electrospinning in the antibacterial field from four aspects: fiber morphology, antibacterial materials, antibacterial mechanism, and application fields. The effects of fiber morphology and antibacterial materials on the antibacterial activity and characteristics are first presented, then followed by a discussion of the antibacterial mechanisms and influencing factors of these materials. Typical application examples of antibacterial nanofibers are presented, which show the good prospects of electrospinning in the antibacterial field.
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Affiliation(s)
- Honghai Li
- Key Laboratory of Photochemical Conversion and Optoelectronic Material, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China; (H.L.); (X.C.)
- School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Xin Chen
- Key Laboratory of Photochemical Conversion and Optoelectronic Material, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China; (H.L.); (X.C.)
- School of Future Technology, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Weipeng Lu
- Key Laboratory of Photochemical Conversion and Optoelectronic Material, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China; (H.L.); (X.C.)
| | - Jie Wang
- School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Yisheng Xu
- School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Yanchuan Guo
- School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
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25
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Microscale ZnO with controllable crystal morphology as a platform to study antibacterial action on Staphylococcus aureus. Biointerphases 2021; 16:031003. [PMID: 34241188 DOI: 10.1116/6.0000957] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Nano- and microcrystalline ZnO is an inexpensive, easily synthesized material with a multitude of applications. Its usefulness in the present and future stems from its exceptional optoelectronic, structural, and chemical characteristics as well as a broad range of production techniques. One application comes from its ability to inhibit bacterial growth. Despite the well-documented, vigorously studied antimicrobial action of ZnO particles, the most fundamental physical and chemical mechanisms driving growth inhibition are still not well identified. Particularly, the nature of interactions between ZnO surfaces and extracellular material is not totally clear. This is important given the anisotropic lattice of ZnO leading to two characteristically different lattice terminations: polar and nonpolar, polar being electrically charged with many defect sites and nonpolar being electrically neutral while remaining relatively defect-free. In this work, we employ a hydrothermal growth protocol that allows us to produce ZnO microcrystals with dependable control of morphology and, particularly, the relative abundances of polar and nonpolar free surfaces. This functions as a platform for our investigations into surface-surface interactions behind the antibacterial action of ZnO microcrystals. In our studies, we produced ZnO crystals comparable in size or larger than Staphylococcus aureus bacteria. This was done intentionally to ensure that the ZnO particles would not internalize into the bacterial cells. Our experiments were performed in conjunction with surface photovoltage studies of ZnO crystals to characterize electronic structure and charge dynamics that might be contributing to the antibacterial properties of our samples. We report on the interactions between ZnO microcrystalline surfaces and extracellular material of Staphylococcus aureus bacteria.
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Li Z, Wang J, Shen R, Chen N, Qin X, Wang W, Yuan Q. Topological Radiated Dendrites Featuring Persistent Bactericidal Activity for Daily Personal Protection. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2021; 17:e2100562. [PMID: 33969623 DOI: 10.1002/smll.202100562] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/28/2021] [Revised: 03/09/2021] [Indexed: 06/12/2023]
Abstract
Many substances in nature show radiated topological structure and possess excellent bio-adhesion ability. Herein, regulating the topological structure of Zn2 GeO4 :Mn persistent phosphors is achieved with a molecular coordination method. The morphology of the Zn2 GeO4 :Mn phosphors is well-tuned from nanorods to radiated dendrites by changing the coordination capability of the surface ligand. Due to the structural matching and multivalent interactions, Zn2 GeO4 :Mn radiated dendrites show strong adhesion affinity toward organisms. Moreover, the porous radiated structure offers Zn2 GeO4 :Mn with a large surface area for photocatalysis. Efficient bacterial adhesion and good long persistent photocatalysis activity are observed in the Zn2 GeO4 :Mn radiated dendrites, which endows Zn2 GeO4 :Mn with persistent antibacterial activity even in the dark. Further, the Zn2 GeO4 :Mn spike flowers loaded fabrics exhibit potent persistent antibacterial properties. Mask and towel fabricated with the antibacterial fabrics can inhibit bacterial growth effectively and no bacteria are observed to pass through the antibacterial mask, suggesting that antibacterial mask can guarantee our health and can be utilized repeatedly. The developed Zn2 GeO4 :Mn dendrites possess ideal ability in long-term bacterial inhibition, making them valuable in the fields of medical protection and food packaging.
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Affiliation(s)
- Zhiheng Li
- Key Laboratory of Biomedical Polymers of Ministry of Education, College of Chemistry and Molecular Sciences, School of Microelectronics, Wuhan University, Wuhan, 430072, China
| | - Jie Wang
- Key Laboratory of Biomedical Polymers of Ministry of Education, College of Chemistry and Molecular Sciences, School of Microelectronics, Wuhan University, Wuhan, 430072, China
| | - Ruichen Shen
- Institute of Chemical Biology and Nanomedicine, State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, China
| | - Na Chen
- Key Laboratory of Biomedical Polymers of Ministry of Education, College of Chemistry and Molecular Sciences, School of Microelectronics, Wuhan University, Wuhan, 430072, China
| | - Xinyuan Qin
- Key Laboratory of Biomedical Polymers of Ministry of Education, College of Chemistry and Molecular Sciences, School of Microelectronics, Wuhan University, Wuhan, 430072, China
| | - Wenjie Wang
- Institute of Chemical Biology and Nanomedicine, State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, China
| | - Quan Yuan
- Key Laboratory of Biomedical Polymers of Ministry of Education, College of Chemistry and Molecular Sciences, School of Microelectronics, Wuhan University, Wuhan, 430072, China
- Institute of Chemical Biology and Nanomedicine, State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, China
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Rutherford D, Jíra J, Kolářová K, Matolínová I, Mičová J, Remeš Z, Rezek B. Growth Inhibition of Gram-Positive and Gram-Negative Bacteria by Zinc Oxide Hedgehog Particles. Int J Nanomedicine 2021; 16:3541-3554. [PMID: 34079247 PMCID: PMC8163618 DOI: 10.2147/ijn.s300428] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2021] [Accepted: 04/07/2021] [Indexed: 12/11/2022] Open
Abstract
PURPOSE Nanomaterials for antimicrobial applications have gained interest in recent years due to the increasing bacteria resistance to conventional antibiotics. Wound sterilization, water treatment and surface decontamination all avail from multifunctional materials that also possess excellent antibacterial properties, eg zinc oxide (ZnO). Here, we assess and compare the effects of synthesized hedgehog-like ZnO structures and commercial ZnO particles with and without mixing on the inactivation of bacteria on surfaces and in liquid environments. METHODS Gram-positive (Staphylococcus aureus) and Gram-negative (Escherichia coli) bacteria in microbial culture medium were added to reverse spin bioreactors that contained different concentrations of each ZnO type to enable dynamic mixing of the bacteria-ZnO suspensions. Optical density of the bacteria-ZnO suspensions was measured in real-time and the number of viable bacteria after 24 h exposure was determined using standard microbiological techniques. The concentration of zinc ion generated from ZnO dissolution in different liquid types was estimated from the dynamic interaction exposure. Static antibacterial tests without agitation in liquid media and on agar surface were performed for comparison. RESULTS A correlation between increasing ZnO particle concentration and reduction in viable bacteria was not monotonous. The lowest concentration tested (10 µg/mL) even stimulated bacteria growth. The hedgehog ZnO was significantly more antibacterial than commercial ZnO particles at higher concentrations (up to 1000 µg/mL tested), more against E. coli than S. aureus. Minimum inhibitory concentration in microwell plates was correlated with those results. No inhibition was detected for any ZnO type deposited on agar surface. Zinc ion release was greatly suppressed in cultivation media. Scanning electron microscopy images revealed that ZnO needles can pierce membrane of bacteria whereas the commercial ZnO nanoparticles rather agglomerate on the cell surface. CONCLUSION The inhibition effects are thus mainly controlled by the interaction dynamics between bacteria and ZnO, where mixing greatly enhances antibacterial efficacy of all ZnO particles. The efficacy is modulated also by ZnO particle shapes, where hedgehog ZnO has superior effect, in particular at lower concentrations. However, at too low concentrations, ZnO can stimulate bacteria growth and must be thus used with caution.
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Affiliation(s)
- David Rutherford
- Faculty of Electrical Engineering, Czech Technical University, Prague, Czech Republic
| | - Jaroslav Jíra
- Faculty of Electrical Engineering, Czech Technical University, Prague, Czech Republic
| | - Kateřina Kolářová
- Author Affiliations Institute of Physics, Czech Academy of Sciences, Prague, Czech Republic
| | - Iva Matolínová
- Faculty of Mathematics and Physics, Charles University, Prague, Czech Republic
| | - Júlia Mičová
- Institute of Chemistry, Slovak Academy of Sciences, Bratislava, Slovak Republic
| | - Zdenek Remeš
- Author Affiliations Institute of Physics, Czech Academy of Sciences, Prague, Czech Republic
| | - Bohuslav Rezek
- Faculty of Electrical Engineering, Czech Technical University, Prague, Czech Republic
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Antimicrobial effects in oral microenvironments by a novel herbal toothpaste. Contemp Clin Trials Commun 2021; 21:100680. [PMID: 33511298 PMCID: PMC7815994 DOI: 10.1016/j.conctc.2020.100680] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2020] [Revised: 11/07/2020] [Accepted: 11/22/2020] [Indexed: 11/22/2022] Open
Abstract
Objective This clinical study compared the antibacterial effects after brushing with a novel herbal toothpaste incorporating zinc [test] to a control fluoride toothpaste on anaerobic organisms, gram-negative bacteria and malodor bacteria of dental plaque, tongue scrapings and cheek surfaces. Methods This double-blind, two-cell study enrolled 44 adults [age range 19–63 years]. Subjects completed a 1-week washout and provided baseline oral samples i.e. dental plaque, tongue and cheek scrapings for microbiological analysis. Diluted samples for microbiological analyses were plated on agar to enumerate anaerobic organisms, gram-negative bacteria and malodor bacteria representing functional groups of organisms. Subjects were randomized to brush their teeth with either the test or control with the first brushing conducted under supervision in the dental clinic. Post-treatment samples were collected 12 h after 21 day hygiene with assigned toothpaste. After providing these samples, subjects brushed in the dental clinic with additional samples collected 4 h after brushing. Statistical analyses were conducted separately for each organism collected from each oral niche by t-test for within-treatment assessments and analysis of covariance (ANCOVA) for between-treatment comparisons. Results Treatment groups demonstrated no significant differences at baseline for anaerobic organisms, gram-negative bacteria and malodor bacteria in any oral niche (p > 0.05). The test demonstrated reductions between 42 and 68% for anaerobic bacteria in oral niches, 12 h after brushing with reductions increasing to 46–80%, 4 h after brushing. Similarly, the test demonstrated reductions between 49 and 61% for gram-negative bacteria of oral niches that increased to 54–69% at the 4 h post-brushing evaluation. Reductions in malodor organisms of 22–42% were noted 12 h after brushing that increased to 60–72%, 4 h after brushing. Conclusions In comparison to control, brushing with a novel herbal toothpaste demonstrated significant reductions in functional bacterial groups from distinct oral niches 12 h after brushing with additional microbial reductions 4 h after brushing.
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Precise magnetic resonance imaging-guided sonodynamic therapy for drug-resistant bacterial deep infection. Biomaterials 2020; 264:120386. [PMID: 32979656 DOI: 10.1016/j.biomaterials.2020.120386] [Citation(s) in RCA: 58] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2020] [Revised: 09/04/2020] [Accepted: 09/14/2020] [Indexed: 12/13/2022]
Abstract
The precise treatment of drug-resistant deep bacterial infections remains a huge challenge in clinic. Herein, a polymer-peptide-porphyrin conjugate (PPPC), which can be real-time monitored in infectious site, is developed for accurate and deep sonodynamic therapy (SDT) based on "in vivo self-assembly" strategy. The PPPC contains four moieties, i.e., a hyperbranched polymer backbone, a self-assembled peptide linked with an enzyme-cleavable peptide-poly (ethylene glycol) terminal, a bacterial targeting peptide, and a porphyrin sonosensitizer (MnTCPP) segment. Once PPPC nanoparticles reach the infectious area, the protecting PEG layers are removed due to the over-expressed gelatinase, leading to the secondary assembly into large nanoaggregates and resultant enhanced accumulation of sonosensitizer. The nanoaggregates exhibit enhanced interaction with bacterial membrane and decrease the minimum inhibitory concentration (MIC) significantly. Meanwhile, compared with free MnTCPP, the concentration of which can not be accurately quantified, the accumulation amount of MnTCPP in PPPCs at infectious site can be in situ monitored by magnetic resonance imaging (MRI) using T1 combined with T2. When the concentration of PPPC-1 reaches MIC, the drug-resistant bacterial infection area is exposed to ultrasound irradiation, causing the precise and efficient elimination of bacteria. Therefore, the MRI-guided SDT system shows extraordinary tissue penetration depth, drug concentration monitoring, morphology-transformation induced accumulation and improved treatment capacity toward drug-resistant bacteria.
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Khan FU, Khan ZUH, Ma J, Khan AU, Sohail M, Chen Y, Yang Y, Pan X. An Astragalus membranaceus based eco-friendly biomimetic synthesis approach of ZnO nanoflowers with an excellent antibacterial, antioxidant and electrochemical sensing effect. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2020; 118:111432. [PMID: 33255026 DOI: 10.1016/j.msec.2020.111432] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/21/2020] [Revised: 08/07/2020] [Accepted: 08/20/2020] [Indexed: 12/18/2022]
Abstract
Nowadays featuring outstanding eco-friendliness, the phytochemical fabrication method of nanostructures is very popular. Here, we propose to utilize the Astragalus membranaceus extract as the reducing and capping agent to stabilize the metal and to avoid the aggregations of nanoparticles during ZnO nanoflowers synthesis procedure. As a result, the whole fabrication procedure was highly efficient and cost-effective without requiring a special environment of high pressure or elevated temperature and without chemical hazards used or produced. After the fabrication, detailed characterization about material morphology and crystal structure was carried out, including scanning electron microscopy (SEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and Fourier transform infrared spectroscope (FTIR). Moreover, the ZnO nanoflowers demonstrated distinctive antibacterial, antioxidant and electrochemical sensing effect. Specifically, ZnO nanoflowers had an antibacterial inhibition zone of 19(±0.7) and 15(±0.8) mm in diameter against the concentration of 50 μL (1 mg/mL) Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus), which is greatly improved compared to the reference drug (Kanamycin). Besides, antioxidant activity was also tested using H2O2 free radical scavenging assay and 60% 2,2-diphenyl-1-picrylhydrazyl (DPPH) inhibition of 0.5 mg/mL was reported. Finally, controlled by the diffusion process during the charge transfer procedure, 4-nitorphenol was dramatically reduced and a limit of detection of 0.08 μM by ZnO nanoflowers modified electrode was observed during the cyclic voltammetry (CV) experiment. Because the phenolic compounds originating from Astragalus membranaceus helped to facilitate the electron transfer, the limit of detection was lower compared to other materials, such as copper oxide nanoparticles (Cu2O-NPs), silicon dioxide/silver nanoparticles (SiO2/Ag-NPs), zinc oxide nanoparticles (ZnO-NPs), activated carbon (AC) and cobalt oxide nanocubes (Co3O4). Therefore, featuring easy operation, low-cost and eco-friendliness, our proposed ZnO nanoflowers fabrication method will have a great potential in biomedical and electro-catalytic fields.
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Affiliation(s)
- Faheem Ullah Khan
- College of Electronics and Information Engineering, Shenzhen University, Guangdong Province 518000, China
| | - Zia Ul Haq Khan
- Department of Environmental Sciences, COMSATS University Islamabad, Vehari Campus,61100, Pakistan
| | - Junxian Ma
- College of Electronics and Information Engineering, Shenzhen University, Guangdong Province 518000, China
| | - Arif Ullah Khan
- Beijing Advanced Innovation Center for Soft Matter Science & Engineering, Beijing University of Chemical Technology, Beijing 100029, PR China
| | - Muhammad Sohail
- Institute for Advanced Study, Shenzhen University, Shenzhen 518060, PR China
| | - Yongmei Chen
- National Fundamental Research Laboratory of New Hazardous Chemicals Assessment & Accident Analysis, Institute of Applied Electrochemistry, Beijing University of Chemical Technology, Beijing 100029, PR China
| | - Yatao Yang
- College of Electronics and Information Engineering, Shenzhen University, Guangdong Province 518000, China.
| | - Xiaofang Pan
- College of Electronics and Information Engineering, Shenzhen University, Guangdong Province 518000, China.
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Gupta A, Mishra V, Srivastava R. Zinc oxide nanoparticles decorated fluorescent and antibacterial glass fiber pre-filter paper. NANO EXPRESS 2020. [DOI: 10.1088/2632-959x/ab976d] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Abstract
Zinc oxide nanoparticles (ZnO–NPs) were synthesized and decorated simultaneously onto the glass fiber pre-filter paper (GF paper) by the sonochemical method without using any additional reagents (a ‘Green’ synthesis approach). ZnO–NPs decorated GF paper was characterized by electron, confocal laser scanning and atomic force microscopy, fourier transform infrared and atomic emission spectroscopy, X-ray diffraction, and thermogravimetric analysis etc. Due to the massive void volume space, exceptional dimensional stability, large thickness (790 μm) of the GF paper (unlike other paper materials) and ultrasonic irradiation effects, ZnO–NPs were decorated in the enormous amount (96 mg per paper) without causing any adverse effects on the GF paper. Such a huge amount decoration onto GF paper makes it multifunctional, fluorescencet (orange-pink color, 535–624 nm) under ultra-violet light (360 nm) and antibacterial. The antibacterial activity of the ZnO–NPs decorated GF paper was examined against Gram-positive bacteria Bacillus subtilis 168 and Staphylococcus aureus (MCC 2043, pathogenic). The outcomes from the antibacterial experiments revealed ∼99% (2 log) reduction in the survival of the filtered bacteria (B. subtilis) on the ZnO–NPs decorated GF paper due to the toxicity of ZnO–NPs on bacterial cells like cell shrinkage, cytoplasmic leakage, cell burst, etc. Multifunctional, ZnO–NPs decorated GF paper could be used for fluorescencet and antibacterial paper-based applications.
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Smerkova K, Dolezelikova K, Bozdechova L, Heger Z, Zurek L, Adam V. Nanomaterials with active targeting as advanced antimicrobials. WILEY INTERDISCIPLINARY REVIEWS-NANOMEDICINE AND NANOBIOTECHNOLOGY 2020; 12:e1636. [PMID: 32363802 DOI: 10.1002/wnan.1636] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/2019] [Revised: 03/30/2020] [Accepted: 03/31/2020] [Indexed: 12/19/2022]
Abstract
With a growing health threat of bacterial resistance to antibiotics, the nanomaterials have been extensively studied as an alternative. It is assumed that antimicrobial nanomaterials can affect bacteria by several mechanisms simultaneously and thereby overcome antibiotic resistance. Another promising potential use is employing nanomaterials as nanocarriers for antibiotics in order to overcome bacterial defense mechanisms. The passive targeting of nanomaterials is the often used strategy for bacterial treatment, including intracellular infections of macrophages. Furthermore, the specific targeting enhances the efficacy of antimicrobials and reduces side effects. This review aims to discuss advantages, disadvantages, and challenges of nanomaterials in the context of the targeting strategies for antimicrobials as advanced tools for treatments of bacterial infections. This article is categorized under: Therapeutic Approaches and Drug Discovery > Nanomedicine for Infectious Disease.
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Affiliation(s)
- Kristyna Smerkova
- Department of Chemistry and Biochemistry, Mendel University in Brno, Brno, Czech Republic.,Central European Institute of Technology, Brno University of Technology, Brno, Czech Republic
| | - Kristyna Dolezelikova
- Department of Chemistry and Biochemistry, Mendel University in Brno, Brno, Czech Republic.,Central European Institute of Technology, Brno University of Technology, Brno, Czech Republic
| | - Lucie Bozdechova
- Department of Chemistry and Biochemistry, Mendel University in Brno, Brno, Czech Republic.,Central European Institute of Technology, Brno University of Technology, Brno, Czech Republic
| | - Zbynek Heger
- Department of Chemistry and Biochemistry, Mendel University in Brno, Brno, Czech Republic.,Central European Institute of Technology, Brno University of Technology, Brno, Czech Republic
| | - Ludek Zurek
- Department of Chemistry and Biochemistry, Mendel University in Brno, Brno, Czech Republic.,Central European Institute of Technology, Center for Zoonoses, University of Veterinary and Pharmaceutical Sciences, Brno, Czech Republic
| | - Vojtech Adam
- Department of Chemistry and Biochemistry, Mendel University in Brno, Brno, Czech Republic.,Central European Institute of Technology, Brno University of Technology, Brno, Czech Republic
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K.S. J, Jose J, Li T, Thomas M, Shankregowda AM, Sreekumaran S, Kalarikkal N, Thomas S. Application of novel zinc oxide reinforced xanthan gum hybrid system for edible coatings. Int J Biol Macromol 2020; 151:806-813. [DOI: 10.1016/j.ijbiomac.2020.02.085] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2019] [Revised: 01/31/2020] [Accepted: 02/08/2020] [Indexed: 10/25/2022]
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Ye Q, Chen W, Huang H, Tang Y, Wang W, Meng F, Wang H, Zheng Y. Iron and zinc ions, potent weapons against multidrug-resistant bacteria. Appl Microbiol Biotechnol 2020; 104:5213-5227. [PMID: 32303820 DOI: 10.1007/s00253-020-10600-4] [Citation(s) in RCA: 41] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2019] [Revised: 02/27/2020] [Accepted: 03/31/2020] [Indexed: 12/11/2022]
Abstract
Drug-resistant bacteria are becoming an increasingly widespread problem in the clinical setting. The current pipeline of antibiotics cannot provide satisfactory options for clinicians, which brought increasing attention to the development and application of non-traditional antimicrobial substances as alternatives. Metal ions, such as iron and zinc ions, have been widely applied to inhibit pathogens through different mechanisms, including synergistic action with different metabolic enzymes, regulation of efflux pumps, and inhibition of biofilm formation. Compared with traditional metal oxide nanoparticles, iron oxide nanoparticles (IONPs) and zinc oxide nanoparticles (ZnO-NPs) display stronger bactericidal effect because of their smaller ion particle sizes and higher surface energies. The combined utilization of metal NPs (nanoparticles) and antibiotics paves a new way to enhance antimicrobial efficacy and reduce the incidence of drug resistance. In this review, we summarize the physiological roles and bactericidal mechanisms of iron and zinc ions, present the recent progress in the research on the joint use of metal NPs with different antibiotics, and highlight the promising prospects of metal NPs as antimicrobial agents for tackling multidrug-resistant bacteria.
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Affiliation(s)
- Qian Ye
- College of Biotechnology and pharmaceutical Engineering, Nanjing Tech University, Nanjing, 211806, China.,Intensive Care Unit, The Second Hospital of Nanjing, Nanjing University of Chinese Medicine, Nanjing, 210003, China
| | - Wei Chen
- Clinical Research Center, The Second Hospital of Nanjing, Nanjing University of Chinese Medicine, Nanjing, 210003, China
| | - He Huang
- School of Pharmaceutical Sciences, Nanjing Tech University, Nanjing, 211816, China.,Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing, 211816, China.,State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University, Nanjing, 210009, China.,School of Food Science and Pharmaceutical Engineering, Nanjing Normal University, Nanjing, 210023, China
| | - Yuqing Tang
- School of Pharmaceutical Sciences, Nanjing Tech University, Nanjing, 211816, China
| | - Weixiao Wang
- Clinical Research Center, The Second Hospital of Nanjing, Nanjing University of Chinese Medicine, Nanjing, 210003, China
| | - Fanrong Meng
- School of Pharmaceutical Sciences, Nanjing Tech University, Nanjing, 211816, China
| | - Huiling Wang
- School of Pharmaceutical Sciences, Nanjing Tech University, Nanjing, 211816, China
| | - Yishan Zheng
- Intensive Care Unit, The Second Hospital of Nanjing, Nanjing University of Chinese Medicine, Nanjing, 210003, China.
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Affiliation(s)
- Luciana Robino
- Departamento de Bacteriología y Virología, Facultad de Medicina, Universidad de la República, Montevideo, Alfredo Navarro 3051, PC 11600, Uruguay
| | - Paola Scavone
- Departamento de Microbiología, Instituto de Investigaciones Biológicas Clemente Estable, Montevideo, Av. Italia 3318, PC 11600, Uruguay
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Lee KS, Song Y, Kim CH, Kim YT, Kang T, Lee SJ, Choi BG, Lee KG. Development of zinc oxide-based sub-micro pillar arrays for on-site capture and DNA detection of foodborne pathogen. J Colloid Interface Sci 2020; 563:54-61. [DOI: 10.1016/j.jcis.2019.12.008] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2019] [Revised: 11/30/2019] [Accepted: 12/02/2019] [Indexed: 11/28/2022]
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Chang JS, Strunk J, Chong MN, Poh PE, Ocon JD. Multi-dimensional zinc oxide (ZnO) nanoarchitectures as efficient photocatalysts: What is the fundamental factor that determines photoactivity in ZnO? JOURNAL OF HAZARDOUS MATERIALS 2020; 381:120958. [PMID: 31416043 DOI: 10.1016/j.jhazmat.2019.120958] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/27/2019] [Revised: 08/01/2019] [Accepted: 08/01/2019] [Indexed: 06/10/2023]
Abstract
While bulk zinc oxide (ZnO) is of non-toxic in nature, ZnO nanoarchitectures could potentially induce the macroscopic characteristics of oxidative, lethality and toxicity in the water environment. Here we report a systematic study through state-of-the-art controllable synthesis of multi-dimensional ZnO nanoarchitectures (i.e. 0D-nanoparticle, 1D-nanorod, 2D-nanosheet, and 3D-nanoflowers), and subsequent in-depth understanding on the fundamental factor that determines their photoactivities. The photoactivities of resultant ZnO nanoarchitectures were interpreted in terms of the photodegradation of salicylic acid as well as inactivation of Bacillus subtilis and Escherichia coli under UV-A irradiation. Photodegradation results showed that 1D-ZnO nanorods demonstrated the highest salicylic acid photodegradation efficiency (99.4%) with a rate constant of 0.0364 min-1. 1D-ZnO nanorods also exhibited the highest log reductions of B. subtilis and E. coli of 3.5 and 4.2, respectively. Through physicochemical properties standardisation, an intermittent higher k value for pore diameter (0.00097 min-1 per mm), the highest k values for crystallite size (0.00171 min-1 per nm) and specific surface area (0.00339 min-1 per m2/g) contributed to the exceptional photodegradation performance of nanorods. Whereas, the average normalised log reduction against the physicochemical properties of nanorods (i.e. low crystallite size, high specific surface area and pore diameter) caused the strongest bactericidal effect.
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Affiliation(s)
- Jang Sen Chang
- School of Engineering, Chemical Engineering Discipline, Monash University Malaysia, Jalan Lagoon Selatan, Bandar Sunway, Selangor DE 47500, Malaysia
| | - Jennifer Strunk
- Leibniz-Institut für Katalyse e.V. an der Universität Rostock (LIKAT), Albert-Einstein-Str. 29a, Rostock 18059, Germany
| | - Meng Nan Chong
- School of Engineering, Chemical Engineering Discipline, Monash University Malaysia, Jalan Lagoon Selatan, Bandar Sunway, Selangor DE 47500, Malaysia.
| | - Phaik Eong Poh
- School of Engineering, Chemical Engineering Discipline, Monash University Malaysia, Jalan Lagoon Selatan, Bandar Sunway, Selangor DE 47500, Malaysia
| | - Joey D Ocon
- Laboratory of Electrochemical Engineering (LEE), Department of Chemical Engineering, University of the Philippines Diliman, Quezon City 1101, Philippines
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Thakur S, Mandal SK. Morphology engineering of ZnO nanorod arrays to hierarchical nanoflowers for enhanced photocatalytic activity and antibacterial action against Escherichia coli. NEW J CHEM 2020. [DOI: 10.1039/d0nj01661f] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A facile, efficient hydrothermal synthesis of ZnO nanoflowers followed by post-synthetic annealing and their photocatalytic and antibacterial properties are reported.
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Affiliation(s)
- Smriti Thakur
- Department of Chemical Sciences
- Indian Institute of Science Education and Research Mohali
- Mohali
- India
| | - Sanjay K. Mandal
- Department of Chemical Sciences
- Indian Institute of Science Education and Research Mohali
- Mohali
- India
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Sikder P, Bhaduri SB, Ong JL, Guda T. Silver (Ag) doped magnesium phosphate microplatelets as next‐generation antibacterial orthopedic biomaterials. J Biomed Mater Res B Appl Biomater 2019; 108:976-989. [DOI: 10.1002/jbm.b.34450] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2019] [Revised: 06/06/2019] [Accepted: 07/11/2019] [Indexed: 01/17/2023]
Affiliation(s)
- Prabaha Sikder
- Department of Mechanical Industrial and Manufacturing Engineering The University of Toledo Toledo Ohio
| | - Sarit B. Bhaduri
- Department of Mechanical Industrial and Manufacturing Engineering The University of Toledo Toledo Ohio
| | - Joo L. Ong
- Department of Biomedical Engineering The University of Texas at San Antonio San Antonio Texas
| | - Teja Guda
- Department of Biomedical Engineering The University of Texas at San Antonio San Antonio Texas
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Lan S, Lu Y, Zhang J, Guo Y, Li C, Zhao S, Sheng X, Dong A. Electrospun Sesbania Gum-Based Polymeric N-Halamines for Antibacterial Applications. Polymers (Basel) 2019; 11:E1117. [PMID: 31266230 PMCID: PMC6680915 DOI: 10.3390/polym11071117] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2019] [Revised: 06/20/2019] [Accepted: 06/20/2019] [Indexed: 12/12/2022] Open
Abstract
Microorganism pollution induced by pathogens has become a serious concern in recent years. In response, research on antibacterial N-halamines has made impressive progress in developing ways to combat this pollution. While synthetic polymer-based N-halamines have been widely developed and in some cases even commercialized, N-halamines based on naturally occurring polymers remain underexplored. In this contribution, we report for the first time on a strategy for developing sesbania gum (SG)-based polymeric N-halamines by a four-step approach Using SG as the initial polymer, we obtained SG-based polymeric N-halamines (abbreviated as cSG-PAN nanofibers) via a step-by-step controllable synthesis process. With the assistance of advanced techniques, the as-synthesized cSG-PAN nanofibers were systematically characterized in terms of their chemical composition and morphology. In a series of antibacterial and cytotoxicity evaluations, the as-obtained cSG-PAN nanofibers displayed good antibacterial activity against Escherichia coli and Staphylococcus aureus, as well as low cytotoxicity towards A549 cells. We believe this study offers a guide for developing naturally occurring polymer-based antibacterial N-halamines that have great potential for antibacterial applications.
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Affiliation(s)
- Shi Lan
- College of Science, Inner Mongolia Agricultural University, Hohhot 010018, China
| | - Yaning Lu
- College of Science, Inner Mongolia Agricultural University, Hohhot 010018, China
| | - Jinghua Zhang
- College of Science, Inner Mongolia Agricultural University, Hohhot 010018, China
| | - Yanan Guo
- College of Science, Inner Mongolia Agricultural University, Hohhot 010018, China
| | - Chun Li
- College of Science, Inner Mongolia Agricultural University, Hohhot 010018, China
| | - Shuang Zhao
- College of Science, Inner Mongolia Agricultural University, Hohhot 010018, China
| | - Xianliang Sheng
- College of Science, Inner Mongolia Agricultural University, Hohhot 010018, China.
| | - Alideertu Dong
- College of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot 010021, China.
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Lan S, Lu Y, Li C, Zhao S, Liu N, Sheng X. Sesbania Gum-Supported Hydrophilic Electrospun Fibers Containing Nanosilver with Superior Antibacterial Activity. NANOMATERIALS (BASEL, SWITZERLAND) 2019; 9:E592. [PMID: 30974842 PMCID: PMC6523858 DOI: 10.3390/nano9040592] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/09/2019] [Revised: 04/04/2019] [Accepted: 04/05/2019] [Indexed: 11/16/2022]
Abstract
In this contribution, we report for the first time on a new strategy for developing sesbania gum-supported hydrophilic fibers containing nanosilver using electrospinning (SG-Ag/PAN electrospun fibers), which gives the fibers superior antibacterial activity. Employing a series of advanced technologies-scanning electron microscopy, transmission electron microscopy, Fourier transform infrared spectroscopy, UV-visible absorption spectroscopy, X-ray photoelectron spectroscopy, and contact angle testing-we characterized the as-synthesized SG-Ag/PAN electrospun fibers in terms of morphology, size, surface state, chemical composition, and hydrophilicity. By adjusting the synthesis conditions, in particular the feed ratio of sesbania gum (SG) and polyacrylonitrile (PAN) to Ag nanoparticles (NPs), we regulated the morphology and size of the as-electrospun fibers. The fibers' antibacterial properties were examined using the colony-counting method with two model bacteria: Escherichia coli (a Gram-negative bacterium) and Staphylococcus aureus (a Gram-positive bacterium). Interestingly, compared to Ag/PAN and SG-PAN electrospun fibers, the final SG-Ag/PAN showed enhanced antibacterial activity towards both of the model bacteria due to the combination of antibacterial Ag NPs and hydrophilic SG, which enabled the fibers to have sufficient contact with the bacteria. We believe this strategy has great potential for applications in antibacterial-related fields.
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Affiliation(s)
- Shi Lan
- College of Science, Inner Mongolia Agricultural University, Hohhot 010018, China.
| | - Yaning Lu
- College of Science, Inner Mongolia Agricultural University, Hohhot 010018, China.
| | - Chun Li
- College of Science, Inner Mongolia Agricultural University, Hohhot 010018, China.
| | - Shuang Zhao
- College of Science, Inner Mongolia Agricultural University, Hohhot 010018, China.
| | - Naren Liu
- College of Science, Inner Mongolia Agricultural University, Hohhot 010018, China.
| | - Xianliang Sheng
- College of Science, Inner Mongolia Agricultural University, Hohhot 010018, China.
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Gupta A, Srivastava R. Mini submersible pump assisted sonochemical reactors: Large-scale synthesis of zinc oxide nanoparticles and nanoleaves for antibacterial and anti-counterfeiting applications. ULTRASONICS SONOCHEMISTRY 2019; 52:414-427. [PMID: 30755387 DOI: 10.1016/j.ultsonch.2018.12.020] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/09/2018] [Revised: 11/13/2018] [Accepted: 12/11/2018] [Indexed: 06/09/2023]
Abstract
Low cost, environmentally friendly and industrial-scale approaches for the synthesis of anti-counterfeiting and antibacterial materials are a challenging task. The current research reports novel and inexpensive approaches for the synthesis of zinc oxide nanostructures (ZnO-NSs) using Mini Submersible Pump (MSP) assisted sonochemical reactors. Zinc oxide nanoleaves (ZnO-NLs) were synthesized using MSP assisted sonochemical mixing reactor at gram-scale (4 g). Zinc oxide nanoparticles (ZnO-NPs) were synthesized using MSP assisted sonochemical flow loop reactor at gram-scale (11.5 g). Synthesized ZnO-NSs were characterized by UV-visible spectroscopy, fluorescence spectroscopy, XRD, FTIR, TGA, BET, FEG-SEM, and FEG-TEM. Bare ZnO-NPs and ZnO-NPs coated cotton fabric showed high antibacterial activity against diseases causing Gram-positive bacteria Staphylococcus aureus. Based on the UV fluorescence property of the ZnO-NLs, invisible security ink was developed for anti-counterfeiting applications. The invisible security ink was tested as a rubber stamp and fountain pen inks which were found to be stable on the various kinds of microporous papers. As compared to our previously reported method, disperser assisted sonochemical approach for ZnO-NLs synthesis; the current approach reduces the cost of equipment used from ∼1700 to 4 USD. Both reactors are designed simply (less complicated), based on an environmentally friendly approach, highly scalable, increases the effectiveness of the sonochemical technique and suitable for industrial applications.
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Affiliation(s)
- Anadi Gupta
- Department of Biosciences and Bioengineering, Indian Institute of Technology Bombay, Mumbai, India
| | - Rohit Srivastava
- Department of Biosciences and Bioengineering, Indian Institute of Technology Bombay, Mumbai, India.
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Tuning crystallization and morphology of zinc oxide with polyvinylpyrrolidone: Formation mechanisms and antimicrobial activity. J Colloid Interface Sci 2019; 546:43-52. [PMID: 30903808 DOI: 10.1016/j.jcis.2019.03.051] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2019] [Revised: 03/13/2019] [Accepted: 03/14/2019] [Indexed: 11/23/2022]
Abstract
Zinc oxide (ZnO) particles with different shapes and sizes have been previously reported to possess unique optical, electrical, photocatalytic, and antimicrobial properties. Capping agents are routinely used to control particle morphologies; however, few studies have evaluated the influence of capping agents on the growth kinetics of ZnO particles of different shapes. Herein, we report a simple water-based chemical precipitation method to produce unique bowtie-, flower-, and nest-shaped ZnO particles using zinc nitrate and urea in the presence of polyvinylpyrrolidone (PVP). Three distinct particle morphologies are obtained by adjusting polymer concentration during synthesis. This approach is simple and could enable large-scale production of ZnO particles with diverse shapes. We monitor the morphological evolution of ZnO particles and, at different polymer concentrations, uncover the preferable PVP adsorption onto different ZnO facets that controls the growth directions of ZnO. Previous reports have demonstrated the influence of particle shape on ZnO antibacterial activity. In this study, we show that ZnO particles with these three morphologies exhibit similar bacterial killing efficacy towards Escherichia coli and Staphylococcus aureus. Our detailed mechanistic studies suggest that the antibacterial mechanism of ZnO particles can be attributed to both Zn2+ release and oxidative stress, whereas shape plays only a minor role in the antibacterial activity of ZnO particles.
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Horky P, Skalickova S, Urbankova L, Baholet D, Kociova S, Bytesnikova Z, Kabourkova E, Lackova Z, Cernei N, Gagic M, Milosavljevic V, Smolikova V, Vaclavkova E, Nevrkla P, Knot P, Krystofova O, Hynek D, Kopel P, Skladanka J, Adam V, Smerkova K. Zinc phosphate-based nanoparticles as a novel antibacterial agent: in vivo study on rats after dietary exposure. J Anim Sci Biotechnol 2019; 10:17. [PMID: 30805185 PMCID: PMC6373129 DOI: 10.1186/s40104-019-0319-8] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2018] [Accepted: 01/09/2019] [Indexed: 11/10/2022] Open
Abstract
Background Development of new nanomaterials that inhibit or kill bacteria is an important and timely research topic. For example, financial losses due to infectious diseases, such as diarrhea, are a major concern in livestock productions around the world. Antimicrobial nanoparticles (NPs) represent a promising alternative to antibiotics and may lower antibiotic use and consequently spread of antibiotic resistance traits among bacteria, including pathogens. Results Four formulations of zinc nanoparticles (ZnA, ZnB, ZnC, and ZnD) based on phosphates with spherical (ZnA, ZnB) or irregular (ZnC, ZnD) morphology were prepared. The highest in vitro inhibitory effect of our NPs was observed against Staphylococcus aureus (inhibitory concentration values, IC50, ranged from 0.5 to 1.6 mmol/L), followed by Escherichia coli (IC50 0.8-1.5 mmol/L). In contrast, methicillin resistant S. aureus (IC50 1.2-4.7 mmol/L) was least affected and this was similar to inhibitory patterns of commercial ZnO-based NPs and ZnO. After the successful in vitro testing, the in vivo study with rats based on dietary supplementation with zinc NPs was conducted. Four groups of rats were treated by 2,000 mg Zn/kg diet of ZnA, ZnB, ZnC, and ZnD, for comparison two groups were supplemented by 2,000 mg Zn/kg diet of ZnO-N and ZnO, and one group (control) was fed only by basal diet. The significantly higher (P < 0.05) Zn level in liver and kidney of all treated groups was found, nevertheless Zn NPs did not greatly influence antioxidant status of rats. However, the total aerobic and coliform bacterial population in rat feces significantly decreased (P < 0.05) in all zinc groups after 30 d of the treatment. Furthermore, when compared to the ZnO group, ZnA and ZnC nanoparticles reduced coliforms significantly more (P < 0.05). Conclusions Our results demonstrate that phosphate-based zinc nanoparticles have the potential to act as antibiotic agents.
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Affiliation(s)
- Pavel Horky
- 1Department of Animal Nutrition and Forage Production, Mendel University in Brno, Zemedelska 1, CZ-613 00 Brno, Czech Republic
| | - Sylvie Skalickova
- 1Department of Animal Nutrition and Forage Production, Mendel University in Brno, Zemedelska 1, CZ-613 00 Brno, Czech Republic
| | - Lenka Urbankova
- 1Department of Animal Nutrition and Forage Production, Mendel University in Brno, Zemedelska 1, CZ-613 00 Brno, Czech Republic
| | - Daria Baholet
- 1Department of Animal Nutrition and Forage Production, Mendel University in Brno, Zemedelska 1, CZ-613 00 Brno, Czech Republic
| | - Silvia Kociova
- 2Department of Chemistry and Biochemistry, Mendel University in Brno, Zemedelska 1, CZ-613 00 Brno, Czech Republic
| | - Zuzana Bytesnikova
- 2Department of Chemistry and Biochemistry, Mendel University in Brno, Zemedelska 1, CZ-613 00 Brno, Czech Republic
| | - Eliska Kabourkova
- 2Department of Chemistry and Biochemistry, Mendel University in Brno, Zemedelska 1, CZ-613 00 Brno, Czech Republic
| | - Zuzana Lackova
- 2Department of Chemistry and Biochemistry, Mendel University in Brno, Zemedelska 1, CZ-613 00 Brno, Czech Republic.,3Central European Institute of Technology, Brno University of Technology, Purkynova 123, CZ-612 00 Brno, Czech Republic
| | - Natalia Cernei
- 2Department of Chemistry and Biochemistry, Mendel University in Brno, Zemedelska 1, CZ-613 00 Brno, Czech Republic.,3Central European Institute of Technology, Brno University of Technology, Purkynova 123, CZ-612 00 Brno, Czech Republic
| | - Milica Gagic
- 2Department of Chemistry and Biochemistry, Mendel University in Brno, Zemedelska 1, CZ-613 00 Brno, Czech Republic
| | - Vedran Milosavljevic
- 2Department of Chemistry and Biochemistry, Mendel University in Brno, Zemedelska 1, CZ-613 00 Brno, Czech Republic.,3Central European Institute of Technology, Brno University of Technology, Purkynova 123, CZ-612 00 Brno, Czech Republic
| | - Vendula Smolikova
- 2Department of Chemistry and Biochemistry, Mendel University in Brno, Zemedelska 1, CZ-613 00 Brno, Czech Republic.,3Central European Institute of Technology, Brno University of Technology, Purkynova 123, CZ-612 00 Brno, Czech Republic
| | - Eva Vaclavkova
- 4Institute of Animal Science, Komenskeho 1239, CZ-517 41 Kostelec nad Orlici, Czech Republic
| | - Pavel Nevrkla
- 5Department of Animal Breeding, Mendel University in Brno, Zemedelska 1, CZ-613 00 Brno, Czech Republic
| | - Pavel Knot
- 1Department of Animal Nutrition and Forage Production, Mendel University in Brno, Zemedelska 1, CZ-613 00 Brno, Czech Republic
| | - Olga Krystofova
- 2Department of Chemistry and Biochemistry, Mendel University in Brno, Zemedelska 1, CZ-613 00 Brno, Czech Republic.,3Central European Institute of Technology, Brno University of Technology, Purkynova 123, CZ-612 00 Brno, Czech Republic
| | - David Hynek
- 2Department of Chemistry and Biochemistry, Mendel University in Brno, Zemedelska 1, CZ-613 00 Brno, Czech Republic.,3Central European Institute of Technology, Brno University of Technology, Purkynova 123, CZ-612 00 Brno, Czech Republic
| | - Pavel Kopel
- 2Department of Chemistry and Biochemistry, Mendel University in Brno, Zemedelska 1, CZ-613 00 Brno, Czech Republic.,3Central European Institute of Technology, Brno University of Technology, Purkynova 123, CZ-612 00 Brno, Czech Republic
| | - Jiri Skladanka
- 1Department of Animal Nutrition and Forage Production, Mendel University in Brno, Zemedelska 1, CZ-613 00 Brno, Czech Republic
| | - Vojtech Adam
- 2Department of Chemistry and Biochemistry, Mendel University in Brno, Zemedelska 1, CZ-613 00 Brno, Czech Republic.,3Central European Institute of Technology, Brno University of Technology, Purkynova 123, CZ-612 00 Brno, Czech Republic
| | - Kristyna Smerkova
- 2Department of Chemistry and Biochemistry, Mendel University in Brno, Zemedelska 1, CZ-613 00 Brno, Czech Republic.,3Central European Institute of Technology, Brno University of Technology, Purkynova 123, CZ-612 00 Brno, Czech Republic
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Gao T, Borjihan Q, Yang J, Qu H, Liu W, Li Q, Wang YJ, Dong A. Antibacterial Povidone-Iodine-Conjugated Cross-Linked Polystyrene Resin for Water Bacterial Decontamination. ACS APPLIED BIO MATERIALS 2019; 2:1310-1321. [DOI: 10.1021/acsabm.9b00012] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
| | | | - Jiebing Yang
- Key Laboratory for Molecular Enzymology and Engineering of Ministry of Education, School of Life Sciences, Jilin University, Changchun 130012, People’s Republic of China
| | | | | | - Quanshun Li
- Key Laboratory for Molecular Enzymology and Engineering of Ministry of Education, School of Life Sciences, Jilin University, Changchun 130012, People’s Republic of China
| | - Yan-Jie Wang
- School of Environment and Civil Engineering, Dongguan University of Technology, No. 1, Daxue Road, Songshan Lake, Dongguan, Guangdong 523808, People’s Republic of China
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Soleimani Lashkenari M, Ghorbani M, Naghibi H, Khalaj P. Synthesis and characterization of polyrhodanine/nickel ferrite nanocomposite with an effective and broad spectrum antibacterial activity. POLYM-PLAST TECH MAT 2019. [DOI: 10.1080/25740881.2018.1563124] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
| | - Mohsen Ghorbani
- Department of Chemical Engineering, Babol Noshirvani University of Technolgy, Shariati Ave., Babol, Iran
| | - Hananeh Naghibi
- Chemical Engineering Department, Mazandaran University of Science & Technology, Babol, Iran
| | - Pouria Khalaj
- North Tehran Branch, Islamic Azad University, Tehran, Iran
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47
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Gao Y, Song N, Liu W, Dong A, Wang YJ, Yang YW. Construction of Antibacterial N-Halamine Polymer Nanomaterials Capable of Bacterial Membrane Disruption for Efficient Anti-Infective Wound Therapy. Macromol Biosci 2019; 19:e1800453. [PMID: 30645044 DOI: 10.1002/mabi.201800453] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2018] [Revised: 12/18/2018] [Indexed: 01/31/2023]
Abstract
The increasing occurrence of bacterial infection at the wound sites is a serious global problem, demanding the rapid development of new antibacterial materials for wound dressing to avoid the abuse of antibiotics and thereby antibiotic resistance. In this work, the authors first report on antibacterial N-halamine polymer nanomaterials based on a strategic copolymerization of 3-allyl-5,5-dimethylhydantoin (ADMH) and methyl methacrylate (MMA), which exhibits in vitro and in vivo antimicrobial efficacy against pathogenic bacteria including Staphylococcus aureus and Escherichia coli. Particularly, when a biological evaluation is run for wound therapy, the N-halamine polymer nanomaterials exhibit a powerful antibacterial efficiency and wound healing ability after a series of histological examination of mouse wound. After the evaluation of biological and chemical surroundings, the proposed four-stage mechanism suggests that, with unique antibacterial NCl bonds, the N-halamine polymer nanomaterials can disrupt the bacterial membrane, as a result causing intracellular content leaked out and thereby cell death. Based on the synergistic action of antibacterial and wound therapy, the N-halamine polymer nanomaterials are expected to be promising as wound dressing materials in medical healing and biomaterials.
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Affiliation(s)
- Yangyang Gao
- Engineering Research Center of Dairy Quality and Safety Control Technology, Ministry of Education, College of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot, 010021, P. R. China
| | - Nan Song
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, International Joint Research Laboratory of Nano-Micro Architecture Chemistry (NMAC), College of Chemistry, Jilin University, Changchun, 130012, P. R. China
| | - Wenxin Liu
- Engineering Research Center of Dairy Quality and Safety Control Technology, Ministry of Education, College of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot, 010021, P. R. China
| | - Alideertu Dong
- Engineering Research Center of Dairy Quality and Safety Control Technology, Ministry of Education, College of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot, 010021, P. R. China
| | - Yan-Jie Wang
- School of Environment and Civil Engineering, Dongguan University of Technology, Dongguan, Guangdong, 523808, P. R. China
| | - Ying-Wei Yang
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, International Joint Research Laboratory of Nano-Micro Architecture Chemistry (NMAC), College of Chemistry, Jilin University, Changchun, 130012, P. R. China
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Borjihan Q, Yang J, Song Q, Gao L, Xu M, Gao T, Liu W, Li P, Li Q, Dong A. Povidone-iodine-functionalized fluorinated copolymers with dual-functional antibacterial and antifouling activities. Biomater Sci 2019; 7:3334-3347. [DOI: 10.1039/c9bm00583h] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Povidone-iodine-functionalized fluorinated polymer coatings with dual-functional antibacterial and antifouling activities should be very promising in practical biomedical applications.
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Affiliation(s)
- Qinggele Borjihan
- College of Chemistry and Chemical Engineering
- Inner Mongolia University
- Hohhot 010021
- People's Republic of China
| | - Jiebing Yang
- Key Laboratory for Molecular Enzymology and Engineering of Ministry of Education
- School of Life Sciences
- Jilin University
- Changchun 130012
- People's Republic of China
| | - Qing Song
- Xi'an Institute of Flexible Electronics & Xi'an Institute of Biomedical Materials and Engineering
- Northwestern Polytechnical University (NPU)
- Xi'an 710072
- China
| | - Lingling Gao
- Xi'an Institute of Flexible Electronics & Xi'an Institute of Biomedical Materials and Engineering
- Northwestern Polytechnical University (NPU)
- Xi'an 710072
- China
- Key Laboratory of Flexible Electronics (KLOFE) and Institute of Advanced Materials (IAM) Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM)
| | - Miao Xu
- Xi'an Institute of Flexible Electronics & Xi'an Institute of Biomedical Materials and Engineering
- Northwestern Polytechnical University (NPU)
- Xi'an 710072
- China
- Key Laboratory of Flexible Electronics (KLOFE) and Institute of Advanced Materials (IAM) Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM)
| | - Tianyi Gao
- College of Chemistry and Chemical Engineering
- Inner Mongolia University
- Hohhot 010021
- People's Republic of China
| | - Wenxin Liu
- College of Chemistry and Chemical Engineering
- Inner Mongolia University
- Hohhot 010021
- People's Republic of China
| | - Peng Li
- Xi'an Institute of Flexible Electronics & Xi'an Institute of Biomedical Materials and Engineering
- Northwestern Polytechnical University (NPU)
- Xi'an 710072
- China
- Key Laboratory of Flexible Electronics (KLOFE) and Institute of Advanced Materials (IAM) Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM)
| | - Quanshun Li
- Key Laboratory for Molecular Enzymology and Engineering of Ministry of Education
- School of Life Sciences
- Jilin University
- Changchun 130012
- People's Republic of China
| | - Alideertu Dong
- College of Chemistry and Chemical Engineering
- Inner Mongolia University
- Hohhot 010021
- People's Republic of China
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Visinescu D, Hussien MD, Moreno JC, Negrea R, Birjega R, Somacescu S, Ene CD, Chifiriuc MC, Popa M, Stan MS, Carp O. Zinc Oxide Spherical-Shaped Nanostructures: Investigation of Surface Reactivity and Interactions with Microbial and Mammalian Cells. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:13638-13651. [PMID: 30340439 DOI: 10.1021/acs.langmuir.8b02528] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Two ZnO materials of spherical hierarchical morphologies, with hollow (ZnOHS) and solid cores (ZnOSS), were obtained through the hydrolysis of zinc acetylacetonate in 1,4-butanediol. The nature of the defects and surface reactivity for the two ZnO materials were investigated through photoluminescence, X-ray photoelectron spectroscopy, and electron paramagnetic resonance (EPR) spectroscopy proving the coexistence of shallow and deep defects and, also, the presence of polyol byproducts adsorbed on the outer layers of the ZnO samples. The EPR spectroscopy coupled with the spin-trapping technique showed that the surface of the ZnO samples generates reactive oxygen species (ROS) like hydroxyl (•OH) and singlet oxygen (1O2) as well as carbon-centered radicals. The ZnO materials exhibited a wide spectrum of antimicrobial activity, being active against Gram-positive, Gram-negative, and fungi strains, both in planktonic and, more importantly, adherent growth states. The decrease of antimicrobial efficiency in the presence of a ROS scavenger (mannitol) and the decrease of the cell viability with the ROS level suggest that one of the mechanisms that governs both the antimicrobial and cytotoxic activities on human liver cells is ROS-mediated. However, at active antimicrobial concentrations, the biocompatibility of the tested materials is very good.
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Affiliation(s)
- Diana Visinescu
- "Ilie Murgulescu" Institute of Physical Chemistry , Romanian Academy , 202 Splaiul Independentei , 060021 Bucharest , Romania
| | | | - Jose Calderon Moreno
- "Ilie Murgulescu" Institute of Physical Chemistry , Romanian Academy , 202 Splaiul Independentei , 060021 Bucharest , Romania
| | - Raluca Negrea
- National Institute of Materials Physics , Atomistilor 105bis , 77125 Magurele , Ilfov , Romania
| | - Ruxandra Birjega
- National Institute for Lasers, Plasma and Radiation Physics , 409 Atomistilor , P.O. Box MG-36, 077125 Bucharest , Romania
| | - Simona Somacescu
- "Ilie Murgulescu" Institute of Physical Chemistry , Romanian Academy , 202 Splaiul Independentei , 060021 Bucharest , Romania
| | - Cristian D Ene
- "Ilie Murgulescu" Institute of Physical Chemistry , Romanian Academy , 202 Splaiul Independentei , 060021 Bucharest , Romania
| | | | | | | | - Oana Carp
- "Ilie Murgulescu" Institute of Physical Chemistry , Romanian Academy , 202 Splaiul Independentei , 060021 Bucharest , Romania
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50
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Visible light responsive flower-like ZnO in photocatalytic antibacterial mechanism towards Enterococcus faecalis and Micrococcus luteus. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2018; 187:66-75. [PMID: 30099271 DOI: 10.1016/j.jphotobiol.2018.07.030] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/24/2018] [Revised: 07/05/2018] [Accepted: 07/30/2018] [Indexed: 12/20/2022]
Abstract
Flower-like ZnO micro/nanostructures were successfully fabricated via a surfactant-free co-precipitation method. The as-synthesized product was characterized using X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), energy dispersive X-ray (EDX), transmission electron microscopy (TEM), fourier transform infrared spectroscopy (FTIR), UV-vis diffuse reflectance spectroscopy (UV-vis DRS) and photoluminescence (PL) analyses. In the presence of visible light irradiation, the as-synthesized flower-like ZnO showed higher antibacterial activities against Enterococcus faecalis (E. faecalis) and Micrococcus luteus (M. luteus) than that of commercial ZnO. The excellent antibacterial performance of synthesized flower-like ZnO was also observed via the bacterial morphological change, K+ ions leakage and protein leakage in extracellular suspension. In addition, the FTIR investigation on both treated bacteria further confirmed the bacterial membrane damage via cellular substance alteration. The enhancement of the antibacterial activity of synthesized ZnO can be attributed to the unique flower-like morphology which can increase the surface OH- groups and the quantity of photogenerated electron-hole pair available to participate in the photocatalytic reaction. The reactive oxidizing species (ROS) scavengers experiments showed that H2O2 played a main role in the photocatalytic antibacterial process. Our study showed that the synthesized flower-like ZnO micro/nanostructures can act as efficient antibacterial agents in the photocatalytic antibacterial process under visible light irradiation.
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