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Zhu Z, Tang R, Li C, An X, He L. Promises of Plasmonic Antenna-Reactor Systems in Gas-Phase CO 2 Photocatalysis. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2023; 10:e2302568. [PMID: 37338243 PMCID: PMC10460874 DOI: 10.1002/advs.202302568] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/22/2023] [Revised: 05/26/2023] [Indexed: 06/21/2023]
Abstract
Sunlight-driven photocatalytic CO2 reduction provides intriguing opportunities for addressing the energy and environmental crises faced by humans. The rational combination of plasmonic antennas and active transition metal-based catalysts, known as "antenna-reactor" (AR) nanostructures, allows the simultaneous optimization of optical and catalytic performances of photocatalysts, and thus holds great promise for CO2 photocatalysis. Such design combines the favorable absorption, radiative, and photochemical properties of the plasmonic components with the great catalytic potentials and conductivities of the reactor components. In this review, recent developments of photocatalysts based on plasmonic AR systems for various gas-phase CO2 reduction reactions with emphasis on the electronic structure of plasmonic and catalytic metals, plasmon-driven catalytic pathways, and the role of AR complex in photocatalytic processes are summarized. Perspectives in terms of challenges and future research in this area are also highlighted.
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Affiliation(s)
- Zhijie Zhu
- Institute of Functional Nano & Soft Materials (FUNSOM)Soochow UniversitySuzhou215123P. R. China
| | - Rui Tang
- Institute of Functional Nano & Soft Materials (FUNSOM)Soochow UniversitySuzhou215123P. R. China
| | - Chaoran Li
- Institute of Functional Nano & Soft Materials (FUNSOM)Soochow UniversitySuzhou215123P. R. China
- Jiangsu Key Laboratory for Carbon‐Based Functional Materials & DevicesSoochow UniversitySuzhouJiangsu215123P. R. China
| | - Xingda An
- Institute of Functional Nano & Soft Materials (FUNSOM)Soochow UniversitySuzhou215123P. R. China
- Jiangsu Key Laboratory of Advanced Negative Carbon TechnologiesSoochow UniversitySuzhouJiangsu215123P. R. China
| | - Le He
- Institute of Functional Nano & Soft Materials (FUNSOM)Soochow UniversitySuzhou215123P. R. China
- Jiangsu Key Laboratory of Advanced Negative Carbon TechnologiesSoochow UniversitySuzhouJiangsu215123P. R. China
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Chen S, Guo X, Zhang B, Nie D, Rao W, Zhang D, Lü J, Guan X, Chen Z, Pan X. Mesoporous Silica Nanoparticles Induce Intracellular Peroxidation Damage of Phytophthora infestans: A New Type of Green Fungicide for Late Blight Control. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2023; 57:3980-3989. [PMID: 36808949 DOI: 10.1021/acs.est.2c07182] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Nanopesticides are considered to be a promising alternative strategy for enhancing bioactivity and delaying the development of pathogen resistance to pesticides. Here, a new type of nanosilica fungicide was proposed and demonstrated to control late blight by inducing intracellular peroxidation damage to Phytophthora infestans, the pathogen associated with potato late blight. Results indicated that the structural features of different silica nanoparticles were largely responsible for their antimicrobial activities. Mesoporous silica nanoparticles (MSNs) exhibited the highest antimicrobial activity with a 98.02% inhibition rate of P. infestans, causing oxidative stress responses and cell structure damage in P. infestans. For the first time, MSNs were found to selectively induce spontaneous excess production of intracellular reactive oxygen species in pathogenic cells, including hydroxyl radicals (•OH), superoxide radicals (•O2-), and singlet oxygen (1O2), leading to peroxidation damage in P. infestans. The effectiveness of MSNs was further tested in the pot experiments as well as leaf and tuber infection, and successful control of potato late blight was achieved with high plant compatibility and safety. This work provides new insights into the antimicrobial mechanism of nanosilica and highlights the use of nanoparticles for controlling late blight with green and highly efficient nanofungicides.
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Affiliation(s)
- Saili Chen
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops & Key Lab of Biopesticide and Chemical Biology, Ministry of Education & Ministerial and Provincial Joint Innovation Centre for Safety Production of Cross-Strait Crops, College of Plant Protection, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, P. R. China
- College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, P. R. China
| | - Xueping Guo
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops & Key Lab of Biopesticide and Chemical Biology, Ministry of Education & Ministerial and Provincial Joint Innovation Centre for Safety Production of Cross-Strait Crops, College of Plant Protection, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, P. R. China
| | - Bintian Zhang
- Southern University of Science and Technology, Shenzhen, Guangdong 518055, P.R. China
| | - Danyue Nie
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops & Key Lab of Biopesticide and Chemical Biology, Ministry of Education & Ministerial and Provincial Joint Innovation Centre for Safety Production of Cross-Strait Crops, College of Plant Protection, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, P. R. China
| | - Wenhua Rao
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops & Key Lab of Biopesticide and Chemical Biology, Ministry of Education & Ministerial and Provincial Joint Innovation Centre for Safety Production of Cross-Strait Crops, College of Plant Protection, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, P. R. China
| | - Dingyang Zhang
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops & Key Lab of Biopesticide and Chemical Biology, Ministry of Education & Ministerial and Provincial Joint Innovation Centre for Safety Production of Cross-Strait Crops, College of Plant Protection, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, P. R. China
| | - Jian Lü
- College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, P. R. China
| | - Xiong Guan
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops & Key Lab of Biopesticide and Chemical Biology, Ministry of Education & Ministerial and Provincial Joint Innovation Centre for Safety Production of Cross-Strait Crops, College of Plant Protection, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, P. R. China
| | - Zhi Chen
- College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, P. R. China
| | - Xiaohong Pan
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops & Key Lab of Biopesticide and Chemical Biology, Ministry of Education & Ministerial and Provincial Joint Innovation Centre for Safety Production of Cross-Strait Crops, College of Plant Protection, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, P. R. China
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Niche Applications of MXene Materials in Photothermal Catalysis. CHEMISTRY 2023. [DOI: 10.3390/chemistry5010036] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/08/2023] Open
Abstract
MXene materials have found emerging applications as catalysts for chemical reactions due to their intriguing physical and chemical applications. In particular, their broad light response and strong photothermal conversion capabilities are likely to render MXenes promising candidates for photothermal catalysis, which is drawing increasing attention in both academic research and industrial applications. MXenes are likely to satisfy all three criteria of a desirable photothermal catalyst: strong light absorption, effective heat management, and versatile surface reactivity. However, their specific functionalities are largely dependent on their structure and composition, which makes understandings of the structure–function relationship of crucial significance. In this review, we mainly focus on the recent progress of MXene–based photothermal catalysts, emphasizing the functionalities and potential applications of MXene materials in fields of photothermal catalysis, and provide insights on design principles of highly efficient MXene–based photothermal catalysts from the atomic scale. This review provides a relatively thorough understanding of MXene–based materials for photothermal catalysis, as well as an in–depth investigation of emerging high-prospect applications in photothermal catalysis.
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Elshorbagy MH, Esteban Ó, Cuadrado A, Alda J. Optoelectronic refractometric sensing device for gases based on dielectric bow-ties and amorphous silicon solar cells. Sci Rep 2022; 12:18355. [PMID: 36319645 PMCID: PMC9626455 DOI: 10.1038/s41598-022-21299-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2022] [Accepted: 09/26/2022] [Indexed: 01/24/2023] Open
Abstract
The transformation of an hydrogenated amorphous silicon solar cell (aSiH) into an optoelectronic refratometric sensor has been possible through the addition of dielectric bow-tie resonant structures. The indium transparent oxide top electrode is replaced by a thin metallic layer to selectively prevent the direct transmission of light to the active layer of the cell. Then, an array of dielectric bow-tie structures is placed on top of this electrode, to activate the optical absorption through surface plasmon resonance (SPR). The whole device is exposed to the analyte under measure, which is the surrounding medium. Three different dielectric materials with low, medium, and high refractive index were selected for the bow-ties, namely magnesium fluoride (MgF[Formula: see text]), silicon dioxide (SiO[Formula: see text]), and aluminum nitride (AlN) have been tested as coupling structure for SPR excitation. The maximization of the readout/short circuit current has been achieved through the geometrical parameters of such structure. We have selected the geometrical parameters to maximize the short circuit current delivered by the a-Si cell at a given selected wavelength. The design has been customized to gas measurements application, where the index of refraction is slightly above 1 around 10[Formula: see text]. Our analysis reveals ultra-high sensitivity of [Formula: see text] (mA/W)/RIU, and a figure of merit FOM= 107 RIU[Formula: see text], when the bow-tie is made of SiO[Formula: see text]. A performance rally competitive with those previously reported in literature, with the additional advantage of circunventing both moving parts and spectral interrogation elements.
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Affiliation(s)
- Mahmoud H. Elshorbagy
- grid.411806.a0000 0000 8999 4945Physics Department, Faculty of Science, Minia University, 61519 El-Minya, Egypt ,grid.4795.f0000 0001 2157 7667Faculty of Optics and Optometry, Applied Optics Complutense Group, University Complutense of Madrid, C/Arcos de Jalón, 118, 28037 Madrid, Spain
| | - Óscar Esteban
- grid.7159.a0000 0004 1937 0239Photonics Engineering Group, University of Alcalá, 28801 Alcalá de Henares, Madrid Spain
| | - Alexander Cuadrado
- grid.28479.300000 0001 2206 5938Escuela de Ciencias Experimentales y Tecnología, University Rey Juan Carlos, 28933 Móstoles, Madrid, Spain
| | - Javier Alda
- grid.4795.f0000 0001 2157 7667Faculty of Optics and Optometry, Applied Optics Complutense Group, University Complutense of Madrid, C/Arcos de Jalón, 118, 28037 Madrid, Spain
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Stavitskaya A, Khusnetdenova E, Vinokurov V, Lvov Y, Fakhrullin R. Prokaryotic and eukaryotic toxicity of halloysite decorated with photoactive nanoparticles. Chem Commun (Camb) 2022; 58:7719-7729. [PMID: 35781299 DOI: 10.1039/d2cc02439j] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
The development of new approaches to treat the growing antibiotic resistance of pathogenic bacterial species is an important task to ensure the future safety of society. Utilization of irradiation of different wavelengths together with nanostructured materials based on metal containing nanoparticles may result in synergetic antibacterial effects. In this paper we aim to show the main conceptions of light-assisted bacteria deactivation techniques and prospects of application of natural clay nanotubes as a carrier for scalable photoactive antibacterial nanomaterials. Halloysite aluminosilicate nanotubes (ca 50 nm diameter, ca. 1.0 μm length) are safe and biocompatible natural materials produced in tons. Their application as a template or a carrier for metal nanoparticles, QDs and organic compounds has already found application in biomedical research, cosmetics, polymers, coatings, catalysis and related applications. Here, we show the toxicity of halloysite decorated with photoactive nanoparticles on prokaryotic and eukaryotic cells. The formation of light active nanostructured materials with this clay as the base is a promising tool for solving the problem of the antibiotic resistance of microorganisms.
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Affiliation(s)
- Anna Stavitskaya
- Department of Physical and Colloid Chemistry, Gubkin State University, Moscow, Russian Federation
| | - Elnara Khusnetdenova
- Department of Physical and Colloid Chemistry, Gubkin State University, Moscow, Russian Federation
| | - Vladimir Vinokurov
- Department of Physical and Colloid Chemistry, Gubkin State University, Moscow, Russian Federation
| | - Yuri Lvov
- Institute for Micromanufacturing, Louisiana Technical University, Ruston, USA
| | - Rawil Fakhrullin
- Department of Physical and Colloid Chemistry, Gubkin State University, Moscow, Russian Federation.,Institute of Fundamental Medicine and Biology, Kazan Federal University, Republic of Tatarstan, Russian Federation.
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An X, Kays JC, Lightcap IV, Ouyang T, Dennis AM, Reinhard BM. Wavelength-Dependent Bifunctional Plasmonic Photocatalysis in Au/Chalcopyrite Hybrid Nanostructures. ACS NANO 2022; 16:6813-6824. [PMID: 35349253 PMCID: PMC9676104 DOI: 10.1021/acsnano.2c01706] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Excited, or "hot" charge carrier generation and transfer driven by the decay of localized surface plasmon resonances (LSPRs) are key steps in plasmonic photocatalysis. Hybrid structures that contain both metal and semiconductor building blocks facilitate the extraction of reactive charge carriers and their utilization for photoelectrocatalysis. Additional functionality arises from hybrid structures that combine noble metal nanostructures with semiconductor components, such as chalcopyrite (CuFeS2) nanocrystals (NCs), which by themselves support quasistatic resonances. In this work, we use a hybrid membrane to integrate Au nanorods (NRs) with a longitudinal LSPR at 745 nm and CuFeS2 NCs with a resonance peak at 490 nm into water-stable nanocomposites for robust and bifunctional photocatalysis of oxygen and hydrogen evolution reactions in a wavelength-dependent manner. Excitation of NRs or NCs in the nanocomposite correlates with increased hydrogen or oxygen evolution, respectively, consistent with a light-driven electron transfer between the metal and semiconductor building blocks, the direction of which depends on the wavelength. The bifunctional photoreactivity of the nanocomposite is enhanced by Cu(I)/Cu(II)-assisted catalysis on the surface of the NCs.
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Affiliation(s)
- Xingda An
- Department of Chemistry, Boston University, Boston, MA 02215, USA
- The Photonics Center, Boston University, Boston, MA 02215, USA
| | - Joshua C. Kays
- Department of Biomedical Engineering, Boston University, Boston, MA 02215, USA
- The Photonics Center, Boston University, Boston, MA 02215, USA
| | - Ian V. Lightcap
- Center for Sustainable Energy, University of Notre Dame, Notre Dame, IN 46556, USA
| | - Tianhong Ouyang
- Department of Chemistry, Boston University, Boston, MA 02215, USA
- The Photonics Center, Boston University, Boston, MA 02215, USA
| | - Allison M. Dennis
- Department of Biomedical Engineering, Boston University, Boston, MA 02215, USA
- Division of Materials Science and Engineering, Boston University, Boston, MA 02215, USA
- The Photonics Center, Boston University, Boston, MA 02215, USA
| | - Björn M. Reinhard
- Department of Chemistry, Boston University, Boston, MA 02215, USA
- The Photonics Center, Boston University, Boston, MA 02215, USA
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7
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An X, Cheng R, Liu P, Reinhard BM. Plasmonic photoreactors-coated plastic tubing as combined-active-and-passive antimicrobial flow sterilizer. J Mater Chem B 2022; 10:2001-2010. [PMID: 35235640 PMCID: PMC9167571 DOI: 10.1039/d1tb02250d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Plastic materials are ubiquitous in medical devices and consumer goods. As bacterial contamination of plastic surfaces can pose significant health risks, there is a need for effective approaches both to inactivate bacteria on plastic surfaces and to prevent colonization of plastic surfaces. In this study, we evaluate a plasmonic photoreactor coating for plastic surfaces that provides both active and passive antimicrobial effects and implement a visible light-driven antibacterial flow sterilizer. We demonstrate that this approach inactivates bacteria in an aqueous suspension passed through a photoreactor-coated polyethylene tubing, achieving log reduction values (LRVs) > 5 for both Gram-positive and -negative bacteria under resonant LED illumination. Importantly, the antimicrobial flow sterilizers do not cause a detectable loss of functionality for monoclonal antibodies that were included in this work as an example of high-value biologics that require sterilization. Under ambient light illumination, the plasmonic photoreactor coating exhibits a significant inhibitory effect on bacterial colonization and biofilm formation. The inhibitory effect was substantially weaker for mammalian cells, indicating some selectivity in the protection provided by the coating.
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Affiliation(s)
- Xingda An
- Department of Chemistry, Boston University, Boston, MA, 02215, USA.
- The Photonics Center, Boston University, Boston, MA, 02215, USA
| | - Ronghai Cheng
- Department of Chemistry, Boston University, Boston, MA, 02215, USA.
| | - Pinghua Liu
- Department of Chemistry, Boston University, Boston, MA, 02215, USA.
| | - Björn M Reinhard
- Department of Chemistry, Boston University, Boston, MA, 02215, USA.
- The Photonics Center, Boston University, Boston, MA, 02215, USA
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He Y, Yin M, Sun J, Chen J, Jiao K, Wen J, Chen Y, Wang B, Gao F, Wang L. Excellent catalytic properties of luminescent Cu@Cu 2S nanozymes and their antibacterial applications. Chem Commun (Camb) 2022; 58:2995-2998. [PMID: 35147143 DOI: 10.1039/d1cc06671d] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Luminescent Cu@Cu2S nanozymes have been prepared by a one-pot method, displaying high peroxidase-like and oxidase-like activity. Fluorescence images show that these nanozymes adhere to the surface of the bacterial cell and scanning electron microscopy reveals that the nanomaterials cause folding and collapse of the bacterial surface, resulting in bacterial death.
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Affiliation(s)
- Yuezhen He
- College of Chemistry and Materials Science, Anhui Normal University, Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Laboratory of Molecular-Based Materials, Anhui Key Laboratory of Chemo-Biosensing, Wuhu 241002, China.
| | - Manyue Yin
- College of Chemistry and Materials Science, Anhui Normal University, Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Laboratory of Molecular-Based Materials, Anhui Key Laboratory of Chemo-Biosensing, Wuhu 241002, China.
| | - Jian Sun
- College of Chemistry and Materials Science, Anhui Normal University, Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Laboratory of Molecular-Based Materials, Anhui Key Laboratory of Chemo-Biosensing, Wuhu 241002, China.
| | - Jie Chen
- College of Life Sciences, Anhui Normal University, Anhui Provincial Key Laboratory of Molecular Enzymology and Mechanism of Major Diseases and Key Laboratory of Biomedicine in Gene Diseases and Health of Anhui Higher Education Institutes, Wuhu 241000, China.
| | - Kuimin Jiao
- College of Chemistry and Materials Science, Anhui Normal University, Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Laboratory of Molecular-Based Materials, Anhui Key Laboratory of Chemo-Biosensing, Wuhu 241002, China.
| | - Jiantao Wen
- College of Chemistry and Materials Science, Anhui Normal University, Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Laboratory of Molecular-Based Materials, Anhui Key Laboratory of Chemo-Biosensing, Wuhu 241002, China.
| | - Yan Chen
- College of Chemistry and Materials Science, Anhui Normal University, Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Laboratory of Molecular-Based Materials, Anhui Key Laboratory of Chemo-Biosensing, Wuhu 241002, China.
| | - Baojuan Wang
- College of Life Sciences, Anhui Normal University, Anhui Provincial Key Laboratory of Molecular Enzymology and Mechanism of Major Diseases and Key Laboratory of Biomedicine in Gene Diseases and Health of Anhui Higher Education Institutes, Wuhu 241000, China.
| | - Feng Gao
- College of Chemistry and Materials Science, Anhui Normal University, Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Laboratory of Molecular-Based Materials, Anhui Key Laboratory of Chemo-Biosensing, Wuhu 241002, China.
| | - Lun Wang
- College of Chemistry and Materials Science, Anhui Normal University, Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Laboratory of Molecular-Based Materials, Anhui Key Laboratory of Chemo-Biosensing, Wuhu 241002, China.
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Reinhard BM. Plasmonic Enhancement Strategies for Light-Driven Microbe Inactivation. THE JOURNAL OF PHYSICAL CHEMISTRY. C, NANOMATERIALS AND INTERFACES 2022; 126:2325-2335. [PMID: 36313122 PMCID: PMC9611023 DOI: 10.1021/acs.jpcc.1c09951] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Light can be an effective antimicrobial. UV-C light, in particular, is now commonly used to sterilize inanimate surfaces, water, and even air. Highly energetic light can, however, also lead to unwanted photodamage and be hazardous. Consequently, conventional light-mediated microbe inactivation is not suitable for all applications. Plasmonic nanostructures can enhance electromagnetic fields in the visible range of the electromagnetic spectrum and show unique light-induced responses that can drive strong antimicrobial effects even for wavelengths that without plasmonic enhancement have little to no antimicrobial impact. Plasmonic nanostructures offer thus a potential strategy to expand the antimicrobial effect of light to wavelength and intensity ranges in which light-associated collateral damages are lower. This Perspective examines selected plasmon-enhanced antimicrobial strategies, elucidates the underlying physico-chemical mechanisms, and discusses applications.
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Affiliation(s)
- Björn M. Reinhard
- Department of Chemistry, Boston University, Boston, MA 02215, United States
- The Photonics Center, Boston University, Boston, MA 02215, United States
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Li J, Ma R, Wu Z, He S, Chen Y, Bai R, Wang J. Visible-Light-Driven Ag-Modified TiO 2 Thin Films Anchored on Bamboo Material with Antifungal Memory Activity against Aspergillus niger. J Fungi (Basel) 2021; 7:jof7080592. [PMID: 34436131 PMCID: PMC8397055 DOI: 10.3390/jof7080592] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2021] [Revised: 07/14/2021] [Accepted: 07/15/2021] [Indexed: 11/16/2022] Open
Abstract
A round-the-clock photocatalyst with energy-storage ability has piqued the interest of researchers for removing microbial contaminants from indoor environments. This work presents a moderate round-the-clock method for inhibiting the growth of fungus spores on bamboo materials using Ag-modified TiO2 thin films. Photoactivated antifungal coating with catalytic memory activity was assembled on a hydrophilic bamboo by first anchoring anatase TiO2 thin films (TB) via hydrogen bonding and then decorating them with Ag nanoparticles (ATB) via electrostatic interactions. Antifungal test results show that the Ag/TiO2 composite films grown on the bamboo surface produced a synergistic antifungal mechanism under both light and dark conditions. Interestingly, post-illumination catalytic memory was observed for ATB, as demonstrated by the inhibition of Aspergillus niger (A. niger) spores, in the dark after visible light was removed, which could be attributed to the transfer of photoexcited electrons from TiO2 to Ag, their trapping on Ag under visible-light illumination, and their release in the dark after visible light was removed. The mechanism study revealed that the immobilized Ag nanoparticles served the role of “killing two birds with one stone”: increasing visible-light absorption through surface plasmon resonance, preventing photogenerated electron–hole recombination by trapping electrons, and contributing to the generation of ●O2−and ●OH. This discovery creates a pathway for the continuous removal of indoor air pollutants such as volatile organic compounds, bacteria, and fungus in the day and night time.
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Affiliation(s)
- Jingpeng Li
- Key Laboratory of High Efficient Processing of Bamboo of Zhejiang Province, China National Bamboo Research Center, Hangzhou 310012, China; (R.M.); (Z.W.); (S.H.); (Y.C.); (R.B.)
- Correspondence: (J.L.); (J.W.)
| | - Rumin Ma
- Key Laboratory of High Efficient Processing of Bamboo of Zhejiang Province, China National Bamboo Research Center, Hangzhou 310012, China; (R.M.); (Z.W.); (S.H.); (Y.C.); (R.B.)
| | - Zaixing Wu
- Key Laboratory of High Efficient Processing of Bamboo of Zhejiang Province, China National Bamboo Research Center, Hangzhou 310012, China; (R.M.); (Z.W.); (S.H.); (Y.C.); (R.B.)
| | - Sheng He
- Key Laboratory of High Efficient Processing of Bamboo of Zhejiang Province, China National Bamboo Research Center, Hangzhou 310012, China; (R.M.); (Z.W.); (S.H.); (Y.C.); (R.B.)
| | - Yuhe Chen
- Key Laboratory of High Efficient Processing of Bamboo of Zhejiang Province, China National Bamboo Research Center, Hangzhou 310012, China; (R.M.); (Z.W.); (S.H.); (Y.C.); (R.B.)
| | - Ruihua Bai
- Key Laboratory of High Efficient Processing of Bamboo of Zhejiang Province, China National Bamboo Research Center, Hangzhou 310012, China; (R.M.); (Z.W.); (S.H.); (Y.C.); (R.B.)
| | - Jin Wang
- Zhejiang Provincial Key Lab of Biological and Chemical Utilizing of Forest Resources, Zhejiang Academy of Forestry, Hangzhou 310023, China
- Correspondence: (J.L.); (J.W.)
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