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V Cabral F, Xu Q, Greer A, Lyons AM, Hasan T. Superhydrophobic Dressing for Singlet Oxygen Delivery in Antimicrobial Photodynamic Therapy against Multidrug-Resistant Bacterial Biofilms. ACS APPLIED BIO MATERIALS 2024. [PMID: 39166743 DOI: 10.1021/acsabm.4c00733] [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: 08/23/2024]
Abstract
The rise of antimicrobial resistance poses a critical public health threat worldwide. While antimicrobial photodynamic therapy (aPDT) has demonstrated efficacy against multidrug-resistant (MDR) bacteria, its effectiveness can be limited by several factors, including the delivery of the photosensitizer (PS) to the site of interest and the development of bacterial resistance to PS uptake. There is a need for alternative methods, one of which is superhydrophobic antimicrobial photodynamic therapy (SH-aPDT), which we report here. SH-aPDT is a technique that isolates the PS on a superhydrophobic (SH) membrane, generating airborne singlet oxygen (1O2) that can diffuse up to 1 mm away from the membrane. In this study, we developed a SH polydimethylsiloxane dressing coated with PS verteporfin. These dressings contain air channels called a plastron for supplying oxygen for aPDT and are designed so that there is no direct contact of the PS with the tissue. Our investigation focuses on the efficacy of SH-aPDT on biofilms formed by drug-sensitive and MDR strains of Gram-positive (Staphylococcus aureus and S. aureus methicillin-resistant) and Gram-negative bacteria (Pseudomonas aeruginosa and P. aeruginosa carbapenem-resistant). SH-aPDT reduces bacterial biofilms by approximately 3 log with a concomitant decrease in their metabolism as measured by MTT. Additionally, the treatment disrupted extracellular polymeric substances, leading to a decrease in biomass and biofilm thickness. This innovative SH-aPDT approach holds great potential for combating antimicrobial resistance, offering an effective strategy to address the challenges posed by drug-resistant wound infections.
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Affiliation(s)
- Fernanda V Cabral
- Wellman Center for Photomedicine, Massachusetts General Hospital and Harvard Medical School, 40 Blossom Street, Boston, Massachusetts 02114, United States
| | - QianFeng Xu
- SingletO2 Therapeutics LLC, VentureLink, Room 524B, 211 Warren Street, Newark, New Jersey 07103, United States
| | - Alexander Greer
- SingletO2 Therapeutics LLC, VentureLink, Room 524B, 211 Warren Street, Newark, New Jersey 07103, United States
- Ph.D. Program in Chemistry, The Graduate Center of the City University of New York, 365 Fifth Avenue, New York, New York 10016, United States
- Department of Chemistry, Brooklyn College, City University of New York, Brooklyn, New York 11210, United States
| | - Alan M Lyons
- SingletO2 Therapeutics LLC, VentureLink, Room 524B, 211 Warren Street, Newark, New Jersey 07103, United States
- Ph.D. Program in Chemistry, The Graduate Center of the City University of New York, 365 Fifth Avenue, New York, New York 10016, United States
- Department of Chemistry, College of Staten Island, City University of New York, Staten Island, New York 10314, United States
| | - Tayyaba Hasan
- Wellman Center for Photomedicine, Massachusetts General Hospital and Harvard Medical School, 40 Blossom Street, Boston, Massachusetts 02114, United States
- Division of Health Sciences and Technology, Harvard University and Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
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2
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Ihalagedara HB, Xu Q, Greer A, Lyons AM. Singlet oxygen generation on a superhydrophobic surface: Effect of photosensitizer coating and incident wavelength on 1O 2 yields. Photochem Photobiol 2024. [PMID: 38824412 DOI: 10.1111/php.13969] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2024] [Accepted: 05/02/2024] [Indexed: 06/03/2024]
Abstract
Photochemical generation of singlet oxygen (1O2) often relies on homogenous systems; however, a dissolved photosensitizer (PS) may be unsuitable for some applications because it is difficult to recover, expensive to replenish, and hazardous to the environment. Isolation of the PS onto a solid support can overcome these limitations, but implementation faces other challenges, including agglomeration of the solid PS, physical quenching of 1O2 by the support, photooxidation of the PS, and hypoxic environments. Here, we explore a superhydrophobic polydimethylsiloxane (SH-PDMS) support coated with the photosensitizer 5,10,15,20-tetrakis(pentafluorophenyl)-21H,23H-porphyrin (TFPP). This approach seeks to address the challenges of a heterogeneous system by using a support that exhibits low 1O2 physical quenching rates, a fluorinated PS that is chemically resistant to photooxidation, and a superhydrophobic surface that entraps a layer of air, thus preventing hypoxia. Absorbance and fluorescence spectroscopy reveal the monomeric arrangement of TFPP on SH-PDMS surfaces, a surprising but favorable characteristic for a solid-phase PS on 1O2 yields. We also investigated the effect of incident wavelength on 1O2 yields for TFPP in aqueous solution and immobilized on SH-PDMS and found overall yields to be dependent on the absorption coefficient, while the yield per absorbed photon exhibited wavelength independence, in accordance with Kasha-Vavilov's rule.
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Affiliation(s)
- Hasanuwan B Ihalagedara
- The Graduate Center of the City University of New York, New York, New York, USA
- Department of Chemistry, College of Staten Island, City University of New York, New York, New York, USA
| | - QianFeng Xu
- Department of Chemistry, College of Staten Island, City University of New York, New York, New York, USA
- SingletO2 Therapeutics LLC, Newark, New Jersey, USA
| | - Alexander Greer
- The Graduate Center of the City University of New York, New York, New York, USA
- SingletO2 Therapeutics LLC, Newark, New Jersey, USA
- Department of Chemistry, Brooklyn College, City University of New York, Brooklyn, New York, USA
| | - Alan M Lyons
- The Graduate Center of the City University of New York, New York, New York, USA
- Department of Chemistry, College of Staten Island, City University of New York, New York, New York, USA
- SingletO2 Therapeutics LLC, Newark, New Jersey, USA
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3
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Tonon CC, de Souza Rastelli AN, Bodahandi C, Ghosh G, Hasan T, Xu Q, Greer A, Lyons AM. Superhydrophobic Tipped Antimicrobial Photodynamic Therapy Device for the In Vivo Treatment of Periodontitis Using a Wistar Rat Model. ACS APPLIED MATERIALS & INTERFACES 2023; 15:50083-50094. [PMID: 37862708 PMCID: PMC10800031 DOI: 10.1021/acsami.3c12820] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/22/2023]
Abstract
Limited options exist for treatment of periodontitis; scaling and root planing (SRP) are not sufficient to eradicate P. gingivalis and the resulting inflammatory disease. Chlorhexidine (CHX), used as an adjuvant to SRP, may reduce bacterial loads but leads to pain and staining, while evidence for its efficacy is lacking. Antibiotics are effective but can lead to drug-resistance. The rising concern of antibiotic resistance limits the future use of this treatment approach. This study evaluates the efficacy of a novel superhydrophobic (SH) antimicrobial photodynamic therapy (aPDT) device as an adjuvant to SRP for the treatment of periodontitis induced in a Wistar rat in vivo model relative to CHX. The SH-aPDT device comprises an SH silicone rubber strip coated with verteporfin photosensitizer (PS), sterilized, and secured onto a tapered plastic optical fiber tip connected to a red diode laser. The superhydrophobic polydimethylsiloxane (PDMS) strips were fabricated by using a novel soluble template method that creates a medical-grade elastomer with hierarchical surface roughness without the use of nanoparticles. Superhydrophobicity minimizes direct contact of the PS-coated surface with bacterial biofilms. Upon insertion of the device tip into the pocket and energizing the laser, the device generates singlet oxygen that effectively targets and eliminates bacteria within the periodontal pocket. SH-aPDT treatment using 125 J/cm2 of red light on three consecutive days reduced P. gingivalis significantly more than SRP-CHX controls (p < 0.05). Clinical parameters significantly improved (p < 0.05), and histology and stereometry results demonstrated SH-aPDT to be the most effective treatment for improving healing and reducing inflammation, with an increase in fibroblast cells and extracellular matrix and a reduction in vascularization, inflammatory cells, and COX-2 expression. The SH-aPDT approach resulted in complete disease clearance assessed 30 days after treatment initiation with significant reduction of the periodontal pocket and re-formation of the junctional epithelium at the enamel-cementum junction. PS isolation on a SH strip minimizes the potential for bacteria to develop resistance, where the treatment may be aided by the oxygen supply retained within the SH surface.
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Affiliation(s)
- Caroline Coradi Tonon
- Wellman Center for Photomedicine, Massachusetts General Hospital and Harvard Medical School, 40 Blossom St, Boston, MA 02114, United States
| | - Alessandra Nara de Souza Rastelli
- Department of Restorative Dentistry, School of Dentistry, Araraquara, Sao Paulo State University-UNESP, 1680 Humaita St., Araraquara, SP 14801-903, Brazil
| | - Chathuna Bodahandi
- Ph.D. Program in Chemistry, The Graduate Center of the City University of New York, 365 Fifth Avenue, New York, NY 10016, United States
- Department of Chemistry, College of Staten Island, City University of New York, Staten Island, New York 10314, United States
| | - Goutam Ghosh
- SingletO2 Therapeutics LLC, VentureLink, Room 524B, 211 Warren St, Newark, NJ 07103, United States
| | - Tayyaba Hasan
- Wellman Center for Photomedicine, Massachusetts General Hospital and Harvard Medical School, 40 Blossom St, Boston, MA 02114, United States
- Division of Health Sciences and Technology, Harvard University and Massachusetts Institute of Technology, Cambridge, MA 02139, United States
| | - QianFeng Xu
- SingletO2 Therapeutics LLC, VentureLink, Room 524B, 211 Warren St, Newark, NJ 07103, United States
| | - Alexander Greer
- Ph.D. Program in Chemistry, The Graduate Center of the City University of New York, 365 Fifth Avenue, New York, NY 10016, United States
- SingletO2 Therapeutics LLC, VentureLink, Room 524B, 211 Warren St, Newark, NJ 07103, United States
- Department of Chemistry, Brooklyn College, City University of New York, Brooklyn, NY 11210, United States
| | - Alan M. Lyons
- Ph.D. Program in Chemistry, The Graduate Center of the City University of New York, 365 Fifth Avenue, New York, NY 10016, United States
- Department of Chemistry, College of Staten Island, City University of New York, Staten Island, New York 10314, United States
- SingletO2 Therapeutics LLC, VentureLink, Room 524B, 211 Warren St, Newark, NJ 07103, United States
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4
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Tonon CC, Ashraf S, de Souza Rastelli AN, Ghosh G, Hasan T, Xu Q, Greer A, Lyons AM. Evaluation of photosensitizer-containing superhydrophobic surfaces for the antibacterial treatment of periodontal biofilms. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY. B, BIOLOGY 2022; 233:112458. [PMID: 35691161 PMCID: PMC10373426 DOI: 10.1016/j.jphotobiol.2022.112458] [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: 03/09/2022] [Revised: 04/18/2022] [Accepted: 04/22/2022] [Indexed: 06/15/2023]
Abstract
Antimicrobial photodynamic therapy (aPDT) is a promising approach to control biofilms involved in periodontal diseases. However, certain challenges, such as staining of teeth, preferential interaction of photosensitizer (PS) with Gram-positive versus Gram-negative bacteria, and insufficient oxygen in hypoxic periodontal pockets have presented barriers to its use in the clinic. To overcome these challenges, a novel superhydrophobic (SH) film that generates airborne singlet oxygen has been developed. The SH-aPDT approach isolates the PS onto a topologically rough solid SH film on which channels allow air to diffuse to the PS surface, thus ensuring sufficient oxygen supply. Upon illumination, gas phase singlet oxygen (1O2) is produced and diffuses from the SH surface to the underlying biofilm. The killing efficacy was assessed as a function of transmitted fluence (17.9-89.5 J/cm2) and chorin e6 loading (96-1110 nmol/cm2) by counting of colony forming units, biofilm metabolism by XTT and confocal microscopy. The decrease in viability of both Gram-positive and Gram-negative bacteria in a multi-species biofilm was found to be linearly dependent on the fluence as well as the loading of the PS up to 71.6 J/cm2 when 1110 nmols/cm2 of chlorin e6 was used. A > 4.6 log bacterial reduction was observed under these conditions (p < 0.05). This novel SH-aPDT approach shows promise as an effective method to disinfect multi-species bacterial biofilms associated with periodontal disease and will be evaluated in animal models in future studies.
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Affiliation(s)
- Caroline Coradi Tonon
- Wellman Center for Photomedicine, Massachusetts General Hospital and Harvard Medical School, 40 Blossom St, Boston, MA 02114, United States
| | - Shoaib Ashraf
- Wellman Center for Photomedicine, Massachusetts General Hospital and Harvard Medical School, 40 Blossom St, Boston, MA 02114, United States
| | - Alessandra Nara de Souza Rastelli
- Department of Restorative Dentistry, School of Dentistry, Araraquara, São Paulo State University-UNESP, 1680 Humaitá St., Araraquara, SP 14801-903, Brazil
| | - Goutam Ghosh
- SingletO(2) Therapeutics LLC, TechBox, Suite 3, 75 Clinton St, Staten Island, NY 10304, United States
| | - Tayyaba Hasan
- Wellman Center for Photomedicine, Massachusetts General Hospital and Harvard Medical School, 40 Blossom St, Boston, MA 02114, United States; Division of Health Sciences and Technology, Harvard University and Massachusetts Institute of Technology, Cambridge, MA 02139, United States
| | - QianFeng Xu
- SingletO(2) Therapeutics LLC, TechBox, Suite 3, 75 Clinton St, Staten Island, NY 10304, United States
| | - Alexander Greer
- SingletO(2) Therapeutics LLC, TechBox, Suite 3, 75 Clinton St, Staten Island, NY 10304, United States; Ph.D. Program in Chemistry, The Graduate Center of the City University of New York, 365 Fifth Avenue, New York, NY 10016, United States; Department of Chemistry, Brooklyn College, City University of New York, Brooklyn, NY 11210, United States.
| | - Alan M Lyons
- SingletO(2) Therapeutics LLC, TechBox, Suite 3, 75 Clinton St, Staten Island, NY 10304, United States; Department of Chemistry, College of Staten Island, City University of New York, Staten Island, New York 10314, United States; Ph.D. Program in Chemistry, The Graduate Center of the City University of New York, 365 Fifth Avenue, New York, NY 10016, United States.
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5
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Tang Z, Wang P, Xu B, Meng L, Jiang L, Liu H. Bioinspired Robust Water Repellency in High Humidity by Micro-meter-Scaled Conical Fibers: Toward a Long-Time Underwater Aerobic Reaction. J Am Chem Soc 2022; 144:10950-10957. [PMID: 35617313 DOI: 10.1021/jacs.2c03860] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Superhydrophobic surfaces have suffered from being frequently penetrated by micro-/nano-droplets in high humidity, which severely deteriorates their water repellency. So far, various biological models for the high water repellency have been reported, which, however, focused mostly on the structural topology with less attention on the dimension character. Here, we revealed a common dimension character of the superhydrophobic fibrous structures of both Gerris legs and Argyroneta abdomens, featured as the conical topology and the micro-meter-scaled cylindrical diameter. In particular, it can be expressed by using a parameter of rp/l > 0.75 μm (r, l, and p are the radius, length, and apex spacing between fibers, respectively). Drawing inspiration, we developed a superhydrophobic micro-meter-scaled conical fiber array with a rather high rp/l value of 0.85 μm, which endows ultra-high water repellency even in high humidity. The micro-meter-scale asymmetric confined space between fibers enables generating a big difference in the Laplace pressure enough to propel the condensed dews away, while the tips help pin the air pocket underwater with a rather long life over 41 days. Taking advantage, we demonstrated a sustainable underwater aerobic reaction where oxygen was continuously supplied from the trapped air pocket by a gradually diffusing process. As a parameter describing both the dimension character and structural topology, the rp/l offers a new perspective for fabricating superhydrophobic fibrous materials with robust water repellency in high humidity, which inspires the innovative underwater devices with a robust anti-wetting performance.
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Affiliation(s)
- Zhongxue Tang
- Research Institute for Frontier Science, School of Physics, Beihang University, No. 37, Xueyuan Road, Haidian District, Beijing 100191, P. R. China.,Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education, School of Chemistry, Beihang University, No. 37, Xueyuan Road, Haidian District, Beijing 100191, P. R. China
| | - Pengwei Wang
- Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education, School of Chemistry, Beihang University, No. 37, Xueyuan Road, Haidian District, Beijing 100191, P. R. China
| | - Bojie Xu
- Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education, School of Chemistry, Beihang University, No. 37, Xueyuan Road, Haidian District, Beijing 100191, P. R. China
| | - Lili Meng
- Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education, School of Chemistry, Beihang University, No. 37, Xueyuan Road, Haidian District, Beijing 100191, P. R. China.,Ji Hua Laboratory, Foshan 528000, Guangdong, P. R. China
| | - Lei Jiang
- Research Institute for Frontier Science, School of Physics, Beihang University, No. 37, Xueyuan Road, Haidian District, Beijing 100191, P. R. China.,Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education, School of Chemistry, Beihang University, No. 37, Xueyuan Road, Haidian District, Beijing 100191, P. R. China.,Ji Hua Laboratory, Foshan 528000, Guangdong, P. R. China
| | - Huan Liu
- Research Institute for Frontier Science, School of Physics, Beihang University, No. 37, Xueyuan Road, Haidian District, Beijing 100191, P. R. China.,Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education, School of Chemistry, Beihang University, No. 37, Xueyuan Road, Haidian District, Beijing 100191, P. R. China.,Ji Hua Laboratory, Foshan 528000, Guangdong, P. R. China
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6
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Recoverable underwater superhydrophobicity from a fully wetted state via dynamic air spreading. iScience 2021; 24:103427. [PMID: 34877492 PMCID: PMC8633030 DOI: 10.1016/j.isci.2021.103427] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2021] [Revised: 10/06/2021] [Accepted: 11/07/2021] [Indexed: 11/24/2022] Open
Abstract
Maintaining the superhydrophobicity underwater offers drag resistance reduction, antifouling, anti-corrosion, noise reduction, and gas collection for boat hulls and submarine vehicles. However, superhydrophobicity typically does not last long underwater since the Cassie state is metastable. Here, we report a reversible and localized recovery of superhydrophobicity from the fully wetted state via air bubble spreading. Composed of sparse fluorinated chained nanoparticles, the submerged surface shows super-low energy barrier for bubble attachment. Especially the recovered plastron exhibits excellent longevity. Based on a simplified, truncated nanocone model, the dynamic spreading of bubbles is analyzed considering two basic parameters, i.e., surface geometric structure and surface energy (which appeared as intrinsic water contact angle). Numerical simulation results via COMSOL confirms the effect of geometric structure on bubble spreading. This investigation will not only offer new insights for the design of robust recoverable superhydrophobic surfaces but also broaden the applications of superhydrophobic coatings. Superhydrophobicity is recovered from fully wetted state in submerged system The dynamic spreading of bubbles is theoretically analyzed The geometric criteria provide direction in designing superhydrophobic surfaces
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Tonon CC, Ashraf S, Alburquerque JQ, de Souza Rastelli AN, Hasan T, Lyons AM, Greer A. Antimicrobial Photodynamic Inactivation Using Topical and Superhydrophobic Sensitizer Techniques: A Perspective from Diffusion in Biofilms †. Photochem Photobiol 2021; 97:1266-1277. [PMID: 34097752 PMCID: PMC10375486 DOI: 10.1111/php.13461] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Accepted: 06/04/2021] [Indexed: 12/14/2022]
Abstract
This review describes nanoparticle and dye diffusion in bacterial biofilms in the context of antimicrobial photodynamic inactivation (aPDI). aPDI requires the diffusion of a photosensitizer (Sens) into the biofilm and subsequent photoactivation of oxygen for the generation of reactive oxygen species (ROS) that inactivate microbes. Molecular diffusion in biofilms has been long investigated, whereas this review is intended to draw a logical link between diffusion in biofilms and ROS, a combination that leads to the current state of aPDI and superhydrophobic aPDI (SH-aPDI). This review should be of interest to photochemists, photobiologists and researchers in material and antimicrobial sciences as is ties together conventional aPDI with the emerging subject of SH-aPDI.
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Affiliation(s)
- Caroline Coradi Tonon
- Wellman Center for Photomedicine, Massachusetts General Hospital and Harvard Medical School, Boston, MA, USA
| | - Shoaib Ashraf
- Wellman Center for Photomedicine, Massachusetts General Hospital and Harvard Medical School, Boston, MA, USA
| | - José Quílez Alburquerque
- Wellman Center for Photomedicine, Massachusetts General Hospital and Harvard Medical School, Boston, MA, USA.,Department of Organic Chemistry, Faculty of Chemistry, Complutense University of Madrid (UCM), Madrid, Spain
| | - Alessandra Nara de Souza Rastelli
- Wellman Center for Photomedicine, Massachusetts General Hospital and Harvard Medical School, Boston, MA, USA.,Department of Restorative Dentistry, School of Dentistry, São Paulo State University-UNESP, Araraquara, SP, Brazil
| | - Tayyaba Hasan
- Wellman Center for Photomedicine, Massachusetts General Hospital and Harvard Medical School, Boston, MA, USA.,Division of Health Sciences and Technology, Harvard University and Massachusetts Institute of Technology, Cambridge, MA, USA
| | - Alan M Lyons
- Department of Chemistry, College of Staten Island, City University of New York, Staten Island, NY, USA.,Ph.D. Program in Chemistry, The Graduate Center of the City University of New York, New York, NY, USA.,SingletO2 Therapeutics LLC, New York, NY, USA
| | - Alexander Greer
- Ph.D. Program in Chemistry, The Graduate Center of the City University of New York, New York, NY, USA.,SingletO2 Therapeutics LLC, New York, NY, USA.,Department of Chemistry, Brooklyn College, City University of New York, Brooklyn, NY, USA
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8
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Alternative methods of photodynamic therapy and oxygen consumption measurements-A review. Biomed Pharmacother 2020; 134:111095. [PMID: 33341048 DOI: 10.1016/j.biopha.2020.111095] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2020] [Revised: 11/14/2020] [Accepted: 11/20/2020] [Indexed: 12/21/2022] Open
Abstract
Photooxidation generates reactive oxygen species (ROS) through the interaction of dyes or surfaces with light radiation of appropriate wavelength. The reaction is of wide utility and is highly effective in photodynamic therapy (PDT) of various types of cancer and skin disease. Understanding generation of singlet oxygen has contributed to the development of PDT and its subsequent use in vivo. However, this therapy has some limitations that prevent its use in the treatment of cancers located deep within the body. The limited depth of light penetration through biological tissue limits initiation of PDT action in deep tissue. Measurement of oxygen photo consumption is critical due to tumor hypoxia, and use of magnetic resonance imaging (MRI) is particularly attractive since it is non-invasive. This article presents bioluminescence (BL) and chemiluminescence (CL) phenomena based on publications from the last 20 years, and preliminary results from our lab in the use of MRI to measure oxygen concentration in water. Current work is aimed at improving the effectiveness of singlet oxygen delivery to deep tissue cancer.
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9
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Aebisher D, Bartusik-Aebisher D, Belh SJ, Ghosh G, Durantini AM, Liu Y, Xu Q, Lyons AM, Greer A. Superhydrophobic Surfaces as a Source of Airborne Singlet Oxygen through Free Space for Photodynamic Therapy. ACS APPLIED BIO MATERIALS 2020; 3:2370-2377. [DOI: 10.1021/acsabm.0c00114] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- David Aebisher
- Faculty of Medicine, University of Rzeszów, 35-310 Rzeszów, Poland
| | | | - Sarah J. Belh
- Department of Chemistry, Brooklyn College, City University of New York, Brooklyn, New York 10314, United States
- Ph.D. Program in Chemistry, Graduate Center of City University of New York, New York, New York 10016, United States
| | - Goutam Ghosh
- Department of Chemistry, Brooklyn College, City University of New York, Brooklyn, New York 10314, United States
- Ph.D. Program in Chemistry, Graduate Center of City University of New York, New York, New York 10016, United States
| | - Andrés M. Durantini
- Department of Chemistry, Brooklyn College, City University of New York, Brooklyn, New York 10314, United States
- IDAS-CONICET, Departamento de Química, Facultad de Ciencias Exactas, Físico-Químicas y Naturales, Universidad Nacional de Río Cuarto, Río Cuarto, Córdoba X5804BYA, Argentina
| | - Yang Liu
- Ph.D. Program in Chemistry, Graduate Center of City University of New York, New York, New York 10016, United States
- Department of Chemistry, College of Staten Island, City University of New York, Staten Island, New York 10314, United States
| | - QianFeng Xu
- Department of Chemistry, College of Staten Island, City University of New York, Staten Island, New York 10314, United States
| | - Alan M. Lyons
- Ph.D. Program in Chemistry, Graduate Center of City University of New York, New York, New York 10016, United States
- Department of Chemistry, College of Staten Island, City University of New York, Staten Island, New York 10314, United States
| | - Alexander Greer
- Department of Chemistry, Brooklyn College, City University of New York, Brooklyn, New York 10314, United States
- Ph.D. Program in Chemistry, Graduate Center of City University of New York, New York, New York 10016, United States
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10
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Tuning the Superhydrophobic Properties of Hierarchical Nano-microstructural Silica Biomorph Arrays Grown at Triphasic Interfaces. Sci Rep 2020; 10:4596. [PMID: 32165719 PMCID: PMC7067859 DOI: 10.1038/s41598-020-61530-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2019] [Accepted: 01/30/2020] [Indexed: 01/07/2023] Open
Abstract
The three-dimensional hierarchical morphology of surfaces greatly affects the wettability, absorption and microfabrication properties of their hybrid materials, however few scalable methods exist that controls simultaneously complex geometric shape and spatial scattered location and their physical properties tuned. Consequently, this report describes a synthetic strategy that enables the position of well-ordered biomorph nano-microstructures on hydrophobic surfaces to be precisely controlled. The hierarchical architecture can be accurately positioned on polydimethylsiloxane (PDMS) surfaces in an unprecedented level by leveraging a solid/liquid/gas triphase dynamic reaction diffusion system strategy. The effect of salt concentrations, pH, CO2 levels, temperature and substrate patterning on this self-assembly process has been investigated, enabling protocols to be devised that enables the hydrophobic properties of the hierarchically assembled multiscale microstructures to be tuned as required. This combined top-down/bottom-up approach can be used to produce composites with outstanding hydrophobicity properties, affording superhydrophobic materials that are capable of retaining water droplets on their surfaces, even when the material is inverted by 180°, with a wide range of potential applications in oil/water separation technology and for selective cell recognition in biological systems.
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11
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Abstract
Gaseous reactant involved heterogeneous catalysis is critical to the development of clean energy, environmental management, health monitoring, and chemical synthesis. However, in traditional heterogeneous catalysis with liquid–solid diphase reaction interfaces, the low solubility and slow transport of gaseous reactants strongly restrict the reaction efficiency. In this minireview, we summarize recent advances in tackling these drawbacks by designing catalytic systems with an air–liquid–solid triphase joint interface. At the triphase interface, abundant gaseous reactants can directly transport from the air phase to the reaction centre to overcome the limitations of low solubility and slow transport of the dissolved gas in liquid–solid diphase reaction systems. By constructing a triphase interface, the efficiency and/or selectivity of photocatalytic reactions, enzymatic reactions, and (photo)electrochemical reactions with consumption of gaseous reactants oxygen, carbon dioxide, and nitrogen are significantly improved. Gaseous reactant involved liquid–solid diphase interface reactions can be significantly enhanced using rationally designed and constructed air–liquid–solid triphase systems.![]()
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Affiliation(s)
- Liping Chen
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University Suzhou 215123 P. R. China
| | - Xinjian Feng
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University Suzhou 215123 P. R. China
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12
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Li Z, Zhu Z, Cao C, Jiang L, Song W. Bioinspired Hollow Nanoreactor: Catalysts that Carry Gaseous Hydrogen for Enhanced Gas‐Liquid‐Solid Three‐Phase Hydrogenation Reactions. ChemCatChem 2019. [DOI: 10.1002/cctc.201902049] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Zhaohua Li
- Beijing National Laboratory for Molecular Sciences CAS Research/Education Center for Excellence in Molecular Sciences CAS Key Laboratory of Molecular Nanostructure and Nanotechnology Institute of ChemistryChinese Academy of Sciences Beijing 100190 P.R. China
- University of Chinese Academy of Sciences 100049 Beijing P.R. China
| | - Zhongpeng Zhu
- University of Chinese Academy of Sciences 100049 Beijing P.R. China
- Key Laboratory of Bio-inspired Materials and Interfacial Science Technical Institute of Physics and ChemistryChinese Academy of Sciences Beijing 100190 P.R. China
| | - Changyan Cao
- Beijing National Laboratory for Molecular Sciences CAS Research/Education Center for Excellence in Molecular Sciences CAS Key Laboratory of Molecular Nanostructure and Nanotechnology Institute of ChemistryChinese Academy of Sciences Beijing 100190 P.R. China
- University of Chinese Academy of Sciences 100049 Beijing P.R. China
| | - Lei Jiang
- University of Chinese Academy of Sciences 100049 Beijing P.R. China
- Key Laboratory of Bio-inspired Materials and Interfacial Science Technical Institute of Physics and ChemistryChinese Academy of Sciences Beijing 100190 P.R. China
| | - Weiguo Song
- Beijing National Laboratory for Molecular Sciences CAS Research/Education Center for Excellence in Molecular Sciences CAS Key Laboratory of Molecular Nanostructure and Nanotechnology Institute of ChemistryChinese Academy of Sciences Beijing 100190 P.R. China
- University of Chinese Academy of Sciences 100049 Beijing P.R. China
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13
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Liao P, Hu J, Wang H, Li J, Zhou Z. Recent advances in surface‐functionalised photosensitive antibacterials with synergistic effects. BIOSURFACE AND BIOTRIBOLOGY 2019. [DOI: 10.1049/bsbt.2019.0005] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Affiliation(s)
- Peizi Liao
- Key Laboratory of Advanced Technologies of Materials (Ministry of Education)School of Materials Science and EngineeringSouthwest Jiaotong UniversityChengdu610031People's Republic of China
| | - Jiahao Hu
- Key Laboratory of Advanced Technologies of Materials (Ministry of Education)School of Materials Science and EngineeringSouthwest Jiaotong UniversityChengdu610031People's Republic of China
| | - Huagao Wang
- Key Laboratory of Advanced Technologies of Materials (Ministry of Education)School of Materials Science and EngineeringSouthwest Jiaotong UniversityChengdu610031People's Republic of China
| | - Jinyang Li
- Key Laboratory of Advanced Technologies of Materials (Ministry of Education)School of Materials Science and EngineeringSouthwest Jiaotong UniversityChengdu610031People's Republic of China
| | - Zuowan Zhou
- Key Laboratory of Advanced Technologies of Materials (Ministry of Education)School of Materials Science and EngineeringSouthwest Jiaotong UniversityChengdu610031People's Republic of China
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14
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Liu Z, Sheng X, Wang D, Feng X. Efficient Hydrogen Peroxide Generation Utilizing Photocatalytic Oxygen Reduction at a Triphase Interface. iScience 2019; 17:67-73. [PMID: 31255984 PMCID: PMC6606954 DOI: 10.1016/j.isci.2019.06.023] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2019] [Revised: 05/06/2019] [Accepted: 06/12/2019] [Indexed: 01/01/2023] Open
Abstract
Photocatalytic oxygen reduction has garnered attention as an emerging alternative to traditional anthraquinone oxidation process to synthesize H2O2. However, despite great efforts to optimize photocatalyst activity, the formation rate has been largely limited by the deficient accessibility of the photocatalysts to sufficient O2 in water. Here we boost the reaction by reporting an air-liquid-solid triphase photocatalytic system for efficient H2O2 generation. The triphase system allows reactant O2 to reach the reaction interface directly from the ambient atmosphere, greatly increasing the interface O2 concentration, which in turn simultaneously enhanced the kinetics of formation constant and suppressed the unwanted electron-hole recombination and the kinetics of H2O2 decomposition reaction. Compared with a conventional liquid-solid diphase reaction system, the triphase system enables an increase in H2O2 formation by a factor of 44. The triphase system is generally applicable to fundamentally understand and maximize the kinetics of semiconductor-based photocatalytic oxygen reduction for H2O2 generation. A triphase photocatalytic system is developed for efficient H2O2 generation Sufficient interface oxygen is provided The formation rate is enhanced The unwanted electron-hole recombination and H2O2 decomposition rates are suppressed
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Affiliation(s)
- Zhen Liu
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, P. R. China
| | - Xia Sheng
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, P. R. China.
| | - Dandan Wang
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, P. R. China
| | - Xinjian Feng
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, P. R. China.
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15
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Zhu A, Zhang J, Guan F, Tang H, Feng X. Green Approach for Metal Oxide Deposition at an Air-Liquid-Solid Triphase Interface with Enhanced Photocatalytic Activity. ACS OMEGA 2019; 4:3534-3538. [PMID: 31459567 PMCID: PMC6648803 DOI: 10.1021/acsomega.8b03234] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/20/2018] [Accepted: 12/24/2018] [Indexed: 06/10/2023]
Abstract
Bioinspired superhydrophobic substrates have been used in many scientific and technological areas. These substrates can trap atmosphere-linked air pockets at the solid-liquid interface, offering an opportunity to address the oxygen-deficit problem in many reaction systems. Herein, we addressed the oxygen-deficit problem in metal oxide electrochemical deposition by using a triphase electrode possessing an air-liquid-solid joint interface. Oxygen in the interface is directly available from the air phase for sufficient OH- production via oxygen cathodic reaction, thereby offering us a green approach to fabricate two-dimensional mesoporous ZnO nanoarrays over a wide range of current densities. Further, because metal oxides are deposited at the triphase interface, sufficient O2, a natural electron scavenger required in photocatalytic reaction to suppress the recombination of photogenerated electron-hole pairs, can be directly supplied, and we demonstrated their enhanced photocatalytic reaction kinetics in water remediation. The present work highlights a powerful interface-engineering strategy for fabricating metal oxides with unprecedented photocatalytic ability.
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16
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Wu Y, Feng J, Gao H, Feng X, Jiang L. Superwettability-Based Interfacial Chemical Reactions. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2019; 31:e1800718. [PMID: 30592333 DOI: 10.1002/adma.201800718] [Citation(s) in RCA: 80] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/01/2018] [Revised: 10/13/2018] [Indexed: 06/09/2023]
Abstract
Superwetting interfaces arising from the cooperation of surface energy and multiscale micro/nanostructures are extensively studied in biological systems. Fundamental understandings gained from biological interfaces boost the control of wettability under different dimensionalities, such as 2D surfaces, 1D fibers and channels, and 3D architectures, thus permitting manipulation of the transport physics of liquids, gases, and ions, which profoundly impacts chemical reactions and material fabrication. In this context, the progress of new chemistry based on superwetting interfaces is highlighted, beginning with mass transport dynamics, including liquid, gas, and ion transport. In the following sections, the impacts of the superwettability-mediated transport dynamics on chemical reactions and material fabrication is discussed. Superwettability science has greatly enhanced the efficiency of chemical reactions, including photocatalytic, bioelectronic, electrochemical, and organic catalytic reactions, by realizing efficient mass transport. For material fabrication, superwetting interfaces are pivotal in the manipulation of the transport and microfluidic dynamics of liquids on solid surfaces, leading to the spatially regulated growth of low-dimensional single-crystalline arrays and high-quality polymer films. Finally, a perspective on future directions is presented.
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Affiliation(s)
- Yuchen Wu
- Key Laboratory of Bioinspired Smart Interfacial Science, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China
| | - Jiangang Feng
- Key Laboratory of Bioinspired Smart Interfacial Science, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China
- University of Chinese Academy of Science, Beijing, 100049, P. R. China
| | - Hanfei Gao
- Key Laboratory of Bioinspired Smart Interfacial Science, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China
- University of Chinese Academy of Science, Beijing, 100049, P. R. China
| | - Xinjian Feng
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, 215123, P. R. China
| | - Lei Jiang
- Key Laboratory of Bioinspired Smart Interfacial Science, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China
- University of Chinese Academy of Science, Beijing, 100049, P. R. China
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17
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Pushalkar S, Ghosh G, Xu Q, Liu Y, Ghogare AA, Atem C, Greer A, Saxena D, Lyons AM. Superhydrophobic Photosensitizers: Airborne 1O 2 Killing of an in Vitro Oral Biofilm at the Plastron Interface. ACS APPLIED MATERIALS & INTERFACES 2018; 10:25819-25829. [PMID: 29972022 PMCID: PMC6698391 DOI: 10.1021/acsami.8b09439] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Singlet oxygen is a potent agent for the selective killing of a wide range of harmful cells; however, current delivery methods pose significant obstacles to its widespread use as a treatment agent. Limitations include the need for photosensitizer proximity to tissue because of the short (3.5 μs) lifetime of singlet oxygen in contact with water; the strong optical absorption of the photosensitizer, which limits the penetration depth; and hypoxic environments that restrict the concentration of available oxygen. In this article, we describe a novel superhydrophobic singlet oxygen delivery device for the selective inactivation of bacterial biofilms. The device addresses the current limitations by: immobilizing photosensitizer molecules onto inert silica particles; embedding the photosensitizer-containing particles into the plastron (i.e. the fluid-free space within a superhydrophobic surface between the solid substrate and fluid layer); distributing the particles along an optically transparent substrate such that they can be uniformly illuminated; enabling the penetration of oxygen via the contiguous vapor space defined by the plastron; and stabilizing the superhydrophobic state while avoiding the direct contact of the sensitizer to biomaterials. In this way, singlet oxygen generated on the sensitizer-containing particles can diffuse across the plastron and kill bacteria even deep within the hypoxic periodontal pockets. For the first time, we demonstrate complete biofilm inactivation (>5 log killing) of Porphyromonas gingivalis, a bacterium implicated in periodontal disease using the superhydrophobic singlet oxygen delivery device. The biofilms were cultured on hydroxyapatite disks and exposed to active and control surfaces to assess the killing efficiency as monitored by colony counting and confocal microscopy. Two sensitizer particle types, a silicon phthalocyanine sol-gel and a chlorin e6 derivative covalently bound to fluorinated silica, were evaluated; the biofilm killing efficiency was found to correlate with the amount of singlet oxygen detected in separate trapping studies. Finally, we discuss the applications of such devices in the treatment of periodontitis.
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Affiliation(s)
- Smruti Pushalkar
- Department of Basic Sciences and Craniofacial Biology, New York University College of Dentistry, New York 10010, United States
| | - Goutam Ghosh
- Department of Chemistry, Brooklyn College, City University of New York, Brooklyn, New York 11210, United States
| | - QianFeng Xu
- SingletO2 Therapeutics LLC, 215 W 125 St., 4 Floor, New York, NY 10027, United States
| | - Yang Liu
- Department of Chemistry, College of Staten Island, City University of New York, Staten Island, New York 10314, United States
- Ph.D. Program in Chemistry, The Graduate Center of the City University of New York, 365 Fifth Avenue, New York, New York 10016, United States
| | - Ashwini A. Ghogare
- Department of Chemistry, Brooklyn College, City University of New York, Brooklyn, New York 11210, United States
- Ph.D. Program in Chemistry, The Graduate Center of the City University of New York, 365 Fifth Avenue, New York, New York 10016, United States
| | - Cecilia Atem
- Department of Basic Sciences and Craniofacial Biology, New York University College of Dentistry, New York 10010, United States
| | - Alexander Greer
- Department of Chemistry, Brooklyn College, City University of New York, Brooklyn, New York 11210, United States
- Ph.D. Program in Chemistry, The Graduate Center of the City University of New York, 365 Fifth Avenue, New York, New York 10016, United States
- SingletO2 Therapeutics LLC, 215 W 125 St., 4 Floor, New York, NY 10027, United States
| | - Deepak Saxena
- Department of Basic Sciences and Craniofacial Biology, New York University College of Dentistry, New York 10010, United States
| | - Alan M. Lyons
- Department of Chemistry, College of Staten Island, City University of New York, Staten Island, New York 10314, United States
- Ph.D. Program in Chemistry, The Graduate Center of the City University of New York, 365 Fifth Avenue, New York, New York 10016, United States
- SingletO2 Therapeutics LLC, 215 W 125 St., 4 Floor, New York, NY 10027, United States
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18
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Walalawela N, Greer A. Heterogeneous photocatayltic deperoxidation with UV and visible light. J PHYS ORG CHEM 2018. [DOI: 10.1002/poc.3807] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Niluksha Walalawela
- Department of Chemistry; Brooklyn College; New York NY USA
- Ph.D. Program in Chemistry; The Graduate Center of the City University of New York; New York NY USA
| | - Alexander Greer
- Department of Chemistry; Brooklyn College; New York NY USA
- Ph.D. Program in Chemistry; The Graduate Center of the City University of New York; New York NY USA
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19
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Shan WL, Gao WX, Lin YJ, Jin GX. Light-initiated reversible conversion of macrocyclic endoperoxides derived from half-sandwich rhodium-based metallarectangles. Dalton Trans 2018; 47:2769-2777. [DOI: 10.1039/c7dt03962j] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
A series of metallarectangles were synthesized by an anthracene-based ligand and three different half-sandwich rhodium precursors. The photochemical reactions show that these metallarectangles can be reversibly converted to the macrocyclic endoperoxides.
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Affiliation(s)
- Wei-Long Shan
- State Key Laboratory of Molecular Engineering of Polymers
- Collaborative Innovation Center of Chemistry for Energy Materials
- Department of Chemistry
- Fudan University
- Shanghai 200433
| | - Wen-Xi Gao
- State Key Laboratory of Molecular Engineering of Polymers
- Collaborative Innovation Center of Chemistry for Energy Materials
- Department of Chemistry
- Fudan University
- Shanghai 200433
| | - Yue-Jian Lin
- State Key Laboratory of Molecular Engineering of Polymers
- Collaborative Innovation Center of Chemistry for Energy Materials
- Department of Chemistry
- Fudan University
- Shanghai 200433
| | - Guo-Xin Jin
- State Key Laboratory of Molecular Engineering of Polymers
- Collaborative Innovation Center of Chemistry for Energy Materials
- Department of Chemistry
- Fudan University
- Shanghai 200433
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20
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Sheng X, Liu Z, Zeng R, Chen L, Feng X, Jiang L. Enhanced Photocatalytic Reaction at Air–Liquid–Solid Joint Interfaces. J Am Chem Soc 2017; 139:12402-12405. [DOI: 10.1021/jacs.7b07187] [Citation(s) in RCA: 130] [Impact Index Per Article: 18.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Xia Sheng
- College
of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, People’s Republic of China
| | - Zhen Liu
- College
of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, People’s Republic of China
| | - Ruosha Zeng
- College
of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, People’s Republic of China
| | - Liping Chen
- College
of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, People’s Republic of China
| | - Xinjian Feng
- College
of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, People’s Republic of China
| | - Lei Jiang
- School
of Chemistry and Environment, Beihang University, Beijing 100191, People’s Republic of China
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21
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Zhang J, Sheng X, Cheng X, Chen L, Jin J, Feng X. Robust electrochemical metal oxide deposition using an electrode with a superhydrophobic surface. NANOSCALE 2017; 9:87-90. [PMID: 27929194 DOI: 10.1039/c6nr07421a] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Described herein is the first study of metal oxide deposition on an electrode with a solid/liquid/gas triphase reaction interface. Such an electrode enables the formation of a locally high interface pH value that is independent of the bulk conditions, and allows the deposition of a wide variety of metal oxides in a robust electrolyte. The results reveal that the control of electrode surface wettability is of significant importance for the regulation of the electrode-electrolyte local interface environment, which provides a new set of guidelines and perspective for future electrode preparation and application.
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Affiliation(s)
- Jun Zhang
- Division of Nanobionic Research, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou, 215123, China
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22
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Su B, Tian Y, Jiang L. Bioinspired Interfaces with Superwettability: From Materials to Chemistry. J Am Chem Soc 2016; 138:1727-48. [DOI: 10.1021/jacs.5b12728] [Citation(s) in RCA: 790] [Impact Index Per Article: 98.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Bin Su
- Department
of Chemical Engineering, Monash University, Clayton, Victoria 3800, Australia
| | - Ye Tian
- Beijing
National Laboratory for Molecular Sciences, Key Laboratory of Organic
Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China
| | - Lei Jiang
- Laboratory
of Bioinspired Smart Interfacial Science, Technical Institute of Physics
and Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China
- School
of Chemistry and Environment, Beihang University, Beijing 100191, P. R. China
- Department
of Chemical Engineering, Monash University, Clayton, Victoria 3800, Australia
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23
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Yan H, Zhou H, Ye Q, Wang X, Cho CM, Tan AYX, Xu J. Engineering polydimethylsiloxane with two-dimensional graphene oxide for an extremely durable superhydrophobic fabric coating. RSC Adv 2016. [DOI: 10.1039/c6ra14362h] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
A type of nanostructured material comprising reduced graphene oxide (RGO) modified polydimethylsiloxane (PDMS) for fabric coating is described.
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Affiliation(s)
- Hong Yan
- Institute of Materials Research and Engineering (IMRE)
- Agency for Science, Technology and Research (A*STAR)
- Republic of Singapore
| | - Hui Zhou
- Institute of Materials Research and Engineering (IMRE)
- Agency for Science, Technology and Research (A*STAR)
- Republic of Singapore
| | - Qun Ye
- Institute of Materials Research and Engineering (IMRE)
- Agency for Science, Technology and Research (A*STAR)
- Republic of Singapore
| | - Xiaobai Wang
- Institute of Materials Research and Engineering (IMRE)
- Agency for Science, Technology and Research (A*STAR)
- Republic of Singapore
| | - Ching Mui Cho
- Institute of Materials Research and Engineering (IMRE)
- Agency for Science, Technology and Research (A*STAR)
- Republic of Singapore
| | - Angeline Yan Xuan Tan
- Institute of Materials Research and Engineering (IMRE)
- Agency for Science, Technology and Research (A*STAR)
- Republic of Singapore
| | - Jianwei Xu
- Institute of Materials Research and Engineering (IMRE)
- Agency for Science, Technology and Research (A*STAR)
- Republic of Singapore
- Department of Chemistry
- National University of Singapore
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24
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Huynh SH, Lau CY, Cheong BHP, Muradoglu M, Liew OW, Ng TW. Controlled transport of captive bubbles on plastrons. SOFT MATTER 2015; 11:7474-7477. [PMID: 26305149 DOI: 10.1039/c5sm01910a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Captive bubbles that reside on superhydrophobic surfaces with plastrons move uncontrollably when tilted. A system based on creating moveable local apexes on flexible superhydrophobic foils is shown to allow controlled transport. Simulations done reveal that specific bubble transport speeds are needed to form concentration gradients suited for aerotaxis study and sensing.
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Affiliation(s)
- So Hung Huynh
- Laboratory for Optics and Applied Mechanics, Department of Mechanical & Aerospace Engineering, Monash University, Clayton VIC3800, Australia.
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25
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Malek B, Ghogare AA, Choudhury R, Greer A. Air-Water Interface Effects on the Regioselectivity of Singlet Oxygenations of a Trisubstituted Alkene. Tetrahedron Lett 2015; 56:4505-4508. [PMID: 27092011 PMCID: PMC4832427 DOI: 10.1016/j.tetlet.2015.05.111] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
The regioselective synthesis of allylic hydroperoxide sulfonates by singlet oxygenation at the air-water interface has been found to depend on the concentration of the alkene sulfonate and added calcium salt. The regioselectivity is proposed to originate from an orthogonal alkene relative to the water surface for preferential methyl hydrogen abstraction by airborne singlet oxygen in an ene reaction. The findings hint that the air-water interface is a locale for synthetic reactions.
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Affiliation(s)
- Belaid Malek
- Department of Chemistry and Graduate Center, City University of New York–Brooklyn College, Brooklyn, New York 11210, United States
| | - Ashwini A. Ghogare
- Department of Chemistry and Graduate Center, City University of New York–Brooklyn College, Brooklyn, New York 11210, United States
| | - Rajib Choudhury
- Department of Chemistry and Graduate Center, City University of New York–Brooklyn College, Brooklyn, New York 11210, United States
| | - Alexander Greer
- Department of Chemistry and Graduate Center, City University of New York–Brooklyn College, Brooklyn, New York 11210, United States
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26
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Huynh SH, Zahidi AAA, Muradoglu M, Cheong BHP, Ng TW. Plastron-Mediated Growth of Captive Bubbles on Superhydrophobic Surfaces. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2015; 31:6695-6703. [PMID: 25986160 DOI: 10.1021/acs.langmuir.5b00058] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Captive bubbles on a superhydrophobic (SH) surface have been shown to increase in volume via injection of air through the surrounding plastron. The experimental contact diameter against volume trends were found to follow that predicted by the Surface Evolver simulation generally but corresponded with the simulated data at contact angle (CA) = 158° when the volume was 20 μL but that at CA = 170° when the volume was increased to 180 μL. In this regime, there was a simultaneous outward movement of the contact line as well as a small reduction in the slope that the liquid-air interface makes with the horizontal as air was injected. At volumes higher than 180 μL, air injection caused the diameter to reduce progressively until detachment. The inward movement of the contact line in this regime allowed the bubble body to undergo shape deformations to stay attached onto the substrate with larger volumes (300 μL) than predicted (220 μL at CA = 170°) using simulation. In experiments to investigate the effect of translating the SH surface, movement of captive bubbles was possible with 280 μL volume but not with 80 μL volume. This pointed to the possibility of transporting gas-phase samples on SH surfaces using larger captive bubble volumes.
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Affiliation(s)
- So Hung Huynh
- Laboratory for Optics and Applied Mechanics, Department of Mechanical and Aerospace Engineering, Monash University, Clayton, Victoria 3800, Australia
| | - Alifa Afiah Ahmad Zahidi
- Laboratory for Optics and Applied Mechanics, Department of Mechanical and Aerospace Engineering, Monash University, Clayton, Victoria 3800, Australia
| | - Murat Muradoglu
- Laboratory for Optics and Applied Mechanics, Department of Mechanical and Aerospace Engineering, Monash University, Clayton, Victoria 3800, Australia
| | - Brandon Huey-Ping Cheong
- Laboratory for Optics and Applied Mechanics, Department of Mechanical and Aerospace Engineering, Monash University, Clayton, Victoria 3800, Australia
| | - Tuck Wah Ng
- Laboratory for Optics and Applied Mechanics, Department of Mechanical and Aerospace Engineering, Monash University, Clayton, Victoria 3800, Australia
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27
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Gao Y, Chen T, Yamamoto S, Miyashita T, Mitsuishi M. Superhydrophobic porous surfaces: dissolved oxygen sensing. ACS APPLIED MATERIALS & INTERFACES 2015; 7:3468-72. [PMID: 25659178 DOI: 10.1021/am509147h] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
Porous polymer films are necessary for dissolved gas sensor applications that combine high sensitivity with selectivity. This report describes a greatly enhanced dissolved oxygen sensor system consisting of amphiphilic acrylamide-based polymers: poly(N-(1H, 1H-pentadecafluorooctyl)-methacrylamide) (pC7F15MAA) and poly(N-dodecylacrylamide-co-5- [4-(2-methacryloyloxyethoxy-carbonyl)phenyl]-10,15,20-triphenylporphinato platinum(II)) (p(DDA/PtTPP)). The nanoparticle formation capability ensures both superhydrophobicity with a water contact angle greater than 160° and gas permeability so that molecular oxygen enters the film from water. The film was prepared by casting a mixed solution of pC7F15MAA and p(DDA/PtTPP) with AK-225 and acetic acid onto a solid substrate. The film has a porous structure comprising nanoparticle assemblies with diameters of several hundred nanometers. The film shows exceptional performance as the oxygen sensitivity reaches 126: the intensity ratio at two oxygen concentrations (I0/I40) respectively corresponding to dissolved oxygen concentration 0 and 40 (mg L(-1)). Understanding and controlling porous nanostructures are expected to provide opportunities for making selective penetration/separation of molecules occurring at the superhydrophobic surface.
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Affiliation(s)
- Yu Gao
- Institute of Multidisciplinary Research for Advanced Materials, Tohoku University , 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan
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28
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Zhao Y, Liu Y, Xu Q, Barahman M, Lyons AM. Catalytic, self-cleaning surface with stable superhydrophobic properties: printed polydimethylsiloxane (PDMS) arrays embedded with TiO2 nanoparticles. ACS APPLIED MATERIALS & INTERFACES 2015; 7:2632-2640. [PMID: 25525836 DOI: 10.1021/am5076315] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Maintaining the long-term stability of superhydrophobic surfaces is challenging because of contamination from organic molecules and proteins that render the surface hydrophilic. Reactive oxygen species generated on a photocatalyst, such as TiO2, could mitigate this effect by oxidizing these contaminants. However, incorporation of such catalyst particles into a superhydrophobic surface is challenging because the particles become hydrophilic under UV exposure, causing the surface to transition to the Wenzel state. Here we show that a high concentration of hydrophilic TiO2 catalytic nanoparticles can be incorporated into a superhydrophobic surface by partially embedding the particles into a printed array of high aspect ratio polydimethylsiloxane posts. A stable Cassie state was maintained on these surfaces, even under UV irradiation, because of the significant degree of hierarchical roughness. By printing the surface on a porous support, oxygen could be flowed through the plastron, resulting in higher photooxidation rates relative to a static ambient. Rhodamine B and bovine serum albumin were photooxidized both in solution and after drying onto these TiO2-containing surfaces, and the effects of particle location and plastron gas composition were studied in static and flowing gas environments. This approach may prove useful for water purification, medical devices, and other applications where Cassie stability is required in the presence of organic compounds.
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Affiliation(s)
- Yuanyuan Zhao
- Department of Chemistry, College of Staten Island, City University of New York , Staten Island, New York 10314, United States
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Zhao Y, Liu Y, Xu Q, Barahman M, Bartusik D, Greer A, Lyons AM. Singlet oxygen generation on porous superhydrophobic surfaces: effect of gas flow and sensitizer wetting on trapping efficiency. J Phys Chem A 2014; 118:10364-71. [PMID: 24885074 PMCID: PMC4234451 DOI: 10.1021/jp503149x] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
We describe physical-organic studies of singlet oxygen generation and transport into an aqueous solution supported on superhydrophobic surfaces on which silicon-phthalocyanine (Pc) particles are immobilized. Singlet oxygen ((1)O2) was trapped by a water-soluble anthracene compound and monitored in situ using a UV-vis spectrometer. When oxygen flows through the porous superhydrophobic surface, singlet oxygen generated in the plastron (i.e., the gas layer beneath the liquid) is transported into the solution within gas bubbles, thereby increasing the liquid-gas surface area over which singlet oxygen can be trapped. Higher photooxidation rates were achieved in flowing oxygen, as compared to when the gas in the plastron was static. Superhydrophobic surfaces were also synthesized so that the Pc particles were located in contact with, or isolated from, the aqueous solution to evaluate the relative effectiveness of singlet oxygen generated in solution and the gas phase, respectively; singlet oxygen generated on particles wetted by the solution was trapped more efficiently than singlet oxygen generated in the plastron, even in the presence of flowing oxygen gas. A mechanism is proposed that explains how Pc particle wetting, plastron gas composition and flow rate as well as gas saturation of the aqueous solution affect singlet oxygen trapping efficiency. These stable superhydrophobic surfaces, which can physically isolate the photosensitizer particles from the solution may be of practical importance for delivering singlet oxygen for water purification and medical devices.
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Affiliation(s)
- Yuanyuan Zhao
- Department of Chemistry, College of Staten Island, City University of New York , Staten Island, New York 10314, United States
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