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Xiao Y, Pandey K, Nicolás-Boluda A, Onidas D, Nizard P, Carn F, Lucas T, Gateau J, Martin-Molina A, Quesada-Pérez M, Del Mar Ramos-Tejada M, Gazeau F, Luo Y, Mangeney C. Synergic Thermo- and pH-Sensitive Hybrid Microgels Loaded with Fluorescent Dyes and Ultrasmall Gold Nanoparticles for Photoacoustic Imaging and Photothermal Therapy. ACS APPLIED MATERIALS & INTERFACES 2022; 14:54439-54457. [PMID: 36468426 DOI: 10.1021/acsami.2c12796] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Smart microgels (μGels) made of polymeric particles doped with inorganic nanoparticles have emerged recently as promising multifunctional materials for nanomedicine applications. However, the synthesis of these hybrid materials is still a challenging task with the necessity to control several features, such as particle sizes and doping levels, in order to tailor their final properties in relation to the targeted application. We report herein an innovative modular strategy to achieve the rational design of well-defined and densely filled hybrid particles. It is based on the assembly of the different building blocks, i.e., μGels, dyes, and small gold nanoparticles (<4 nm), and the tuning of nanoparticle loading within the polymer matrix through successive incubation steps. The characterization of the final hybrid networks using UV-vis absorption, fluorescence, transmission electron microscopy, dynamic light scattering, and small-angle X-ray scattering revealed that they uniquely combine the properties of hydrogel particles, including high loading capacity and stimuli-responsive behavior, the photoluminescent properties of dyes (rhodamine 6G, methylene blue and cyanine 7.5), and the features of gold nanoparticle assembly. Interestingly, in response to pH and temperature stimuli, the smart hybrid μGels can shrink, leading to the aggregation of the gold nanoparticles trapped inside the polymer matrix. This stimuli-responsive behavior results in plasmon band broadening and red shift toward the near-infrared region (NIR), opening promising prospects in biomedical science. Particularly, the potential of these smart hybrid nanoplatforms for photoactivated hyperthermia, photoacoustic imaging, cellular internalization, intracellular imaging, and photothermal therapy was assessed, demonstrating well controlled multimodal opportunities for theranostics.
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Affiliation(s)
- Yu Xiao
- CNRS Laboratoire de Chimie et de Biochimie Pharmacologiques et Toxicologiques, Université Paris Cité, ParisF-75006, France
| | - Kartikey Pandey
- CNRS Laboratoire de Chimie et de Biochimie Pharmacologiques et Toxicologiques, Université Paris Cité, ParisF-75006, France
| | - Alba Nicolás-Boluda
- CNRS Matière et Systèmes Complexes MSC, Université Paris Cité, ParisF-75006, France
| | - Delphine Onidas
- CNRS Laboratoire de Chimie et de Biochimie Pharmacologiques et Toxicologiques, Université Paris Cité, ParisF-75006, France
| | - Philippe Nizard
- CNRS Laboratoire de Chimie et de Biochimie Pharmacologiques et Toxicologiques, Université Paris Cité, ParisF-75006, France
| | - Florent Carn
- CNRS Matière et Systèmes Complexes MSC, Université Paris Cité, ParisF-75006, France
| | - Théotim Lucas
- CNRS Matière et Systèmes Complexes MSC, Université Paris Cité, ParisF-75006, France
- CNRS, INSERM, Laboratoire d'Imagerie Biomédicale, LIB, Sorbonne Université, ParisF-75006, France
| | - Jérôme Gateau
- CNRS, INSERM, Laboratoire d'Imagerie Biomédicale, LIB, Sorbonne Université, ParisF-75006, France
| | - Alberto Martin-Molina
- Departamento de Física Aplicada, Universidad de Granada, Campus de Fuentenueva s/n, Granada18071, Spain
- Instituto Carlos I de Física Teórica y Computacional, Universidad de Granada, Campus de Fuentenueva s/n, Granada18071, Spain
| | - Manuel Quesada-Pérez
- Departamento de Física, Escuela Politécnica Superior de Linares, Universidad de Jaén, Linares, Jaén23700, Spain
| | - Maria Del Mar Ramos-Tejada
- Departamento de Física, Escuela Politécnica Superior de Linares, Universidad de Jaén, Linares, Jaén23700, Spain
| | - Florence Gazeau
- CNRS Matière et Systèmes Complexes MSC, Université Paris Cité, ParisF-75006, France
| | - Yun Luo
- CNRS Laboratoire de Chimie et de Biochimie Pharmacologiques et Toxicologiques, Université Paris Cité, ParisF-75006, France
| | - Claire Mangeney
- CNRS Laboratoire de Chimie et de Biochimie Pharmacologiques et Toxicologiques, Université Paris Cité, ParisF-75006, France
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Elhassan E, Devnarain N, Mohammed M, Govender T, Omolo CA. Engineering hybrid nanosystems for efficient and targeted delivery against bacterial infections. J Control Release 2022; 351:598-622. [DOI: 10.1016/j.jconrel.2022.09.052] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2022] [Revised: 09/25/2022] [Accepted: 09/25/2022] [Indexed: 11/30/2022]
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Zhao YQ, Xiu Z, Wu R, Zhang L, Ding X, Zhao N, Duan S, Xu FJ. A Near‐Infrared‐Responsive Quaternary Ammonium/Gold Nanorod Hybrid Coating with Enhanced Antibacterial Properties. ADVANCED NANOBIOMED RESEARCH 2022. [DOI: 10.1002/anbr.202200111] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
Affiliation(s)
- Yu-Qing Zhao
- State Key Laboratory of Chemical Resource Engineering Key Lab of Biomedical Materials of Natural Macromolecules (Beijing University of Chemical Technology) Ministry of Education, Beijing Laboratory of Biomedical Materials Beijing Advanced Innovation Center for Soft Matter Science and Engineering Beijing University of Chemical Technology Beijing 100029 China
| | - Zongpeng Xiu
- State Key Laboratory of Chemical Resource Engineering Key Lab of Biomedical Materials of Natural Macromolecules (Beijing University of Chemical Technology) Ministry of Education, Beijing Laboratory of Biomedical Materials Beijing Advanced Innovation Center for Soft Matter Science and Engineering Beijing University of Chemical Technology Beijing 100029 China
| | - Ruonan Wu
- State Key Laboratory of Chemical Resource Engineering Key Lab of Biomedical Materials of Natural Macromolecules (Beijing University of Chemical Technology) Ministry of Education, Beijing Laboratory of Biomedical Materials Beijing Advanced Innovation Center for Soft Matter Science and Engineering Beijing University of Chemical Technology Beijing 100029 China
| | - Lujiao Zhang
- State Key Laboratory of Chemical Resource Engineering Key Lab of Biomedical Materials of Natural Macromolecules (Beijing University of Chemical Technology) Ministry of Education, Beijing Laboratory of Biomedical Materials Beijing Advanced Innovation Center for Soft Matter Science and Engineering Beijing University of Chemical Technology Beijing 100029 China
| | - Xiaokang Ding
- State Key Laboratory of Chemical Resource Engineering Key Lab of Biomedical Materials of Natural Macromolecules (Beijing University of Chemical Technology) Ministry of Education, Beijing Laboratory of Biomedical Materials Beijing Advanced Innovation Center for Soft Matter Science and Engineering Beijing University of Chemical Technology Beijing 100029 China
| | - Nana Zhao
- State Key Laboratory of Chemical Resource Engineering Key Lab of Biomedical Materials of Natural Macromolecules (Beijing University of Chemical Technology) Ministry of Education, Beijing Laboratory of Biomedical Materials Beijing Advanced Innovation Center for Soft Matter Science and Engineering Beijing University of Chemical Technology Beijing 100029 China
| | - Shun Duan
- State Key Laboratory of Chemical Resource Engineering Key Lab of Biomedical Materials of Natural Macromolecules (Beijing University of Chemical Technology) Ministry of Education, Beijing Laboratory of Biomedical Materials Beijing Advanced Innovation Center for Soft Matter Science and Engineering Beijing University of Chemical Technology Beijing 100029 China
| | - Fu-Jian Xu
- State Key Laboratory of Chemical Resource Engineering Key Lab of Biomedical Materials of Natural Macromolecules (Beijing University of Chemical Technology) Ministry of Education, Beijing Laboratory of Biomedical Materials Beijing Advanced Innovation Center for Soft Matter Science and Engineering Beijing University of Chemical Technology Beijing 100029 China
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Ramachandran R, Chen TW, Veerakumar P, Anushya G, Chen SM, Kannan R, Mariyappan V, Chitra S, Ponmurugaraj N, Boominathan M. Recent development and challenges in fuel cells and water electrolyzer reactions: an overview. RSC Adv 2022; 12:28227-28244. [PMID: 36320254 PMCID: PMC9531000 DOI: 10.1039/d2ra04853a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2022] [Accepted: 09/01/2022] [Indexed: 11/07/2022] Open
Abstract
Water electrolysis is the most promising method for the production of large scalable hydrogen (H2), which can fulfill the global energy demand of modern society. H2-based fuel cell transportation has been operating with zero greenhouse emission to improve both indoor and outdoor air quality, in addition to the development of economically viable sustainable green energy for widespread electrochemical applications. Many countries have been eagerly focusing on the development of renewable as well as H2-based energy storage infrastructure to fulfill their growing energy demands and sustainable goals. This review article mainly discusses the development of different kinds of fuel cell electrocatalysts, and their application in H2 production through various processes (chemical, refining, and electrochemical). The fuel cell parameters such as redox properties, cost-effectiveness, ecofriendlyness, conductivity, and better electrode stability have also been highlighted. In particular, a detailed discussion has been carried out with sufficient insights into the sustainable development of future green energy economy.
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Affiliation(s)
- Rasu Ramachandran
- Department of Chemistry, The Madura College (Madurai Kamaraj University) Vidhya Nagar, T.P.K. Road Madurai 625011 India
| | - Tse-Wei Chen
- Department of Materials, Imperial College London London SW7 2AZ UK
| | | | - Ganesan Anushya
- Department of Physics, St. Joseph College of Engineering Sriperumbudur Chennai 602117 India
| | - Shen-Ming Chen
- Electroanalysis and Bio-electrochemistry Laboratory, Department of Chemical Engineering and Biotechnology, National Taipei University of Technology Taipei 106 Taiwan
| | - Ramanjam Kannan
- Department of Chemistry, Sri KumaraguruparaSwamigal Arts College Srivaikuntam Thoothukudi-628619 India
| | - Vinitha Mariyappan
- Electroanalysis and Bio-electrochemistry Laboratory, Department of Chemical Engineering and Biotechnology, National Taipei University of Technology Taipei 106 Taiwan
| | - Selvam Chitra
- Department of Chemistry, Alagappa Government Arts College Karaikudi 630003 India
| | | | - Muthusamy Boominathan
- Department of Chemistry, The Madura College (Madurai Kamaraj University) Vidhya Nagar, T.P.K. Road Madurai 625011 India
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Zhao X, Tang H, Jiang X. Deploying Gold Nanomaterials in Combating Multi-Drug-Resistant Bacteria. ACS NANO 2022; 16:10066-10087. [PMID: 35776694 DOI: 10.1021/acsnano.2c02269] [Citation(s) in RCA: 42] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Antibiotic resistance has become a serious threat to human health due to the overuse of antibiotics. Different antibiotics are being developed to treat resistant bacteria, but the development cycle of antibiotics is hard to keep up with the high incidence of antibiotic resistance. Recent advances in antimicrobial nanomaterials have made nanotechnology a powerful solution to this dilemma. Among these nanomaterials, gold nanomaterials have excellent antibacterial efficacy and biosafety, making them alternatives to antibiotics. This review presents strategies that use gold nanomaterials to combat drug-resistant bacteria. We focus on the influence of physicochemical factors such as surface chemistry, size, and shape of gold nanomaterials on their antimicrobial properties and describe the antimicrobial applications of gold nanomaterials in medical devices. Finally, the existing challenges and future directions are discussed.
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Affiliation(s)
- Xiaohui Zhao
- Guangdong Provincial Key Laboratory of Advanced Biomaterials, Shenzhen Key Laboratory of Smart Healthcare Engineering, Department of Biomedical Engineering, Southern University of Science and Technology, Guangdong 518055, P.R. China
| | - Hao Tang
- Guangdong Provincial Key Laboratory of Advanced Biomaterials, Shenzhen Key Laboratory of Smart Healthcare Engineering, Department of Biomedical Engineering, Southern University of Science and Technology, Guangdong 518055, P.R. China
| | - Xingyu Jiang
- Guangdong Provincial Key Laboratory of Advanced Biomaterials, Shenzhen Key Laboratory of Smart Healthcare Engineering, Department of Biomedical Engineering, Southern University of Science and Technology, Guangdong 518055, P.R. China
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Aziz SB, Nofal MM, Brza MA, Sadiq NM, Dannoun EMA, Ahmed KK, Al-Saeedi SI, Hussen SA, Hussein AM. Innovative Green Chemistry Approach to Synthesis of Sn2+-Metal Complex and Design of Polymer Composites with Small Optical Band Gaps. Molecules 2022; 27:molecules27061965. [PMID: 35335328 PMCID: PMC8949699 DOI: 10.3390/molecules27061965] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2022] [Revised: 03/06/2022] [Accepted: 03/08/2022] [Indexed: 02/01/2023] Open
Abstract
In this work, the green method was used to synthesize Sn2+-metal complex by polyphenols (PPHs) of black tea (BT). The formation of Sn2+-PPHs metal complex was confirmed through UV-Vis and FTIR methods. The FTIR method shows that BT contains NH and OH functional groups, conjugated double bonds, and PPHs which are important to create the Sn2+-metal complexes. The synthesized Sn2+-PPHs metal complex was used successfully to decrease the optical energy band gap of PVA polymer. XRD method showed that the amorphous phase increased with increasing the metal complexes. The FTIR and XRD analysis show the complex formation between Sn2+-PPHs metal complex and PVA polymer. The enhancement in the optical properties of PVA was evidenced via UV-visible spectroscopy method. When Sn2+-PPHs metal complex was loaded to PVA, the refractive index and dielectric constant were improved. In addition, the absorption edge was also decreased to lower photon. The optical energy band gap decreases from 6.4 to 1.8 eV for PVAloaded with 30% (v/v) Sn2+-PPHs metal complex. The variations of dielectric constant versus wavelength of photon are examined to measure localized charge density (N/m*) and high frequency dielectric constant. By increasing Sn2+-PPHs metal complex, the N/m* are improved from 3.65 × 1055 to 13.38 × 1055 m−3 Kg−1. The oscillator dispersion energy (Ed) and average oscillator energy (Eo) are measured. The electronic transition natures in composite films are determined based on the Tauc’s method, whereas close examinations of the dielectric loss parameter are also held to measure the energy band gap.
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Affiliation(s)
- Shujahadeen B. Aziz
- Hameed Majid Advanced Polymeric Materials Research Lab., Physics Department, College of Science, University of Sulaimani, Qlyasan Street, Sulaimani 46001, Kurdistan Regional Government, Iraq; (N.M.S.); (K.K.A.); (S.A.H.); (A.M.H.)
- Department of Civil Engineering, College of Engineering, Komar University of Science and Technology, Sulaimani 46001, Kurdistan Regional Government, Iraq
- Correspondence:
| | - Muaffaq M. Nofal
- Department of Mathematics and Science, Prince Sultan University, P.O. Box 66833, Riyadh 11586, Saudi Arabia;
| | - Mohamad A. Brza
- Medical Physics Department, College of Medicals & Applied Science, Charmo University, Chamchamal, Sulaimania 46023, Iraq;
| | - Niyaz M. Sadiq
- Hameed Majid Advanced Polymeric Materials Research Lab., Physics Department, College of Science, University of Sulaimani, Qlyasan Street, Sulaimani 46001, Kurdistan Regional Government, Iraq; (N.M.S.); (K.K.A.); (S.A.H.); (A.M.H.)
| | - Elham M. A. Dannoun
- Department of Mathematics and Science, Woman Campus, Prince Sultan University, P.O. Box 66833, Riyadh 11586, Saudi Arabia;
| | - Khayal K. Ahmed
- Hameed Majid Advanced Polymeric Materials Research Lab., Physics Department, College of Science, University of Sulaimani, Qlyasan Street, Sulaimani 46001, Kurdistan Regional Government, Iraq; (N.M.S.); (K.K.A.); (S.A.H.); (A.M.H.)
| | - Sameerah I. Al-Saeedi
- Department of Chemistry, College of Science, Princess Nourah bint Abdulrahman University, P.O. Box 84428, Riyadh 11671, Saudi Arabia;
| | - Sarkawt A. Hussen
- Hameed Majid Advanced Polymeric Materials Research Lab., Physics Department, College of Science, University of Sulaimani, Qlyasan Street, Sulaimani 46001, Kurdistan Regional Government, Iraq; (N.M.S.); (K.K.A.); (S.A.H.); (A.M.H.)
| | - Ahang M. Hussein
- Hameed Majid Advanced Polymeric Materials Research Lab., Physics Department, College of Science, University of Sulaimani, Qlyasan Street, Sulaimani 46001, Kurdistan Regional Government, Iraq; (N.M.S.); (K.K.A.); (S.A.H.); (A.M.H.)
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Bharatiya D, Patra S, Parhi B, Swain SK. A materials science approach towards bioinspired polymeric nanocomposites: a comprehensive review. INT J POLYM MATER PO 2021. [DOI: 10.1080/00914037.2021.1990057] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Debasrita Bharatiya
- Department of Chemistry, Veer Surendra Sai University of Technology, Sambalpur, India
| | - Swapnita Patra
- Department of Chemistry, Veer Surendra Sai University of Technology, Sambalpur, India
| | - Biswajit Parhi
- Department of Chemistry, Veer Surendra Sai University of Technology, Sambalpur, India
| | - Sarat K. Swain
- Department of Chemistry, Veer Surendra Sai University of Technology, Sambalpur, India
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Nofal MM, Aziz SB, Hadi JM, Karim WO, Dannoun EMA, Hussein AM, Hussen SA. Polymer Composites with 0.98 Transparencies and Small Optical Energy Band Gap Using a Promising Green Methodology: Structural and Optical Properties. Polymers (Basel) 2021; 13:1648. [PMID: 34069445 PMCID: PMC8159149 DOI: 10.3390/polym13101648] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2021] [Revised: 05/12/2021] [Accepted: 05/14/2021] [Indexed: 12/23/2022] Open
Abstract
In this work, a green approach was implemented to prepare polymer composites using polyvinyl alcohol polymer and the extract of black tea leaves (polyphenols) in a complex form with Co2+ ions. A range of techniques was used to characterize the Co2+ complex and polymer composite, such as Ultraviolet-visible (UV-Visible) spectroscopy, Fourier transform infrared spectroscopy (FTIR), and X-ray diffraction (XRD). The optical parameters of absorption edge, refractive index (n), dielectric properties including real and imaginary parts (εr, and εi) were also investigated. The FRIR and XRD spectra were used to examine the compatibility between the PVA polymer and Co2+-polyphenol complex. The extent of interaction was evidenced from the shifts and change in the intensity of the peaks. The relatively wide amorphous phase in PVA polymer increased upon insertion of the Co2+-polyphenol complex. The amorphous character of the Co2+ complex was emphasized with the appearance of a hump in the XRD pattern. From UV-Visible spectroscopy, the optical properties, such as absorption edge, refractive index (n), (εr), (εi), and bandgap energy (Eg) of parent PVA and composite films were specified. The Eg of PVA was lowered from 5.8 to 1.82 eV upon addition of 45 mL of Co2+-polyphenol complex. The N/m* was calculated from the optical dielectric function. Ultimately, various types of electronic transitions within the polymer composites were specified using Tauc's method. The direct bandgap (DBG) treatment of polymer composites with a developed amorphous phase is fundamental for commercialization in optoelectronic devices.
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Affiliation(s)
- Muaffaq M. Nofal
- Department of Mathematics and General Sciences, Prince Sultan University, P.O. Box 66833, Riyadh 11586, Saudi Arabia;
| | - Shujahadeen B. Aziz
- Hameed Majid Advanced Polymeric Materials Research Laboratory, Physics Department, College of Science, University of Sulaimani, Qlyasan Street, Sulaimani 46001, Kurdistan Regional Government, Iraq; (A.M.H.); (S.A.H.)
- Department of Civil Engineering, College of Engineering, Komar University of Science and Technology, Sulaimani 46001, Kurdistan Regional Government, Iraq
| | - Jihad M. Hadi
- Department of Medical Laboratory of Science, College of Health Sciences, University of Human Development, Sulaimani 46001, Kurdistan Regional Government, Iraq;
| | - Wrya O. Karim
- Chemistry Department, College of Science, University of Sulaimani, Qlyasan Street, Sulaimani 46001, Kurdistan Regional Government, Iraq;
| | - Elham M. A. Dannoun
- Associate Director of General Science Department, Woman Campus, Prince Sultan University, P.O. Box 66833, Riyadh 11586, Saudi Arabia;
| | - Ahang M. Hussein
- Hameed Majid Advanced Polymeric Materials Research Laboratory, Physics Department, College of Science, University of Sulaimani, Qlyasan Street, Sulaimani 46001, Kurdistan Regional Government, Iraq; (A.M.H.); (S.A.H.)
| | - Sarkawt A. Hussen
- Hameed Majid Advanced Polymeric Materials Research Laboratory, Physics Department, College of Science, University of Sulaimani, Qlyasan Street, Sulaimani 46001, Kurdistan Regional Government, Iraq; (A.M.H.); (S.A.H.)
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Qiu L, Wang C, Lan M, Guo Q, Du X, Zhou S, Cui P, Hong T, Jiang P, Wang J, Xia J. Antibacterial Photodynamic Gold Nanoparticles for Skin Infection. ACS APPLIED BIO MATERIALS 2021; 4:3124-3132. [PMID: 35014400 DOI: 10.1021/acsabm.0c01505] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Damage or injury to the skin creates wounds that are vulnerable to bacterial infection, which in turn retards the process of skin regeneration and wound healing. In patients with severe burns and those with chronic diseases, such as diabetes, skin infection by multidrug-resistant bacteria can be lethal. Therefore, a broad-spectrum therapy to effectively eradicate bacterial infection through a mechanism different from that of antibiotics is much sought after. We successfully synthesized antibacterial photodynamic gold nanoparticles (AP-AuNPs), which are self-assembled nanocomposites of an antibacterial photodynamic peptide and poly(ethylene glycol) (PEG)-stabilized AuNPs. The AP-AuNPs exhibited aqueous and light stability, a satisfactory generation of reactive oxygen species (ROS), and a remarkable antibacterial effect toward both Gram-positive Staphylococcus aureus and Gram-negative Escherichia coli upon light irradiation. Moreover, the synthesized nanocomposites significantly inhibited bacterial growth and biofilm formation in vitro. Photodynamic antibacterial treatment accelerated the wound-healing rate in S. aureus infections, mimicking staphylococcal skin infections. Using a combination of the bactericidal effect of a peptide, the photodynamic effect of a photosensitizer, and the multivalency clustering on AuNPs for maximal antibacterial effect under light irradiation, we synthesized AP-AuNPs as a wound-dressing nanomaterial in skin infections to promote wound healing. Our findings indicate a promising strategy in the management of bacterial infections resulting from damaged skin tissue, an aspect that has not been fully explored by our peers.
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Affiliation(s)
- Lin Qiu
- School of Pharmacy, Changzhou University, Changzhou, Jiangsu 213164, China
| | - Cheng Wang
- School of Pharmacy, Changzhou University, Changzhou, Jiangsu 213164, China
| | - Min Lan
- School of Pharmacy, Changzhou University, Changzhou, Jiangsu 213164, China
| | - Qianqian Guo
- School of Pharmacy, Changzhou University, Changzhou, Jiangsu 213164, China
| | - Xuancheng Du
- Institute of Advanced Interdisciplinary Science, School of Physics, Shandong University, Jinan 250100, China
| | - Shuwen Zhou
- School of Pharmacy, Changzhou University, Changzhou, Jiangsu 213164, China
| | - Pengfei Cui
- School of Pharmacy, Changzhou University, Changzhou, Jiangsu 213164, China
| | - Tingting Hong
- School of Pharmacy, Changzhou University, Changzhou, Jiangsu 213164, China
| | - Pengju Jiang
- School of Pharmacy, Changzhou University, Changzhou, Jiangsu 213164, China
| | - Jianhao Wang
- School of Pharmacy, Changzhou University, Changzhou, Jiangsu 213164, China
| | - Jiang Xia
- Department of Chemistry, The Chinese University of Hong Kong, Shatin, Hong Kong SAR, China
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Seaberg J, Montazerian H, Hossen MN, Bhattacharya R, Khademhosseini A, Mukherjee P. Hybrid Nanosystems for Biomedical Applications. ACS NANO 2021; 15:2099-2142. [PMID: 33497197 PMCID: PMC9521743 DOI: 10.1021/acsnano.0c09382] [Citation(s) in RCA: 68] [Impact Index Per Article: 22.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
Inorganic/organic hybrid nanosystems have been increasingly developed for their versatility and efficacy at overcoming obstacles not readily surmounted by nonhybridized counterparts. Currently, hybrid nanosystems are implemented for gene therapy, drug delivery, and phototherapy in addition to tissue regeneration, vaccines, antibacterials, biomolecule detection, imaging probes, and theranostics. Though diverse, these nanosystems can be classified according to foundational inorganic/organic components, accessory moieties, and architecture of hybridization. Within this Review, we begin by providing a historical context for the development of biomedical hybrid nanosystems before describing the properties, synthesis, and characterization of their component building blocks. Afterward, we introduce the architectures of hybridization and highlight recent biomedical nanosystem developments by area of application, emphasizing hybrids of distinctive utility and innovation. Finally, we draw attention to ongoing clinical trials before recapping our discussion of hybrid nanosystems and providing a perspective on the future of the field.
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Affiliation(s)
- Joshua Seaberg
- Department of Pathology, University of Oklahoma Health Science Center, Oklahoma City, Oklahoma 73104, USA
| | - Hossein Montazerian
- Department of Bioengineering, University of California-Los Angeles, Los Angeles, CA 90095, USA
- Center for Minimally Invasive Therapeutics (C-MIT), University of California-Los Angeles, Los Angeles, CA 90095, USA
- Terasaki Institute for Biomedical Innovation (TIBI), Los Angeles, CA 90024, USA
| | - Md Nazir Hossen
- Department of Pathology, University of Oklahoma Health Science Center, Oklahoma City, Oklahoma 73104, USA
- Peggy and Charles Stephenson Cancer Center, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma 73104, USA
| | - Resham Bhattacharya
- Department of Obstetrics and Gynecology, University of Oklahoma Health Science Center, Oklahoma City, OK 73104, USA
| | - Ali Khademhosseini
- Terasaki Institute for Biomedical Innovation (TIBI), Los Angeles, CA 90024, USA
| | - Priyabrata Mukherjee
- Department of Pathology, University of Oklahoma Health Science Center, Oklahoma City, Oklahoma 73104, USA
- Peggy and Charles Stephenson Cancer Center, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma 73104, USA
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Morales-de-Echegaray AV, Lin L, Sivasubramaniam B, Yermembetova A, Wang Q, Abutaleb NS, Seleem MN, Wei A. Antimicrobial photodynamic activity of gallium-substituted haemoglobin on silver nanoparticles. NANOSCALE 2020; 12:21734-21742. [PMID: 33094755 PMCID: PMC7663423 DOI: 10.1039/c9nr09064a] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
Methicillin-resistant Staphylococcus aureus (MRSA), a major scourge in skin and soft-tissue infections, expresses surface-bound haemoprotein receptors that can be exploited for the targeted delivery of photosensitizers. We have developed a nanosized agent for targeted antimicrobial photodynamic therapy (aPDT), comprised of GaPpIX (a hemin analog with potent photosensitizer activity) encapsulated in haemoglobin (GaHb), mounted on 10 nm Ag nanoparticles (AgNPs). The average GaHb-AgNP contains 28 GaPpIX units stabilized by Hb αβ-dimer units. Eradication (>6-log reduction) of S. aureus and MRSA can be achieved by a 10-second exposure to 405 nm irradiation from a light-emitting diode (LED) array (140 mW cm-2), with GaHb-AgNP loadings as low as 5.6 μg mL-1 for S. aureus and 16.6 μg mL-1 for MRSA, corresponding to nanomolar levels of GaPpIX. This reduction in bacterial count is several orders of magnitude greater than that of GaHb or free GaPpIX on a per mole basis. The GaHb-AgNP platform is also effective against persister MRSA and intracellular MRSA, and can provide comparable levels of aPDT with a 15-minute irradiation by an inexpensive compact fluorescent lightbulb. Collateral phototoxicity to keratinocytes (HaCaT cells) is low at the GaHb-AgNP concentrations and fluences used for aPDT. GaHb adsorbed on 10 nm AgNPs is much more potent than that on 40 nm AgNPs or 10 nm AuNPs, indicating that both size and plasmon-resonant coupling are important factors for enhanced aPDT. Electron microscopy analysis reveals that GaHb-AgNPs are not readily internalized by S. aureus but remain attached to the bacterial cell wall, the likely target of photo-oxidative damage.
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Aziz SB, Brza MA, Nofal MM, Abdulwahid RT, Hussen SA, Hussein AM, Karim WO. A Comprehensive Review on Optical Properties of Polymer Electrolytes and Composites. MATERIALS (BASEL, SWITZERLAND) 2020; 13:E3675. [PMID: 32825367 PMCID: PMC7503865 DOI: 10.3390/ma13173675] [Citation(s) in RCA: 50] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/28/2020] [Revised: 08/09/2020] [Accepted: 08/17/2020] [Indexed: 12/20/2022]
Abstract
Polymer electrolytes and composites have prevailed in the high performance and mobile marketplace during recent years. Polymer-based solid electrolytes possess the benefits of low flammability, excellent flexibility, good thermal stability, as well as higher safety. Several researchers have paid attention to the optical properties of polymer electrolytes and their composites. In the present review paper, first, the characteristics, fundamentals, advantages and principles of various types of polymer electrolytes were discussed. Afterward, the characteristics and performance of various polymer hosts on the basis of specific essential and newly published works were described. New developments in various approaches to investigate the optical properties of polymer electrolytes were emphasized. The last part of the review devoted to the optical band gap study using two methods: Tauc's model and optical dielectric loss parameter. Based on recently published literature sufficient quantum mechanical backgrounds were provided to support the applicability of the optical dielectric loss parameter for the band gap study. In this review paper, it was demonstrated that both Tauc's model and optical dielectric loss should be studied to specify the type of electron transition and estimate the optical band gap accurately. Other parameters such as absorption coefficient, refractive index and optical dielectric constant were also explored.
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Affiliation(s)
- Shujahadeen B. Aziz
- Advanced Polymeric Materials Research Lab., Department of Physics, College of Science, University of Sulaimani, Qlyasan Street, Sulaimani 46001, Kurdistan Regional Government, Iraq; (R.T.A.); (S.A.H.); (A.M.H.)
- Department of Civil Engineering, College of Engineering, Komar University of Science and Technology, Sulaimani 46001, Kurdistan Regional Government, Iraq
| | - M. A. Brza
- Manufacturing and Material Engineering, Faculty of Engineering, International Islamic University of Malaysia, Kuala Lumpur, Gombak 53100, Malaysia;
| | - Muaffaq M. Nofal
- Department of Mathematics and General Sciences, Prince Sultan University, P.O. Box 66833, Riyadh 11586, Saudi Arabia;
| | - Rebar T. Abdulwahid
- Advanced Polymeric Materials Research Lab., Department of Physics, College of Science, University of Sulaimani, Qlyasan Street, Sulaimani 46001, Kurdistan Regional Government, Iraq; (R.T.A.); (S.A.H.); (A.M.H.)
- Department of Physics, College of Education, University of Sulaimani, Kurdistan Regional Government, Old Campus, Sulaimani 46001, Iraq
| | - Sarkawt A. Hussen
- Advanced Polymeric Materials Research Lab., Department of Physics, College of Science, University of Sulaimani, Qlyasan Street, Sulaimani 46001, Kurdistan Regional Government, Iraq; (R.T.A.); (S.A.H.); (A.M.H.)
| | - Ahang M. Hussein
- Advanced Polymeric Materials Research Lab., Department of Physics, College of Science, University of Sulaimani, Qlyasan Street, Sulaimani 46001, Kurdistan Regional Government, Iraq; (R.T.A.); (S.A.H.); (A.M.H.)
| | - Wrya O. Karim
- Department of Chemistry, College of Science, University of Sulaimani, Qlyasan Street, Sulaimani 46001, Kurdistan Regional Government, Iraq;
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Yu Z, Li Q, Wang J, Yu Y, Wang Y, Zhou Q, Li P. Reactive Oxygen Species-Related Nanoparticle Toxicity in the Biomedical Field. NANOSCALE RESEARCH LETTERS 2020; 15:115. [PMID: 32436107 PMCID: PMC7239959 DOI: 10.1186/s11671-020-03344-7] [Citation(s) in RCA: 234] [Impact Index Per Article: 58.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/18/2020] [Accepted: 05/10/2020] [Indexed: 05/19/2023]
Abstract
The unique physicochemical characteristics of nanoparticles have recently gained increasing attention in a diverse set of applications, particularly in the biomedical field. However, concerns about the potential toxicological effects of nanoparticles remain, as they have a higher tendency to generate excessive amounts of reactive oxygen species (ROS). Due to the strong oxidation potential, the excess ROS induced by nanoparticles can result in the damage of biomolecules and organelle structures and lead to protein oxidative carbonylation, lipid peroxidation, DNA/RNA breakage, and membrane structure destruction, which further cause necrosis, apoptosis, or even mutagenesis. This review aims to give a summary of the mechanisms and responsible for ROS generation by nanoparticles at the cellular level and provide insights into the mechanics of ROS-mediated biotoxicity. We summarize the literature on nanoparticle toxicity and suggest strategies to optimize nanoparticles for biomedical applications.
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Affiliation(s)
- Zhongjie Yu
- Institute for Translational Medicine, The Affiliated Hospital of Qingdao University, Qingdao University, Qingdao, 266021, China
- School of Basic Medicine, Qingdao University, Qingdao, 266071, China
| | - Qi Li
- Department of Emergency Medicine, The Affiliated Hospital of Qingdao University, Qingdao University, Qingdao, 266003, China
| | - Jing Wang
- Oral Research Center, Qingdao Municipal Hospital, Qingdao, 266011, China
| | - Yali Yu
- Institute for Translational Medicine, The Affiliated Hospital of Qingdao University, Qingdao University, Qingdao, 266021, China
| | - Yin Wang
- Institute for Translational Medicine, The Affiliated Hospital of Qingdao University, Qingdao University, Qingdao, 266021, China
| | - Qihui Zhou
- Institute for Translational Medicine, The Affiliated Hospital of Qingdao University, Qingdao University, Qingdao, 266021, China.
- Center for Stomatology, The Affiliated Hospital of Qingdao University, Qingdao, 266003, China.
| | - Peifeng Li
- Institute for Translational Medicine, The Affiliated Hospital of Qingdao University, Qingdao University, Qingdao, 266021, China.
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14
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Man E, Hoskins C. Towards advanced wound regeneration. Eur J Pharm Sci 2020; 149:105360. [PMID: 32361177 DOI: 10.1016/j.ejps.2020.105360] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2020] [Revised: 04/22/2020] [Accepted: 04/22/2020] [Indexed: 12/12/2022]
Abstract
Wound management is a major contributor towards the economic burden placed upon the national health service (NHS), serving as an important target for the development of advanced therapeutic interventions. The economic expenditure of wound care for the NHS exceeds £5 billion per annum, thus presenting a significant opportunity for the introduction of alternative treatments in regards to their approach in tackling the ever increasing prevalence of wound management associated problems. As most wounds typically fall under the acute or chronic category, it is therefore necessary to design a therapeutic intervention capable of effectively resolving the pathologies associated with each problem. Such an intervention should be of increased economic viability and therapeutic effectiveness when compared to standardized treatments, thus helping to alleviate the financial burden imposed upon the NHS. The purpose of this review is to critically analyse the various aspects associated with wound management, detailing the fundamental concepts of dermal regeneration, whilst also providing an evaluation of the different materials and methods that can be utilised to achieve maximal wound regeneration. The primary aspects of this review revolve around the three concepts of antibacterial methodology, enhancement of dermal regeneration and the utilisation of a carrier medium to facilitate the regenerative process. Each aspect is explored, conveying its justifications as a target for dermal regeneration, whilst offering various solutions towards the fulfilment of a therapeutic design that is both effective and financially feasible.
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Affiliation(s)
- Ernest Man
- Department of Pure and Applied Chemistry, Faculty of Science, University of Strathclyde, Glasgow, Scotland, G1 1RD, United Kingdom
| | - Clare Hoskins
- Department of Pure and Applied Chemistry, Faculty of Science, University of Strathclyde, Glasgow, Scotland, G1 1RD, United Kingdom.
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15
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Preparation, characterization and stability assessment of keratin and albumin functionalized gold nanoparticles for biomedical applications. APPLIED NANOSCIENCE 2020. [DOI: 10.1007/s13204-020-01250-z] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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16
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Peng R, Luo Y, Cui Q, Wang J, Li L. Near-Infrared Conjugated Oligomer for Effective Killing of Bacterial through Combination of Photodynamic and Photothermal Treatment. ACS APPLIED BIO MATERIALS 2020; 3:1305-1311. [DOI: 10.1021/acsabm.9b01242] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Rui Peng
- School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
| | - Yufeng Luo
- School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
| | - Qianling Cui
- School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
| | - Jun Wang
- School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
| | - Lidong Li
- School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
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17
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Nanoengineering of Gold Nanoparticles: Green Synthesis, Characterization, and Applications. CRYSTALS 2019. [DOI: 10.3390/cryst9120612] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
The fundamental aspects of the manufacturing of gold nanoparticles (AuNPs) are discussed in this review. In particular, attention is devoted to the development of a simple and versatile method for the preparation of these nanoparticles. Eco-friendly synthetic routes, such as wet chemistry and biosynthesis with the aid of polymers, are of particular interest. Polymers can act as reducing and/or capping agents, or as soft templates leading to hybrid nanomaterials. This methodology allows control of the synthesis and stability of nanomaterials with novel properties. Thus, this review focus on a fundamental study of AuNPs properties and different techniques to characterize them, e.g., Transmission Electron Microscopy (TEM), Atomic Force Microscopy (AFM), UV-Visible spectroscopy, Dynamic Light Scattering (DLS), X-Ray Diffraction (XRD), X-Ray Photoelectron Spectroscopy, Small-angle X-Ray Scattering (SAXS), and rheology. Recently, AuNPs obtained by “green” synthesis have been applied in catalysis, in medicine, and as antibacterials, sensors, among others.
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18
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Jia Q, Song Q, Li P, Huang W. Rejuvenated Photodynamic Therapy for Bacterial Infections. Adv Healthc Mater 2019; 8:e1900608. [PMID: 31240867 DOI: 10.1002/adhm.201900608] [Citation(s) in RCA: 174] [Impact Index Per Article: 34.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2019] [Revised: 06/13/2019] [Indexed: 12/31/2022]
Abstract
The emergence of multidrug resistant bacterial strains has hastened the exploration of advanced microbicides and antibacterial techniques. Photodynamic antibacterial therapy (PDAT), an old-fashioned technique, has been rejuvenated to combat "superbugs" and biofilm-associated infections owing to its excellent characteristics of noninvasiveness and broad antibacterial spectrum. More importantly, bacteria are less likely to produce drug resistance to PDAT because it does not require specific targeting interaction between photosensitizers (PSs) and bacteria. This review mainly focuses on recent developments and future prospects of PDAT. The mechanisms of PDAT against bacteria and biofilms are briefly introduced. In addition to classical macrocyclic PSs, several innovative PSs, including non-self-quenching PSs, conjugated polymer-based PSs, and nano-PSs, are summarized in detail. Numerous multifunctional PDAT systems such as in situ light-activated PDAT, stimuli-responsive PDAT, oxygen self-enriching enhanced PDAT, and PDAT-based multimodal therapy are highlighted to overcome the inherent defects of PDAT in vivo (e.g., limited penetration depth of light and hypoxic environment of infectious sites).
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Affiliation(s)
- Qingyan Jia
- Xi'an Institute of Flexible Electronics (IFE)Xi'an Institute of Biomedical Materials and Engineering (IBME)Northwestern Polytechnical University (NPU) 127 West Youyi Road Xi'an 710072 China
| | - Qing Song
- Xi'an Institute of Flexible Electronics (IFE)Xi'an Institute of Biomedical Materials and Engineering (IBME)Northwestern Polytechnical University (NPU) 127 West Youyi Road Xi'an 710072 China
| | - Peng Li
- Xi'an Institute of Flexible Electronics (IFE)Xi'an Institute of Biomedical Materials and Engineering (IBME)Northwestern Polytechnical University (NPU) 127 West Youyi Road Xi'an 710072 China
| | - Wei Huang
- Xi'an Institute of Flexible Electronics (IFE)Xi'an Institute of Biomedical Materials and Engineering (IBME)Northwestern Polytechnical University (NPU) 127 West Youyi Road Xi'an 710072 China
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19
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Wang L, Yuan Z, Karahan HE, Wang Y, Sui X, Liu F, Chen Y. Nanocarbon materials in water disinfection: state-of-the-art and future directions. NANOSCALE 2019; 11:9819-9839. [PMID: 31080989 DOI: 10.1039/c9nr02007a] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
Water disinfection practices are critical for supplying safe drinking water. Existing water disinfection methods come with various drawbacks, calling for alternative or complementary solutions. Nanocarbon materials (NCMs) offer unique advantages for water disinfection owing to their high antimicrobial activity, often low environmental/human toxicity, and tunable physicochemical properties. Nevertheless, it is a challenge to assess the research progress made so far due to the structure and property diversity in NCMs as well as their different targeted applications. Because of these, here we provide a broad outline of this emerging field in three parts. First, we introduce the antimicrobial activities of the different types of NCMs, including fullerenes, nanodiamonds, carbon (nano)dots, carbon nanotubes, and graphene-family materials. Next, we discuss the current status in applying these NCMs for different water disinfection problems, especially as hydrogel filters, filtration membranes, recyclable aggregates, and electrochemical devices. We also introduce the use of NCMs in photocatalysts for photocatalytic water disinfection. Lastly, we put forward the key hurdles of the field that hamper the realization of the practical applications and propose possible directions for future investigations to address those. We hope that this minireview will encourage researchers to tackle these challenges and innovate NCM-based water disinfection platforms in the near future.
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Affiliation(s)
- Liang Wang
- Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion, School of Chemistry and Chemical Engineering, Tianjin University of Technology, Tianjin 300384, China.
| | - Ziwen Yuan
- The University of Sydney, School of Chemical and Biomolecular Engineering, NSW, 2006, Australia.
| | - H Enis Karahan
- Nanyang Technological University, School of Chemical and Biomedical Engineering, 62 Nanyang Drive, 637459, Singapore
| | - Yilei Wang
- Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion, School of Chemistry and Chemical Engineering, Tianjin University of Technology, Tianjin 300384, China.
| | - Xiao Sui
- The University of Sydney, School of Chemical and Biomolecular Engineering, NSW, 2006, Australia.
| | - Fei Liu
- The University of Sydney, School of Chemical and Biomolecular Engineering, NSW, 2006, Australia. and State Key Laboratory of Applied Microbiology Southern China, Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Guangdong Institute of Microbiology, 100 Central Xianlie Road, Guangzhou 510070, China
| | - Yuan Chen
- The University of Sydney, School of Chemical and Biomolecular Engineering, NSW, 2006, Australia.
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20
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Takafuji M, Kajiwara M, Hano N, Kuwahara Y, Ihara H. Preparation of High Refractive Index Composite Films Based on Titanium Oxide Nanoparticles Hybridized Hydrophilic Polymers. NANOMATERIALS (BASEL, SWITZERLAND) 2019; 9:E514. [PMID: 30986965 PMCID: PMC6523180 DOI: 10.3390/nano9040514] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/21/2019] [Revised: 03/22/2019] [Accepted: 03/22/2019] [Indexed: 11/30/2022]
Abstract
Optical materials with high refractive index (n) have been rapidly improved because of urgent demands imposed by the development of advanced photonic and electronic devices such as solar cells, light emitting diodes (LED and Organic LED), optical lenses and filters, anti-reflection films, and optical adhesives. One successful method to obtain high refractive index materials is the blending of metal oxide nanoparticles such as TiO₂ and ZrO₂ with high n values of 2.1-2.7 into conventional polymers. However, these nanoparticles have a tendency to agglomerate by themselves in a conventional polymer matrix, due to the strong attractive forces between them. Therefore, there is a limitation in the blending amount of inorganic nanoparticles. In this paper, various hydrophilic polymers such as poly(N-hydroxyl acrylamide) (pHEAAm), poly(vinyl alcohol), poly(ethylene glycol), and poly(acrylic acid) were examined for preparation of high refractive index film based on titanium oxide nanoparticle (TiNP) dispersed polymer composite. The hydrogen bonding sites in these hydrophilic polymers would improve the dispersibility of inorganic nanoparticles in the polymer matrix. As a result, pHEAAm exhibited higher compatibility with titanium oxide nanoparticles (TiNPs) than other water-soluble polymers. Transparent hybrid films were prepared by mixing pHEAAm with TiNPs and drop casting the mixture onto a glass plate. The refractive indices of the films were in good agreement with calculated values. The compatibility of TiNPs with pHEAAm was dependent on the surface characteristics of TiNPs. TiNPs with the highest observed compatibility could be hybridized with pHEAAm at concentrations of up to 90 wt%, and the refractive index of the corresponding film reached 1.90. The high compatibility of TiNPs with pHEAAm may be related to the hydrophilicity and amide and hydroxyl moieties of pHEAAm, which cause hydrogen bond formation on the TiO₂ surface. The obtained thin film was slightly yellow due to the color of the original TiNP dispersion; however, the transmittance of the film was higher than 80% in the wavelength range from 480 to 900 nm.
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Affiliation(s)
- Makoto Takafuji
- Department of Applied Chemistry and Biochemistry, Kumamoto University, 2-39-1 Kurokami, Chuo-ku, Kumamoto 860-8555, Japan.
- Kumamoto Institute for Photo-Electro Organics (PHOENICS), 3-11-38 Higashimachi, Higashi-ku, Kumamoto 862-0901, Japan.
| | - Maino Kajiwara
- Department of Applied Chemistry and Biochemistry, Kumamoto University, 2-39-1 Kurokami, Chuo-ku, Kumamoto 860-8555, Japan.
| | - Nanami Hano
- Department of Applied Chemistry and Biochemistry, Kumamoto University, 2-39-1 Kurokami, Chuo-ku, Kumamoto 860-8555, Japan.
| | - Yutaka Kuwahara
- Department of Applied Chemistry and Biochemistry, Kumamoto University, 2-39-1 Kurokami, Chuo-ku, Kumamoto 860-8555, Japan.
| | - Hirotaka Ihara
- Department of Applied Chemistry and Biochemistry, Kumamoto University, 2-39-1 Kurokami, Chuo-ku, Kumamoto 860-8555, Japan.
- Kumamoto Institute for Photo-Electro Organics (PHOENICS), 3-11-38 Higashimachi, Higashi-ku, Kumamoto 862-0901, Japan.
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21
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Tang L, Zhu L, Tang F, Yao C, Wang J, Li L. Mild Synthesis of Copper Nanoparticles with Enhanced Oxidative Stability and Their Application in Antibacterial Films. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:14570-14576. [PMID: 30423251 DOI: 10.1021/acs.langmuir.8b02470] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Copper nanoparticles possess unique physical and chemical properties; however, their application is often restricted, owing to their tendency to oxidize. In this work, we prepared copper nanoparticles with enhanced oxidative stability via a simple and low-cost method, where a modified starch was used as an environmentally friendly reducing agent and biocompatible polyethylenimine was used as a stabilizer. The prepared copper nanoparticles could be stored in air for at least 6 months without any oxidation in a dried state. Interestingly, our synthesis could even be performed at room temperature with a longer reaction time. We used various characterization methods to study the reaction mechanism. The prepared copper nanoparticles were further uniformly doped into an agar film, and this composite showed excellent bacterial killing efficiency, owing to the antibacterial properties of the copper nanoparticles. Our composite film shows potential for various clinical applications, such as wound dressing materials.
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Affiliation(s)
- Liangzhen Tang
- State Key Laboratory for Advanced Metals and Materials, School of Materials Science and Engineering , University of Science and Technology Beijing , Beijing 100083 , People's Republic of China
| | - Li Zhu
- Department of Otolaryngology , Peking University Third Hospital , Beijing 100191 , People's Republic of China
| | - Fu Tang
- State Key Laboratory for Advanced Metals and Materials, School of Materials Science and Engineering , University of Science and Technology Beijing , Beijing 100083 , People's Republic of China
| | - Chuang Yao
- Key Laboratory of Extraordinary Bond Engineering and Advance Materials Technology (EBEAM) of Chongqing , Yangtze Normal University , Chongqing 408100 , People's Republic of China
| | - Jie Wang
- State Key Laboratory for Advanced Metals and Materials, School of Materials Science and Engineering , University of Science and Technology Beijing , Beijing 100083 , People's Republic of China
| | - Lidong Li
- State Key Laboratory for Advanced Metals and Materials, School of Materials Science and Engineering , University of Science and Technology Beijing , Beijing 100083 , People's Republic of China
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22
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Lu B, Ye H, Shang S, Xiong Q, Yu K, Li Q, Xiao Y, Dai F, Lan G. Novel wound dressing with chitosan gold nanoparticles capped with a small molecule for effective treatment of multiantibiotic-resistant bacterial infections. NANOTECHNOLOGY 2018; 29:425603. [PMID: 30070976 DOI: 10.1088/1361-6528/aad7a7] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Wound infection caused by multiantibiotic-resistant bacteria has become a serious problem, and more effective antibacterial agents are required. Herein, we report the preparation of wound dressings using the biocompatible chitosan (CS) as a reducing and stabilizing agent in the synthesis of 2-mercapto-1-methylimidazole (MMT)-capped gold nanocomposites (CS-Au@MMT), with efficient antibacterial effects. The synergistic effects of AuNPs, MMT, and CS led to the disruption of bacterial membranes. After blending with gelatin, crosslinking with tannin acid, and freeze-drying, CS-gelatin (CS-Au@MMT/gelatin) dressing was prepared. It had good mechanical properties as well as efficient water absorption and retention capacities. It exhibited outstanding biocompatibility both in vitro and in a cell-based wound infection model. Moreover, the in vivo rabbit wound healing model revealed that the CS-Au@MMT/gelatin dressing possesses significant antibacterial potential against methicillin-resistant Staphylococcus aureus-associated wound infection. Therefore, the CS-Au@MMT/gelatin dressing described in this study may have huge potential in biomedical applications.
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Affiliation(s)
- Bitao Lu
- College of Textile and Garments, Southwest University, Chongqing 400715, People's Republic of China
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Guan Q, Li YA, Li WY, Dong YB. Photodynamic Therapy Based on Nanoscale Metal-Organic Frameworks: From Material Design to Cancer Nanotherapeutics. Chem Asian J 2018; 13:3122-3149. [DOI: 10.1002/asia.201801221] [Citation(s) in RCA: 55] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2018] [Indexed: 12/25/2022]
Affiliation(s)
- Qun Guan
- College of Chemistry, Chemical Engineering and Materials Science; Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong; Key Laboratory of Molecular and Nano Probes; Ministry of Education; Shandong Normal University; Jinan 250014 P. R. China
| | - Yan-An Li
- College of Chemistry, Chemical Engineering and Materials Science; Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong; Key Laboratory of Molecular and Nano Probes; Ministry of Education; Shandong Normal University; Jinan 250014 P. R. China
| | - Wen-Yan Li
- College of Chemistry, Chemical Engineering and Materials Science; Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong; Key Laboratory of Molecular and Nano Probes; Ministry of Education; Shandong Normal University; Jinan 250014 P. R. China
| | - Yu-Bin Dong
- College of Chemistry, Chemical Engineering and Materials Science; Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong; Key Laboratory of Molecular and Nano Probes; Ministry of Education; Shandong Normal University; Jinan 250014 P. R. China
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24
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Keyvan Rad J, Mahdavian AR, Khoei S, Shirvalilou S. Enhanced Photogeneration of Reactive Oxygen Species and Targeted Photothermal Therapy of C6 Glioma Brain Cancer Cells by Folate-Conjugated Gold-Photoactive Polymer Nanoparticles. ACS APPLIED MATERIALS & INTERFACES 2018; 10:19483-19493. [PMID: 29787247 DOI: 10.1021/acsami.8b05252] [Citation(s) in RCA: 64] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Tumor-selective photodynamic therapy is a successful method for ablation of malignant and cancerous cells. Herein, we introduce the design and preparation of functionalized acrylic copolymer nanoparticles with spiropyran (SP) and imidazole groups through a facile semicontinuous emulsion polymerization. Then, Au3+ ions were immobilized and reduced on their surface to obtain photoresponsive gold-decorated polymer nanoparticles (PGPNPs). The prepared PGPNPs were surface-modified with folic acid as a site-specific tumor cell targeting agent and improve intracellular uptake via endocytosis. Fourier transform infrared spectroscopy and energy dispersive X-ray spectroscopy analyses, UV-vis spectroscopy, scanning electron microscopy, and high-resolution transmission electron microscopy images were employed to characterize their spectral and morphological properties. Fluorescence microscopy images and inductively coupled plasma analysis demonstrated the cell line labeling capability and improved targeting efficiency of folate-conjugated PGPNPs (FA-PGPNPs) toward rat brain cancer cells (C6 glioma) with 71.8% cell uptake in comparison with 28.8% for the nonconjugated ones. Nonpolar SP groups are converted to zwitterionic merocyanine isomers under UV irradiation at 365 nm and their conjugation with Au nanoparticles exhibited enhanced photogeneration of reactive oxygen species (ROS). These were confirmed by intracellular ROS analysis and cytotoxicity evaluation on malignant C6 glioma cells. Owing to the strong surface plasmon resonance absorption of gold nanoparticles, FA-PGPNPs provided elevated local photothermal efficiency under near-IR irradiation at 808 nm. The prepared multifunctional FA-PGPNPs with a comprehensive integration of prospective materials introduced promising nanoprobes with targeting ability, enhanced tumor photodynamic therapy, cell tracking, and photothermal therapy.
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Affiliation(s)
- Jaber Keyvan Rad
- Polymer Science Department , Iran Polymer & Petrochemical Institute , P.O. Box 14965/115, Tehran 1497713115 , Iran
| | - Ali Reza Mahdavian
- Polymer Science Department , Iran Polymer & Petrochemical Institute , P.O. Box 14965/115, Tehran 1497713115 , Iran
| | - Samideh Khoei
- Medical Physics Department, School of Medicine , Iran University of Medical Sciences , Tehran 1449614525 , Iran
| | - Sakine Shirvalilou
- Medical Physics Department, School of Medicine , Iran University of Medical Sciences , Tehran 1449614525 , Iran
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26
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Tan L, Li J, Liu X, Cui Z, Yang X, Yeung KWK, Pan H, Zheng Y, Wang X, Wu S. In Situ Disinfection through Photoinspired Radical Oxygen Species Storage and Thermal-Triggered Release from Black Phosphorous with Strengthened Chemical Stability. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2018; 14:1703197. [PMID: 29251423 DOI: 10.1002/smll.201703197] [Citation(s) in RCA: 96] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/15/2017] [Revised: 10/21/2017] [Indexed: 05/19/2023]
Abstract
Photodynamic therapy (PDT) utilizing light-induced reactive oxygen species (ROS) is a promising alternative to combat antibiotic-resistant bacteria and biofilm. However, the photosensitizer (PS)-modified surface only exhibits antibacterial properties in the presence of light. It is known that extended photoirradiation may lead to phototoxicity and tissue hypoxia, which greatly limits PDT efficiency, while ambient pathogens also have the opportunity to attach to biorelevant surfaces in medical facilities without light. Here, an antimicrobial film composed of black phosphorus nanosheets (BPSs) and poly (4-pyridonemethylstyrene) endoperoxide (PPMS-EPO) to control the storage and release of ROS reversibly is introduced. BPS, as a biocompatible PS, can produce high singlet oxygen under the irradiation of visible light of 660 nm, which can be stably stored in PPMS-EPO. The ROS can be gradually thermally released in the dark. In vitro antibacterial studies demonstrate that the PPMS-EPO/BPS film exhibits a rapid disinfection ability with antibacterial rate of 99.3% against Escherichia coli and 99.2% against Staphylococcus aureus after 10 min of irradiation. Even without light, the corresponding antibacterial rate reaches 76.5% and 69.7%, respectively. In addition, incorporating PPMS significantly improves the chemical stability of the BPS.
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Affiliation(s)
- Lei Tan
- Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Ministry-of-Education Key Laboratory for the Green Preparation and Application of Functional Materials, Hubei Key Laboratory of Polymer Materials, School of Materials Science & Engineering, Hubei University, Wuhan, 430062, China
| | - Jun Li
- Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Ministry-of-Education Key Laboratory for the Green Preparation and Application of Functional Materials, Hubei Key Laboratory of Polymer Materials, School of Materials Science & Engineering, Hubei University, Wuhan, 430062, China
| | - Xiangmei Liu
- Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Ministry-of-Education Key Laboratory for the Green Preparation and Application of Functional Materials, Hubei Key Laboratory of Polymer Materials, School of Materials Science & Engineering, Hubei University, Wuhan, 430062, China
| | - Zhenduo Cui
- School of Materials Science & Engineering, Tianjin University, Tianjin, 300072, China
| | - Xianjin Yang
- School of Materials Science & Engineering, Tianjin University, Tianjin, 300072, China
| | - Kelvin Wai Kwok Yeung
- Department of Orthopaedics & Traumatology, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Pokfulam, Hong Kong, 999077, China
| | - Haobo Pan
- Center for Human Tissues and Organs Degeneration, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, 518055, China
| | - Yufeng Zheng
- China State Key Laboratory for Turbulence and Complex System and Department of Materials Science and Engineering, College of Engineering, Peking University, Beijing, 100871, China
| | - Xianbao Wang
- Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Ministry-of-Education Key Laboratory for the Green Preparation and Application of Functional Materials, Hubei Key Laboratory of Polymer Materials, School of Materials Science & Engineering, Hubei University, Wuhan, 430062, China
| | - Shuilin Wu
- Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Ministry-of-Education Key Laboratory for the Green Preparation and Application of Functional Materials, Hubei Key Laboratory of Polymer Materials, School of Materials Science & Engineering, Hubei University, Wuhan, 430062, China
- School of Materials Science & Engineering, Tianjin University, Tianjin, 300072, China
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27
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Liu S, Yuan H, Bai H, Zhang P, Lv F, Liu L, Dai Z, Bao J, Wang S. Electrochemiluminescence for Electric-Driven Antibacterial Therapeutics. J Am Chem Soc 2018; 140:2284-2291. [DOI: 10.1021/jacs.7b12140] [Citation(s) in RCA: 124] [Impact Index Per Article: 20.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Shanshan Liu
- Beijing National
Laboratory for Molecular Sciences, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100910, PR China
- School of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210023, PR China
| | - Huanxiang Yuan
- Beijing National
Laboratory for Molecular Sciences, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100910, PR China
| | - Haotian Bai
- Beijing National
Laboratory for Molecular Sciences, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100910, PR China
| | - Pengbo Zhang
- Beijing National
Laboratory for Molecular Sciences, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100910, PR China
| | - Fengting Lv
- Beijing National
Laboratory for Molecular Sciences, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100910, PR China
| | - Libing Liu
- Beijing National
Laboratory for Molecular Sciences, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100910, PR China
| | - Zhihui Dai
- School of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210023, PR China
| | - Jianchun Bao
- School of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210023, PR China
| | - Shu Wang
- Beijing National
Laboratory for Molecular Sciences, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100910, PR China
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28
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Tran CD, Prosenc F, Franko M. Facile synthesis, structure, biocompatibility and antimicrobial property of gold nanoparticle composites from cellulose and keratin. J Colloid Interface Sci 2018; 510:237-245. [DOI: 10.1016/j.jcis.2017.09.006] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2017] [Revised: 08/28/2017] [Accepted: 09/01/2017] [Indexed: 12/26/2022]
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29
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Hatami M, Yazdan Panah M. Ultrasonic assisted synthesis of nanocomposite materials based on resole resin and surface modified nano CeO 2: Chemical and morphological aspects. ULTRASONICS SONOCHEMISTRY 2017; 39:160-173. [PMID: 28732933 DOI: 10.1016/j.ultsonch.2017.04.028] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/25/2017] [Revised: 04/19/2017] [Accepted: 04/20/2017] [Indexed: 06/07/2023]
Abstract
In this study, phenol-formaldehyde (PF)/CeO2 nanocomposites (NC)s were prepared by in-situ polymerization of phenol and formaldehyde in alkali solution in the presence of surface modified CeO2 nanoparticles (NP)s by sonochemical assisted synthesis. The morphology and structure of PF/CeO2 NCs were characterized by using fourier transform infrared spectroscopy (FT-IR), field emission scanning electron microscopy (FE-SEM), atomic force microscopy (AFM), X-ray diffraction (XRD), and thermal analyses methods. It was found that due to the good dispersion of surface modified NPs in polymer matrix and the strong interfacial interaction between the CeO2 NPs and PF matrix, the thermal stability and thermo-mechanical properties of the PF/CeO2 NCs were greatly enhanced. FE-SEM and AFM analyses showed the uniform distribution of CeO2 NPs in PF matrix. The XRD patterns of NCs show the presence of crystalline CeO2 NPs in amorphous matrix. The thermal analysis results reveal that, with increases in the content of CeO2 NPs in PF matrix, the thermally stability factors of samples were drastically enhanced.
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Affiliation(s)
- Mehdi Hatami
- Polymer Research Laboratory, Department of Polymer Science and Engineering, University of Bonab, P.O. Box 5551761167, Bonab, Iran.
| | - Mohammadreza Yazdan Panah
- Polymer Research Laboratory, Department of Polymer Science and Engineering, University of Bonab, P.O. Box 5551761167, Bonab, Iran
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30
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Chen S, Tang F, Tang L, Li L. Synthesis of Cu-Nanoparticle Hydrogel with Self-Healing and Photothermal Properties. ACS APPLIED MATERIALS & INTERFACES 2017; 9:20895-20903. [PMID: 28569057 DOI: 10.1021/acsami.7b04956] [Citation(s) in RCA: 86] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
Abstract
Copper (Cu) nanoparticles possess unusual electrical, thermal, and optical properties. However, applications of these materials are often limited by their tendency to oxidize. We prepared Cu nanoparticles by a simple polyol method, with a good control over the particle size. The reaction required no inert atmosphere or surfactant agents. The as-prepared Cu nanoparticles showed good resistance to oxidation in solution. These Cu nanoparticles were then incorporated into a biocompatible polysaccharide hydrogel, which further stabilized the nanoparticles. The hybrid hydrogel exhibited a rapid self-healing ability. Because of the excellent photothermal conversion properties of the embedded Cu nanoparticles, the hybrid hydrogel showed rapid temperature elevation under laser irradiation. The hybrid hydrogel showed limited cytotoxicity; however, under laser irradiation the hydrogel displayed antibacterial properties owing to the heating effects. This study demonstrates that our hybrid hydrogel may have applications in biomedical fields and photothermal therapy.
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Affiliation(s)
- Shuai Chen
- State Key Laboratory for Advanced Metals and Materials, School of Materials Science and Engineering, University of Science and Technology Beijing , Beijing 100083, P. R. China
| | - Fu Tang
- State Key Laboratory for Advanced Metals and Materials, School of Materials Science and Engineering, University of Science and Technology Beijing , Beijing 100083, P. R. China
| | - Liangzhen Tang
- State Key Laboratory for Advanced Metals and Materials, School of Materials Science and Engineering, University of Science and Technology Beijing , Beijing 100083, P. R. China
| | - Lidong Li
- State Key Laboratory for Advanced Metals and Materials, School of Materials Science and Engineering, University of Science and Technology Beijing , Beijing 100083, P. R. China
- State Key Laboratory of Fine Chemicals, Dalian University of Technology , Dalian 116024, P. R. China
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31
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Li Y, Zhang N, Zhao WW, Jiang DC, Xu JJ, Chen HY. Polymer Dots for Photoelectrochemical Bioanalysis. Anal Chem 2017; 89:4945-4950. [DOI: 10.1021/acs.analchem.7b00162] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Yu Li
- State Key Laboratory of Analytical
Chemistry for Life Science and Collaborative Innovation Center of
Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, Jiangsu 210023, China
| | - Nan Zhang
- State Key Laboratory of Analytical
Chemistry for Life Science and Collaborative Innovation Center of
Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, Jiangsu 210023, China
| | - Wei-Wei Zhao
- State Key Laboratory of Analytical
Chemistry for Life Science and Collaborative Innovation Center of
Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, Jiangsu 210023, China
| | - De-Chen Jiang
- State Key Laboratory of Analytical
Chemistry for Life Science and Collaborative Innovation Center of
Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, Jiangsu 210023, China
| | - Jing-Juan Xu
- State Key Laboratory of Analytical
Chemistry for Life Science and Collaborative Innovation Center of
Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, Jiangsu 210023, China
| | - Hong-Yuan Chen
- State Key Laboratory of Analytical
Chemistry for Life Science and Collaborative Innovation Center of
Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, Jiangsu 210023, China
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32
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Schmidt MM, Wu S, Cui Z, Nguyen NT, Faulkner M, Saunders BR. How gold nanoparticles can be used to probe the structural changes of a pH-responsive hydrogel. Phys Chem Chem Phys 2017; 19:5102-5112. [PMID: 28138660 DOI: 10.1039/c6cp07929f] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Gold nanoparticles (GNPs) have UV-visible absorption spectra that are highly sensitive to their local environment due to their surface plasmon resonance (SPR). Furthermore, GNPs are able to quench the fluorescence of suitable dyes depending on the GNP-dye separation. Both of these features have led to the use of GNPs as spectroscopic rulers. In this study we sought to use GNPs as spectroscopic probes to investigate the local structural changes associated with the macroscopic pH-triggered swelling/de-swelling transitions of a pH-responsive hydrogel. The hydrogel used in this study comprised covalently inter-linked pH-responsive poly(ethylacrylate-co-methacrylic acid-co-divinyl benzene) microgel particles (MGs). MGs are crosslinked polymer colloids that swell when the pH approaches the pKa of the constituent polymer. The interlinked MG hydrogels are termed doubly crosslinked microgels (DX MGs) and are a new family of hydrogels. They had polymer volume fractions (ϕp) that strongly decreased as the pH increased. UV-visible spectra showed that the wavelength of the SPR absorption (λmax) for the DX MG/GNP gels was pH-responsive. A linear relationship was found between λmax and ϕp for ϕp values up to ∼0.80. The inclusion of Rhodamine 6G within the DX MG/GNP hydrogels resulted in metal-induced fluorescence quenching which was studied using photoluminescence (PL) spectroscopy. The extent of quenching was pH-dependent and was also proportional to ϕp. The results of the study showed that the pH-triggered changes of the nanoscale and macroscopic swelling for the DX MGs were similar and imply that affine swelling occurred, which is a new observation. The data suggest that UV-visible or PL spectroscopy could be used to study the swelling of pH-responsive hydrogels containing GNPs remotely.
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Affiliation(s)
- Maximilian M Schmidt
- School of Materials, MSS Tower, The University of Manchester, Manchester, M13 9PL, UK. and Institute of Physical Chemistry, RWTH Aachen University, Landoltweg 2, D-52056, Aachen, Germany
| | - Shanglin Wu
- School of Materials, MSS Tower, The University of Manchester, Manchester, M13 9PL, UK.
| | - Zhengxing Cui
- School of Materials, MSS Tower, The University of Manchester, Manchester, M13 9PL, UK.
| | - Nam T Nguyen
- School of Materials, MSS Tower, The University of Manchester, Manchester, M13 9PL, UK.
| | - Michael Faulkner
- School of Materials, MSS Tower, The University of Manchester, Manchester, M13 9PL, UK.
| | - Brian R Saunders
- School of Materials, MSS Tower, The University of Manchester, Manchester, M13 9PL, UK.
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