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Venkadajapathy VRT, Sivaramakrishnan S. Enhancing bacterial control and daylight-driven water remediation with chitosan-impregnated MoC nanosheets. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024; 31:44938-44951. [PMID: 38954335 DOI: 10.1007/s11356-024-33886-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2023] [Accepted: 05/29/2024] [Indexed: 07/04/2024]
Abstract
The functionalization of nanoparticles with 2D nanosheets is an effective approach to enhance their functional properties for pollutant removal. This research outlines the synthesis of a 2D-delaminated molybdenum carbide (MXene) chitosan nanocomposite (2D-d-Mo2CTx-Cs NC) with bacterial control and photocatalytic properties for dye adsorption. The nanocomposite includes Tx-surface terminating groups O, OH, and F. In this investigation, the composite was synthesized using the etching method and its formation was confirmed through UV spectra at 288 nm. It was characterized through FTIR, XRD, Particle size, Zetapotential, FESEM, HRTEM, EDAX, and XPS analyses. FTIR spectral analysis of NC suggests that amines are formed through a Schiff base reaction between glutaraldehyde and Cs, or through the interaction of terminal aldehydes and carbonyl groups. The XRD analysis confirmed the crystalline structure of the composite. FESEM images revealed irregularly structured nanosheets (NSs) material in the prepared 2D-d-Mo2CTx-Cs NC samples. HRTEM images revealed 2D-d-Mo2CTx NSs impregnated onto Cs with an average size of 50 nm, as confirmed by a particle size analyzer, with a zeta potential value of - 15 mV. Additionally, Mo, C, N, and O are the most significant elements present in the NC, as confirmed by EDAX and XPS analyses. Further, biocompatibility testing of 2D-d-Mo2CTx-Cs NC yielded positive results. Moreover, under sunlight, the composites effectively adsorbed methylene blue with a 90% adsorption capacity, as confirmed by kinetic studies. Furthermore, the synergistic effect of Cs and d-Mo2CTx NSs resulted in significant antibacterial (50-200 µl of 1 mg/ml) and antibiofilm activity (100 µl of 1 mg/ml) against pathogenic bacteria. Furthermore, this study represents the first report on the use of 2D-d-Mo2CTx-Cs NC for daylight-influenced photocatalytic applications with a bacteria-controlling effect.
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Kumar P, Parashar M, Chauhan K, Chakraborty N, Sarkar S, Chandra A, Das NS, Chattopadhyay KK, Ghoari A, Adalder A, Ghorai UK, Saini S, Agarwal D, Ghosh S, Srivastava P, Banerjee D. Significant enhancement in the cold emission characteristics of chemically synthesized super-hydrophobic zinc oxide rods by nickel doping. NANOSCALE ADVANCES 2023; 5:6944-6957. [PMID: 38059027 PMCID: PMC10696928 DOI: 10.1039/d3na00776f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/13/2023] [Accepted: 10/28/2023] [Indexed: 12/08/2023]
Abstract
The current article presents a huge enhancement in the field emission characteristics of zinc oxide (ZnO) micro/nanorods by nickel doping. The synthesis of pure and nickel-doped zinc oxide (ZnO) micro/nanorods was done by a simple low-temperature chemical method. Both the as-prepared pure and doped samples were analyzed by X-ray diffraction and electron microscopy to confirm the proper phase formation and the developed microstructure. UV-vis transmittance spectra helped in determining the band gap of the samples. Fourier-Transform Infrared Spectroscopy (FTIR) spectra showed the different bonds present in the sample, whereas X-ray Photoelectron Spectroscopy (XPS) confirmed the presence of nickel in the doped sample. Photoluminescence (PL) spectra showed that after doping, the band-to-band transition was affected, whereas defect-induced transition had increased significantly. After the nickel doping, contact angle measurement revealed a significant decrease in the sample's surface energy, leading to a remarkably high water contact angle (within the superhydrophobic region). Simulation through ANSYS suggested that the doped sample has the potential to function as an efficient cold emitter, which was also verified experimentally. The cold emission characteristics of the doped sample showed a significant improvement, with the turn-on field (corresponding to J = 1 μA cm-2) reduced from 5.34 to 2.84 V μm-1. The enhancement factor for the doped sample reached 3426, approximately 1.5 times higher compared to pure ZnO. Efforts have been made to explain the results, given the favorable band bending as well as the increased number of effective emission sites.
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Affiliation(s)
- P Kumar
- Thin Film and Nanotechnology Laboratory, Faculty of Engineering and Computing Sciences, Teerthanker Mahaveer University Moradabad UP 244001 India
| | - M Parashar
- Thin Film and Nanotechnology Laboratory, Faculty of Engineering and Computing Sciences, Teerthanker Mahaveer University Moradabad UP 244001 India
| | - K Chauhan
- Thin Film and Nanotechnology Laboratory, Faculty of Engineering and Computing Sciences, Teerthanker Mahaveer University Moradabad UP 244001 India
| | - N Chakraborty
- Thin Film and Nanoscience Laboratory, Department of Physics, Jadavpur University Kolkata West Bengal 700032 India
| | - S Sarkar
- Thin Film and Nanoscience Laboratory, Department of Physics, Jadavpur University Kolkata West Bengal 700032 India
| | - A Chandra
- Thin Film and Nanoscience Laboratory, Department of Physics, Jadavpur University Kolkata West Bengal 700032 India
| | - N S Das
- Department of Basic Science and Humanities, Techno International Batanagar Maheshtala Kolkata 700141 India
| | - K K Chattopadhyay
- Thin Film and Nanoscience Laboratory, Department of Physics, Jadavpur University Kolkata West Bengal 700032 India
| | - A Ghoari
- Department of Industrial Chemistry, Ramakrishna Mission Vidyamandira Belur Math Howrah-711202 India
| | - A Adalder
- Department of Industrial Chemistry, Ramakrishna Mission Vidyamandira Belur Math Howrah-711202 India
| | - U K Ghorai
- Department of Industrial Chemistry, Ramakrishna Mission Vidyamandira Belur Math Howrah-711202 India
| | - S Saini
- Department of Physics, Indian Institute of Technology Hauz Khas South West Delhi 110016 India
| | - D Agarwal
- Department of Physics, Indian Institute of Technology Hauz Khas South West Delhi 110016 India
| | - S Ghosh
- Department of Physics, Indian Institute of Technology Hauz Khas South West Delhi 110016 India
| | - P Srivastava
- Department of Physics, Indian Institute of Technology Hauz Khas South West Delhi 110016 India
| | - D Banerjee
- Thin Film and Nanotechnology Laboratory, Faculty of Engineering and Computing Sciences, Teerthanker Mahaveer University Moradabad UP 244001 India
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Li J, Wang Q, Xia G, Adilijiang N, Li Y, Hou Z, Fan Z, Li J. Recent Advances in Targeted Drug Delivery Strategy for Enhancing Oncotherapy. Pharmaceutics 2023; 15:2233. [PMID: 37765202 PMCID: PMC10534854 DOI: 10.3390/pharmaceutics15092233] [Citation(s) in RCA: 18] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2023] [Revised: 08/04/2023] [Accepted: 08/21/2023] [Indexed: 09/29/2023] Open
Abstract
Targeted drug delivery is a precise and effective strategy in oncotherapy that can accurately deliver drugs to tumor cells or tissues to enhance their therapeutic effect and, meanwhile, weaken their undesirable side effects on normal cells or tissues. In this research field, a large number of researchers have achieved significant breakthroughs and advances in oncotherapy. Typically, nanocarriers as a promising drug delivery strategy can effectively deliver drugs to the tumor site through enhanced permeability and retention (EPR) effect-mediated passive targeting and various types of receptor-mediated active targeting, respectively. Herein, we review recent targeted drug delivery strategies and technologies for enhancing oncotherapy. In addition, we also review two mainstream drug delivery strategies, passive and active targeting, based on various nanocarriers for enhancing tumor therapy. Meanwhile, a comparison and combination of passive and active targeting are also carried out. Furthermore, we discuss the associated challenges of passive and active targeted drug delivery strategies and the prospects for further study.
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Affiliation(s)
- Jianmin Li
- College of Life Science and Technology & Institute of Materia Medica, Xinjiang University, Urumqi 830017, China; (J.L.); (Q.W.); (G.X.); (N.A.)
| | - Qingluo Wang
- College of Life Science and Technology & Institute of Materia Medica, Xinjiang University, Urumqi 830017, China; (J.L.); (Q.W.); (G.X.); (N.A.)
| | - Guoyu Xia
- College of Life Science and Technology & Institute of Materia Medica, Xinjiang University, Urumqi 830017, China; (J.L.); (Q.W.); (G.X.); (N.A.)
| | - Nigela Adilijiang
- College of Life Science and Technology & Institute of Materia Medica, Xinjiang University, Urumqi 830017, China; (J.L.); (Q.W.); (G.X.); (N.A.)
| | - Ying Li
- Xiamen Key Laboratory of Traditional Chinese Bio-Engineering, Xiamen Medical College, Xiamen 361021, China
| | - Zhenqing Hou
- College of Materials, Xiamen University, Xiamen 361002, China;
| | - Zhongxiong Fan
- College of Life Science and Technology & Institute of Materia Medica, Xinjiang University, Urumqi 830017, China; (J.L.); (Q.W.); (G.X.); (N.A.)
| | - Jinyao Li
- College of Life Science and Technology & Institute of Materia Medica, Xinjiang University, Urumqi 830017, China; (J.L.); (Q.W.); (G.X.); (N.A.)
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Šarić A, Despotović I. Hydrogen Bonds as Stability-Controlling Elements of Spherical Aggregates of ZnO Nanoparticles: A Joint Experimental and Theoretical Approach. MATERIALS (BASEL, SWITZERLAND) 2023; 16:4843. [PMID: 37445157 DOI: 10.3390/ma16134843] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/14/2023] [Revised: 07/03/2023] [Accepted: 07/04/2023] [Indexed: 07/15/2023]
Abstract
The effects of various organic additives, such as diethanolamine (DEA) and ethanolamine (EA), and variations in aging times on the formation and stability mechanisms of spherical aggregates of ZnO nanoparticles (NPs) prepared by using solvothermal synthesis were studied. The experimental results of the structural, morphological and optical properties monitored by using X-ray diffraction, field-emission scanning electron microscopy (FE-SEM) and UV-Vis spectroscopy were supported by quantum chemical calculations at the level of density functional theory (DFT). Understanding the mechanism of spherical ZnO aggregate formation and its stability by mimicking the processes at the computer level was achieved through theoretical simulations of the ZnO surface/additive interactions using (ZnO)36-DEA and (ZnO)36-EA models. The fine-tuned spherical aggregation of ZnO nanoparticles was driven by various interactions, in particular, strong O-H∙∙∙O and weak N-H∙∙∙O hydrogen bonds as controlling interactions. The calculated negative free release energy, ∆G*INT, indicates that the ZnO surface/additive interaction in diethanolamine media is a spontaneous exergonic process (∆G*INT = -7.73 kcal mol-1), whereas, in ethanolamine media, it is an unfavorable, slightly endergonic process (∆G*INT > 0). The presence of two strong O-H∙∙∙O hydrogen bonds and, at the same time, a weaker N-H∙∙∙O hydrogen bond is the key factor for the very good and long-term aggregate stability of ZnO NPs in DEA media. This integrated experimental-theoretical study highlights the stability and compactness of spherical ZnO aggregates of ZnO NPs, prepared in the presence of diethanolamine compared to ethanolamine media, and provides a promising method and flexible design of ZnO nanomaterials to improve their adsorptive and optical properties.
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Affiliation(s)
- Ankica Šarić
- Division of Materials Physics, Ruđer Bošković Institute, Centre of Excellence for Advanced Materials and Sensing Devices, Bijenička 54, HR-10002 Zagreb, Croatia
| | - Ines Despotović
- Division of Physical Chemistry, Ruđer Bošković Institute, Bijenička 54, HR-10002 Zagreb, Croatia
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Salahuddin N, Awad S, Elfiky M. Vanillin-crosslinked chitosan/ZnO nanocomposites as a drug delivery system for 5-fluorouracil: study on the release behavior via mesoporous ZrO 2-Co 3O 4 nanoparticles modified sensor and antitumor activity. RSC Adv 2022; 12:21422-21439. [PMID: 35975070 PMCID: PMC9346502 DOI: 10.1039/d2ra02717h] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2022] [Accepted: 06/23/2022] [Indexed: 01/10/2023] Open
Abstract
Herein, a series of vanillin-crosslinked chitosan (Vn-CS) nanocomposites (NCs) containing various contents of ZnO nanoparticles (NPs) was prepared and characterized via FTIR spectroscopy, XRD, TGA, SEM and TEM. Changing the weight% of ZnO NPs in the prepared NCs resulted in an improvement in their antibacterial activity against Gram-negative and Gram-positive bacteria strains compared with the unmodified CS, and the encapsulation efficiency of 5-fluorouracil (5-FU) was found to be in the range of 61.4–69.2%. Subsequently, the release of 5-FU was monitored utilizing the mesoporous ZrO2–Co3O4 NPs modified carbon paste sensor via the square-wave adsorptive anodic stripping voltammetry (SW-AdASV) technique. Also, the release mechanism of 5-FU from each NC was studied by applying the zero-order, first-order, Hixson–Crowell and Higuchi models to the experimental results. The cytotoxicity of prepared NCs and 5-FU-encapsulated NCs was evaluated against the HePG-2, MCF-7 and HCT-116 cancer cell lines, in addition to the WI-38 and WISH normal cell lines using the MTT assay. Notably, 5-FU/CV10 NC exhibited the highest antitumor activity towards all tested cancer cell lines and a moderate activity against WI-38 and WISH normal cell lines with IC50 values of 28.02 ± 2.5 and 31.65 ± 2.7 μg mL−1, respectively. The obtained nanocomposites exhibited suitable selectivity with minimum toxicity against normal cells. Herein, a series of vanillin-crosslinked chitosan (Vn-CS) nanocomposites (NCs) containing various contents of ZnO nanoparticles (NPs) was prepared and characterized via FTIR spectroscopy, XRD, TGA, SEM and TEM.![]()
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Affiliation(s)
| | - Salem Awad
- Chemistry Department, Faculty of Science Tanta 31527 Egypt
| | - Mona Elfiky
- Chemistry Department, Faculty of Science Tanta 31527 Egypt
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Ullah A, Lim SI. Plant Extract-Based Synthesis of Metallic Nanomaterials, Their Applications, and Safety Concerns. Biotechnol Bioeng 2022; 119:2273-2304. [PMID: 35635495 DOI: 10.1002/bit.28148] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2021] [Revised: 04/12/2022] [Accepted: 05/19/2022] [Indexed: 11/06/2022]
Abstract
Nanotechnology has attracted the attention of researchers from different scientific fields because of the escalated properties of nanomaterials compared with the properties of macromolecules. Nanomaterials can be prepared through different approaches involving physical and chemical methods. The development of nanomaterials through plant-based green chemistry approaches is more advantageous than other methods from the perspectives of environmental safety, animal, and human health. The biomolecules and metabolites of plants act as reducing and capping agents for the synthesis of metallic green nanomaterials. Plant-based synthesis is a preferred approach as it is not only cost-effective, easy, safe, clean, and eco-friendly but also provides pure nanomaterials in high yield. Since nanomaterials have antimicrobial and antioxidant potential, green nanomaterials synthesized from plants can be used for a variety of biomedical and environmental remediation applications. Past studies have focused mainly on the overall biogenic synthesis of individual or combinations of metallic nanomaterials and their oxides from different biological sources, including microorganisms and biomolecules. Moreover, from the viewpoint of biomedical applications, the literature is mainly focusing on synthetic nanomaterials. Herein, we discuss the extraction of green molecules and recent developments in the synthesis of different plant-based metallic nanomaterials, including silver, gold, platinum, palladium, copper, zinc, iron, and carbon. Apart from the biomedical applications of metallic nanomaterials, including antimicrobial, anticancer, diagnostic, drug delivery, tissue engineering, and regenerative medicine applications, their environmental remediation potential is also discussed. Furthermore, safety concerns and safety regulations pertaining to green nanomaterials are also discussed. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- Aziz Ullah
- Department of Chemical Engineering, Pukyong National University, Busan, 48513, Republic of Korea.,Gomal Centre of Pharmaceutical Sciences, Faculty of Pharmacy, Gomal University Dera Ismail Khan, 29050, Khyber Pakhtunkhwa, Pakistan
| | - Sung In Lim
- Department of Chemical Engineering, Pukyong National University, Busan, 48513, Republic of Korea
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Li X, Li X, Feng S. A photoelectrochemical sensor for firstly the detection of amlodipine besylate based on an MnC<sub>4</sub>Pc coated ZnO composite materials. ELECTROANAL 2022. [DOI: 10.1002/elan.202100703] [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]
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8
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Rahman TU, Anwar MR, Zeb MA, Liaqat W. Green synthesis, characterization, antibacterial activity of metal nanoparticles and composite oxides using leaves extract of Ocimum basilicum L. Microsc Res Tech 2022; 85:2857-2865. [PMID: 35460328 DOI: 10.1002/jemt.24134] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2021] [Revised: 04/04/2022] [Accepted: 04/14/2022] [Indexed: 11/06/2022]
Abstract
Nanoparticles plays a key role in the development of novel antibacterial substances against various pathogenic microorganisms. These nanoparticles due to their smaller size could be very effective as they can improve the antibacterial activity through lysis of bacterial cell wall. In the present research work, ZnO, MgO, NiO, AlO nanoparticles, and MgNiO, and AlZnO composite oxides were synthesized by green method from Ocimum basilicum leaves extract. The nanoparticles formed were evaluated using FTIR, XRD, EDX, and SEM to confirm the formation of NPs and to determine the morphology, elemental composition, shape and size, composition, and nature of bonds present in the NPs. Further, the NPs were tested for their antibacterial activity. In particular, ZnO NPs showed a good inhibitory effect against Pseudomonas aeruginosa with 20 mm zone of inhibition. Hence, the process reported herein could be optimized for large-scale preparation of NPs.
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Affiliation(s)
- Taj Ur Rahman
- Department of Chemistry, Mohi-Ud-Din Islamic University, AJ&K, Pakistan
| | | | | | - Wajiha Liaqat
- Department of Chemistry, Mohi-Ud-Din Islamic University, AJ&K, Pakistan
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Vignesh K, Sivaganesh D, Saravanakumar S, Rani MP. Ho 3+-Induced ZnO: Structural, Electron Density Distribution and Antibacterial Activity for Biomedical Application. Appl Biochem Biotechnol 2022; 195:3941-3965. [PMID: 35298766 DOI: 10.1007/s12010-022-03865-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2021] [Accepted: 02/24/2022] [Indexed: 11/02/2022]
Abstract
The current investigation focused on the synthesis and characterization of Zn1-xHoxO (X = 0, 0.02, 0.04, 0.06, and 0.08) materials. The rare-earth Ho3+-doped ZnO materials have been prepared using a chemical precipitation process. The phase pure hexagonal structured ZnO crystal system has been observed by powder X-ray diffraction (XRD) characterization. The detailed structural analysis of prepared materials has been investigated by the Rietveld refinement method. The surface morphology and elemental composition of the prepared materials have been characterized using scanning electron microscopy (SEM) and energy-dispersive spectroscopy (EDAX). The presence of vibrational links associated with various functional groups has been displayed by FTIR spectroscopy. The energy gap of synthesized materials has been studied using UV-Vis spectroscopy. To study the luminescence activity of produced materials, photoluminescence (PL) analysis has been utilized. The light-green emission at around 507 nm has been obtained by synthesized materials under 380-nm excitation. In addition, the electron density distribution has been accomplished in synthesized materials. At 6% of Ho3+, substituted ZnO exposes the maximum covalent and ionic nature between Zn-O bond along with horizontal and vertical axis, respectively. Moreover, the antibacterial activity of synthesized materials has been done through Proteus vulgaris and Enterococcus faecalis. Following that the destruction of human red blood cells has been examined by hemolysis investigation. All experimental results suggested that the 6% of Ho3+ dopant is the optimized level of ZnO host lattice. The present work paves a promising path to get efficient material for biomedical applications.
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Affiliation(s)
- K Vignesh
- Research Centre & PG, Department of Physics, The Madura College, Madurai, Tamil Nadu, 625011, India
| | - D Sivaganesh
- Department of Physics, Kalasalingam Academy of Research and Education, Krishnan Kovil, Tamil Nadu, 626126, India
| | - S Saravanakumar
- Department of Physics, Kalasalingam Academy of Research and Education, Krishnan Kovil, Tamil Nadu, 626126, India
| | - M Prema Rani
- Research Centre & PG, Department of Physics, The Madura College, Madurai, Tamil Nadu, 625011, India.
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Atanasova P, Dou M, Kousik SR, Bill J, Fyta M. Adsorption of azide-functionalized thiol linkers on zinc oxide surfaces. RSC Adv 2021; 11:5466-5478. [PMID: 35423087 PMCID: PMC8694732 DOI: 10.1039/d0ra05127f] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2020] [Accepted: 12/18/2020] [Indexed: 12/16/2022] Open
Abstract
A comprehensive understanding of the interactions between organic molecules and a metal oxide surface is essential for an efficient surface modification and the formation of organic-inorganic hybrids with technological applications ranging from heterogeneous catalysis and biomedical templates up to functional nanoporous matrices. In this work, first-principles calculations supported by experiments are used to provide the microstructural characteristics of (101̄0) surfaces of zinc oxide single crystals modified by azide terminated hydrocarbons, which graft on the oxide through a thiol group. On the computational side, we evaluate the specific interactions between the surface and the molecules with the chemical formula N3(CH2) n SH, with n = 1, 3, 6, 9. We demonstrate that the molecules chemisorb on the bridge site of ZnO(101̄0). Upon adsorption, the N3(CH2) n SH molecules break the neutral (Zn δ+-O δ-) dimers on ZnO(101̄0) resulting in a structural distortion of the ZnO(101̄0) substrate. The energy decomposition analysis revealed that such structure distortion favors the adsorption of the molecules on the surface leading to a strong correlation between the surface distortion energy and the interaction energy of the molecule. An azide-terminated thiol with three methylene groups in the hydrocarbon chain N3(CH2)3SH was synthesized, and the assembly of this linker on ZnO surfaces was confirmed through atomic force microscopy. The bonding to the inorganic surface was examined via X-ray photoelectron spectroscopy (XPS). Clear signatures of the organic components on the oxide substrates were observed underlying the successful realization of thiol-grafting on the metal oxide. Temperature-dependent and angle-resolved XPS were applied to examine the thermal stability and to determine the thickness of the grafted SAMs, respectively. We discuss the high potential of our hybrid materials in providing further functionalities towards heterocatalysis and medical applications.
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Affiliation(s)
- Petia Atanasova
- Institute for Materials Science, University of Stuttgart Heisenbergstr. 3 70569 Stuttgart Germany
| | - Maofeng Dou
- Institute for Computational Physics, University of Stuttgart Allmandring 3 70569 Stuttgart Germany
| | - Shravan R Kousik
- Institute for Materials Science, University of Stuttgart Heisenbergstr. 3 70569 Stuttgart Germany
| | - Joachim Bill
- Institute for Materials Science, University of Stuttgart Heisenbergstr. 3 70569 Stuttgart Germany
| | - Maria Fyta
- Institute for Computational Physics, University of Stuttgart Allmandring 3 70569 Stuttgart Germany
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Prasad KS, Prasad SK, Ansari MA, Alzohairy MA, Alomary MN, AlYahya S, Srinivasa C, Murali M, Ankegowda VM, Shivamallu C. Tumoricidal and Bactericidal Properties of ZnONPs Synthesized Using Cassia auriculata Leaf Extract. Biomolecules 2020; 10:E982. [PMID: 32630019 PMCID: PMC7407615 DOI: 10.3390/biom10070982] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2020] [Revised: 06/25/2020] [Accepted: 06/25/2020] [Indexed: 01/08/2023] Open
Abstract
In this work, we aimed to synthesize zinc oxide nanoparticles (ZnONPs) using an aqueous extract of Cassia auriculata leaves (CAE) at room temperature without the provision of additional surfactants or capping agents. The formation of as-obtained ZnONPs was analyzed by UV-visible (ultraviolet) absorption and emission spectroscopy, X-ray photoemission spectroscopy (XPS), X-ray diffraction analysis (XRD), energy dispersive X-ray diffraction (EDX), thermogravimetric analysis/differential thermal analysis (TGA-DTA), scanning electron microscopy (SEM), transmission electron microscopy (TEM), high-resolution transmission electron microscopy (HRTEM), and selected area electron diffraction (SAED). The XRD results reflect the wurtzite structure of as-prepared ZnONPs, which produced diffraction patterns showing hexagonal phases. The SEM images indicate that the morphology of as-prepared ZnONPs is composed of hexagonal nanostructures with an average diameter of 20 nm. The HR-TEM result shows that the inter-planar distance between two lattice fringes is 0.260 nm, which coincides with the distance between the adjacent (d-spacing) of the (002) lattice plane of ZnO. The fluorescence emission spectrum of ZnONPs dispersed in ethanol shows an emission maximum at 569 nm, revealing the semiconductor nature of ZnO. As-obtained ZnONPs enhanced the tumoricidal property of CAE in MCF-7 breast cancer cells without significant inhibition of normal human breast cells, MCF-12A. Furthermore, we have studied the antibacterial effects of ZnONPs, which showed direct cell surface contact, resulting in the disturbance of bacterial cell integrity.
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Affiliation(s)
- Kollur Shiva Prasad
- Department of Sciences, Amrita School of Arts and Sciences, Amrita Vishwa Vidyapeetham, Mysuru Campus, Mysuru, Karnataka–570 026, India
| | - Shashanka K. Prasad
- Department of Biotechnology and Bioinformatics, School of Life Sciences, JSS Academy of Higher Education and Research, Mysuru, Karnataka–570 015, India;
| | - Mohammad Azam Ansari
- Department of Epidemic Disease Research, Institutes for Research and Medical Consultations (IRMC), Imam Abdulrahman Bin Faisal University, Dammam 31441, Saudi Arabia
| | - Mohammad A. Alzohairy
- Department of Medical Laboratories, College of Applied Medical Sciences, Qassim University, Qassim 51431, Saudi Arabia;
| | - Mohammad N. Alomary
- National Center for Biotechnology, Life Science and Environmental Research Institute, King Abdulaziz City for Science and Technology, P.O. Box 6086, Riyadh 12354, Saudi Arabia;
| | - Sami AlYahya
- National Center for Biotechnology, King Abdulaziz City for Science and Technology, P.O. Box 6086, Riyadh 12354, Saudi Arabia;
| | | | - Mahadevamurthy Murali
- Department of Studies in Botany, University of Mysore, Manasagangotri, Mysuru 570 006, Karnataka, India;
| | - Veena Malligere Ankegowda
- Department of Chemistry, Bangalore Institute of Technology, K.R. Road, V V Puram, Karnataka, Bangalore 560 004, India;
| | - Chandan Shivamallu
- Department of Biotechnology and Bioinformatics, School of Life Sciences, JSS Academy of Higher Education and Research, Mysuru, Karnataka–570 015, India;
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12
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Selim YA, Azb MA, Ragab I, H M Abd El-Azim M. Green Synthesis of Zinc Oxide Nanoparticles Using Aqueous Extract of Deverra tortuosa and their Cytotoxic Activities. Sci Rep 2020; 10:3445. [PMID: 32103090 PMCID: PMC7044426 DOI: 10.1038/s41598-020-60541-1] [Citation(s) in RCA: 166] [Impact Index Per Article: 41.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2019] [Accepted: 09/25/2019] [Indexed: 01/13/2023] Open
Abstract
In recent years, there is a growing interest towards the green synthesis of metal nanoparticles, particularly from plants; however, yet no published study on the synthesis of ZnO.NPs using the Deverra tortuosa extract. Through this study, zinc oxide nanoparticles (ZnO.NPs) have been synthesized based on using the environmentally benign extract of the aerial parts of D. tortuosa as a reducing and capping agent. ZnO.NPs synthesis was confirmed using UV-Visible (UV-Vis) spectroscopy, Fourier Transform Infrared Spectroscopy (FTIR), X-ray Diffraction (XRD) and High Resolution-Transmission Electron Microscope (HR-TEM). The qualitative and quantitative analyses of plant extract were done. The potential anticancer activity was in vitro investigated against two cancer cell lines (human colon adenocarcinoma "Caco-2" and human lung adenocarcinoma "A549") compared to their activities on the human lung fibroblast cell line (WI38) using the MTT assay. Both the aqueous extract and ZnO.NPs showed a remarkable selective cytotoxicity against the two examined cancer cell lines.
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Affiliation(s)
- Yasser A Selim
- Faculty of Specific Education, Zagazig University, Zagazig, 44519, Egypt.
| | - Maha A Azb
- Botany Department, Faculty of Science, Zagazig University, Zagazig, 44519, Egypt
| | - Islam Ragab
- Faculty of Science and Arts, Riyad Alkhabra, Qassim University, Qassim, Saudi Arabia
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13
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Yang X, Wang H, Dou W, Wang P, Yang X, Pan X, Lu B, Mao H. Enhanced photoresponse of epitaxially grown ZnO by MoO3 surface functionalization. Phys Chem Chem Phys 2020; 22:2399-2404. [DOI: 10.1039/c9cp06667e] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Enhanced photoresponse of epitaxially grown ZnO has been observed with MoO3 surface functionalization, which is attributed to the larger upward band bending at the interface.
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Affiliation(s)
- XiangDong Yang
- Department of Physics
- Hangzhou Normal University
- Hangzhou 311121
- China
| | - HaiTao Wang
- Department of Physics
- Hangzhou Normal University
- Hangzhou 311121
- China
| | - WeiDong Dou
- Laboratory of Low-Dimensional Carbon Materials
- Physics Department
- Shaoxing University
- Shaoxing
- China
| | - Peng Wang
- Department of Applied Physics
- College of Electronic and Information Engineering
- Shandong University of Science and Technology
- Qingdao
- China
| | - XuXin Yang
- Department of Physics
- Hangzhou Normal University
- Hangzhou 311121
- China
| | - XinHua Pan
- State Key Laboratory of Silicon Materials
- School of Materials Science and Engineering
- Zhejiang University
- Hangzhou 310027
- China
| | - Bin Lu
- State Key Laboratory of Silicon Materials
- School of Materials Science and Engineering
- Zhejiang University
- Hangzhou 310027
- China
| | - HongYing Mao
- Department of Physics
- Hangzhou Normal University
- Hangzhou 311121
- China
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14
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Mitra P, Dutta D, Das S, Basu T, Pramanik A, Patra A. Antibacterial and Photocatalytic Properties of ZnO-9-Aminoacridine Hydrochloride Hydrate Drug Nanoconjugates. ACS OMEGA 2018; 3:7962-7970. [PMID: 30087929 PMCID: PMC6072247 DOI: 10.1021/acsomega.8b00568] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/26/2018] [Accepted: 07/05/2018] [Indexed: 05/23/2023]
Abstract
The development of nanomaterial-based hybrid systems for healthcare and energy-related materials has attracted significant attention nowadays. Here, we have designed a nanocomposite of ZnO nanoparticles (NPs) with anticancer therapeutic drug 9-aminoacridine hydrochloride hydrate (9AA-HCl) for antibacterial and photocatalytic activities. Spectroscopic studies reveal that the photoinduced electron transfer from photoexcited 9AA-HCl to the conduction band of ZnO NP causes the generation of the reactive oxygen species (ROS), which is responsible for antibacterial activity and photocatalytic properties. It is seen that the efficiency of photodegradation of dye molecules increases in ZnO-9AA-HCl nanoconjugated systems than pure ZnO nanoparticles because of efficient charge separation. In addition, the antibacterial efficacy of the nanoconjugate is investigated using a strain of Gram-negative bacteria where the cell-killing activities are observed 99.99 and 100% for 20 and 21 μL/mL nanoconjugate, respectively, and very little cell-killing activity is observed for free ZnO NPs and free drug. Moreover, it is also observed that the nanoconjugate generates sufficient intracellular ROS that can hydrolyze 2',7'-dichlorodihydrofluoresceindiacetate (DCFH-DA) to highly fluorescent 2',7'-dichlorofluorescein (DCF). The outcome of the study will provide valuable information for designing new-edge nanoconjugate materials for potential applications in photocatalytic and antibacterial activities.
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Affiliation(s)
- Piyali Mitra
- Department
of Materials Science, Indian Association
for the Cultivation of Science, Kolkata 700032, India
| | - Debanjan Dutta
- Department
of Biochemistry and Biophysics, University of Kalyani, Kalyani 741235, West Bengal, India
| | - Somnath Das
- Unilever
R&D Bangalore, 64,
Main Road, Whitefield, Bangalore 560066, India
| | - Tarakdas Basu
- Department
of Biochemistry and Biophysics, University of Kalyani, Kalyani 741235, West Bengal, India
| | - Amitava Pramanik
- Unilever
R&D Bangalore, 64,
Main Road, Whitefield, Bangalore 560066, India
| | - Amitava Patra
- Department
of Materials Science, Indian Association
for the Cultivation of Science, Kolkata 700032, India
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15
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Artesani A, Gherardi F, Mosca S, Alberti R, Nevin A, Toniolo L, Valentini G, Comelli D. On the photoluminescence changes induced by ageing processes on zinc white paints. Microchem J 2018. [DOI: 10.1016/j.microc.2018.03.032] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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16
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Jamdegni M, Kaur-Ghumaan S, Kaur A. Study of polyaniline and functionalized ZnO composite film linked through a binding agent for efficient and stable electrochromic applications. Electrochim Acta 2017. [DOI: 10.1016/j.electacta.2017.08.144] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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17
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Mahanta S, Prathap S, Ban DK, Paul S. Protein functionalization of ZnO nanostructure exhibits selective and enhanced toxicity to breast cancer cells through oxidative stress-based cell death mechanism. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2017. [DOI: 10.1016/j.jphotobiol.2017.06.015] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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18
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Cox R, Olson GT, Pfau M, Eshaghi N, Barcus K, Ramirez D, Fernando R, Zhang S. Solution-Based Large-Area Assembly of Coaxial Inorganic-Organic Hybrid Nanowires for Fast Ambipolar Charge Transport. ACS APPLIED MATERIALS & INTERFACES 2017; 9:16397-16403. [PMID: 28467710 DOI: 10.1021/acsami.7b01413] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Donor-acceptor interfacial microstructures and fast ambipolar charge transport are pivotal in determining the device performance of inorganic-organic hybrid photovoltaics. Here, we report on a series of one-dimensional coaxial p-n junction core-shell nanohybrids formed by direct side-on attachment of carboxylated poly(3-alkylthiophene)s onto single-crystalline ZnO nanowires. The diameter of pristine ZnO nanowires is ∼30 nm, and the conjugated polymer forms a 2-10 nm shell around each nanowire. Spectroscopic studies on the resulting core-shell hybrid nanowires show an elongated conjugation length of the poly(3-alkylthiophene) backbone and fast electron transfer via ordered donor-acceptor interfaces. Hybrid nanowires in suspensions spontaneously undergo phase transitions from isotropic to nematic liquid crystalline phases via a biphasic region with increasing concentration. The unique liquid crystalline elasticity of nanohybrids results in large-area monodomain structures of aligned hybrid nanowires under simple shear flow, which are maintained in the dried film used for device fabrication. These methodologies provide a mechanism for controlling donor-acceptor interfaces and exploiting lyotropic liquid crystallinity for solution-based processing of large-area alignment of photovoltaic elements with anisotropic charge transport for hybrid photovoltaic devices.
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Affiliation(s)
- Ryan Cox
- Department of Chemistry and Biochemistry, California Polytechnic State University , San Luis Obispo, California 93407, United States
| | - Grant T Olson
- Department of Chemistry and Biochemistry, California Polytechnic State University , San Luis Obispo, California 93407, United States
| | - Michaela Pfau
- Department of Chemistry and Biochemistry, California Polytechnic State University , San Luis Obispo, California 93407, United States
| | - Nima Eshaghi
- Department of Chemistry and Biochemistry, California Polytechnic State University , San Luis Obispo, California 93407, United States
| | - Kyle Barcus
- Department of Chemistry and Biochemistry, California Polytechnic State University , San Luis Obispo, California 93407, United States
| | - Dania Ramirez
- Department of Chemistry and Biochemistry, California Polytechnic State University , San Luis Obispo, California 93407, United States
| | - Raymond Fernando
- Department of Chemistry and Biochemistry, California Polytechnic State University , San Luis Obispo, California 93407, United States
| | - Shanju Zhang
- Department of Chemistry and Biochemistry, California Polytechnic State University , San Luis Obispo, California 93407, United States
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Gao F, Aminane S, Bai S, Teplyakov AV. Chemical Protection of Material Morphology: Robust and Gentle Gas-Phase Surface Functionalization of ZnO with Propiolic Acid. CHEMISTRY OF MATERIALS : A PUBLICATION OF THE AMERICAN CHEMICAL SOCIETY 2017; 29:4063-4071. [PMID: 29151674 PMCID: PMC5690571 DOI: 10.1021/acs.chemmater.7b00747] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Chemical functionalization of ZnO surface with an alkyne functional group was successfully achieved by exposing ZnO nanopowder to gas-phase propiolic acid in vacuum, which left the alkyne group available for subsequent chemical modification via the azide-alkyne cycloaddition "click" reaction with benzyl azide. The highly selective formation of a bidentate carboxylate linkage and the reaction of benzyl azide were confirmed by solid-state nuclear magnetic resonance spectroscopy, Fourier-transform infrared spectroscopy, and X-ray photoelectron spectroscopy. Most importantly, scanning electron microscopy revealed that the surface morphology was perfectly preserved by this gas-phase modification, as opposed to the alternative protocols based on liquid phase processing. This simple and precise design can serve as a universal method for the modular functionalization of zinc oxide surface following the initial surface preparation and be further applied to thin films, nanostructures, and powders, where preserving surface morphology during chemical modification is especially important.
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Affiliation(s)
- Fei Gao
- Department of Chemistry and Biochemistry, University of Delaware, Newark, Delaware 19716, United States
| | - Soraya Aminane
- Université Pierre et Marie Curie, Paris Cedex 05 75005, France
| | - Shi Bai
- Department of Chemistry and Biochemistry, University of Delaware, Newark, Delaware 19716, United States
| | - Andrew V. Teplyakov
- Department of Chemistry and Biochemistry, University of Delaware, Newark, Delaware 19716, United States
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20
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George L, Kunhikannan AK, Illathvalappil R, Ottoor D, Kurungot S, Devi RN. Understanding the electron transfer process in ZnO-naphthol azobenzoic acid composites from photophysical characterisation. Phys Chem Chem Phys 2016; 18:22179-87. [PMID: 27443499 DOI: 10.1039/c6cp02908f] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Semiconductor nanoparticles surface modified with organic molecules capable of visible light absorption and effectively transferring the electrons to the catalytic sites have the potential to be good photocatalysts. ZnO nanoparticles of size ∼3 nm are grafted with two azonaphthols, one conjugated and the other non-conjugated. The photophysical properties of modified ZnO indicate an effective electron transfer from the conjugated azonaphthol to ZnO but not in the case of the non-conjugated molecule. It is also observed from lifetime studies that the conjugated molecule stabilises the defect sites on ZnO nanoparticles. It is possible that excited electrons from the conjugated molecule are transferred to specific defect sites in ZnO. This apparently does not occur in the non-conjugated molecule, bringing to focus the importance of the photophysical characteristics of organic modifiers in designing visible light active photocatalysts.
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Affiliation(s)
- Leena George
- Catalysis and Inorganic Chemistry Division, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pune - 411008, India. and Academy of Scientific and Innovative Research (AcSIR), New Delhi, India
| | - Athira K Kunhikannan
- Catalysis and Inorganic Chemistry Division, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pune - 411008, India.
| | - Rajith Illathvalappil
- Academy of Scientific and Innovative Research (AcSIR), New Delhi, India and Physical and Materials Chemistry Division, CSIR-National Chemical Laboratory, Pune, India
| | - Divya Ottoor
- Department of Chemistry, Savitribai Phule Pune University, Ganeshkhind Road, Pune 411007, India
| | - Sreekumar Kurungot
- Academy of Scientific and Innovative Research (AcSIR), New Delhi, India and Physical and Materials Chemistry Division, CSIR-National Chemical Laboratory, Pune, India
| | - R Nandini Devi
- Catalysis and Inorganic Chemistry Division, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pune - 411008, India. and Academy of Scientific and Innovative Research (AcSIR), New Delhi, India
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21
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Khan A, Zada A, Humayun M. Physicochemical Interaction of ZnO Fine Particles with 5-Mono-(4-carboxyphenyl)-10,15,20-Triphenylporphyrin. J CHIN CHEM SOC-TAIP 2015. [DOI: 10.1002/jccs.201400190] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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22
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Khairy M, Mohamed MM. SnO₂(β-Bi₂O₃)/Bi₂Sn₂O₇ nanohybrids doped with Pt and Pd nanoparticles: applications in visible light photocatalysis, electrical conductivity and dye-sensitized solar cells. Phys Chem Chem Phys 2015; 17:21716-28. [PMID: 26234250 DOI: 10.1039/c5cp02066b] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Bi2O3-SnO2 nanocomposites formed at a nominal molar ratio of 3 : 1 and loaded with Pd/Pt nanoparticles synthesized by a sol gel-hydrothermal method with the aid of a template were thoroughly characterized by X-ray diffraction, TEM-EDX, N2 sorptiometry, diffuse reflectance UV-Vis, FTIR, photoluminescence and electrical conductivity. It has been shown that Pd and Pt stimulate the existence of β-Bi2O3 and SnO2, respectively together with the key component Bi2Sn2O7. The photocatalytic results indicate that Pd/β-Bi2O3-Bi2Sn2O7 revealed a remarkable performance for the degradation of methylene blue (MB) dye as compared to the Pt/SnO2-Bi2Sn2O7 and Bi2O3-SnO2 samples in both the UV and visible regions. The enhanced photocatalytic activity of the Pd/β-Bi2O3-Bi2Sn2O7 nanocomposite is primarily attributed to the broad contact between the β-Bi2O3 and Bi2Sn2O7 phases, which indicates high mesoporosity and heterojunction structures resulting in separation efficacy between photo-induced electron-hole pairs. Specifically, the photosensitive β-Bi2O3 is easily excited and released electrons to be accepted by Bi2Sn2O7 and Pd that might be deposited in the interlayer between β-Bi2O3 and Bi2Sn2O7. The degradation mechanism of MB over Pd/β-Bi2O3-Bi2Sn2O7 in the visible region showed that the dye degradation proceeds through evolution of ˙O2(-) and ˙OH radicals as evaluated using photoluminescence and free radical trapping experiments. An insight into the electrical properties including the dielectric constant and impedance of the materials indicates that Pd/β-Bi2O3-Bi2Sn2O7 has the highest conductivity based on increasing the ionic transport and defects at the β-Bi2O3/Bi2Sn2O7 heterojunction. This material displayed an improved photocurrent response of a higher power conversion efficiency, exceeding that of Pt/SnO2-Bi2Sn2O7 and SnBi3 by 50% and 250%, respectively, in dye-sensitized solar cells. Picosecond-resolved photoluminescence (PL) and polarization gated PL anisotropy measurements were combined to clarify the process of FRET from the excited Pd/β-Bi2O3-Bi2Sn2O7 to SD N719. This indicates that the latter structure can be proposed as a multifunctional candidate for use in dye-sensitized solar cells, as an electrical material and as an efficient photocatalyst based on its versatile structure.
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Affiliation(s)
- M Khairy
- Chemistry Department, Faculty of Science, Benha University, Benha, Egypt.
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23
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Bobe MSR, Al Kobaisi M, Bhosale SV, Bhosale SV. Solvent-Tuned Self-Assembled Nanostructures of Chiral l/d-Phenylalanine Derivatives of Protoporphyrin IX. ChemistryOpen 2015; 4:516-22. [PMID: 26478848 PMCID: PMC4603414 DOI: 10.1002/open.201500011] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2015] [Indexed: 12/19/2022] Open
Abstract
Protoporphyrin IX is a naturally occurring amphiphilic porphyrin with a rigid hydrophobic nonpolar core and two polar propionic acid substitutions on the porphyrin ring. This molecule can be modified on the hydrophilic group, which can lead to strengthened π-π-stacking and spontaneous self-assembly into novel nanostructures. Herein, we use l- phenylalanine and d-phenylalanine to modify protoporphyrin IX, and use the two derivatives for solvophobic-controlled self-assembly. Both derivatives possess two important features: 1) the aromatic core of the porphyrin for dispersive interactions and 2) a chiral amino acid to maximize the influence of chirality on selfassembly. These derivatives lead to the formation of a variety of nanostructure morphologies, such as spheres, nanofibers, lamellar structures, and thread-like and spherical shells. Solution-based self-assembly was determined by UV/Vis, fluorescence, and circular dichroism spectroscopy, and the formed nanostructures were characterized by scanning electron microscopy (SEM). Such engineered porphyrin derivatives could have potential applications in energy transport and storage, supramolecular chemistry, materials science, and medicine.
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Affiliation(s)
- Mr Sharad R Bobe
- Polymers and Functional Material Division, CSIR-Indian Institute of Chemical TechnologyHyderabad, Telangana, 500 007, India
- Department of Organic Chemistry, School of Chemical Sciences, North Maharashtra UniversityJalgaon, M.S., 425 001, India
| | - Mohammad Al Kobaisi
- School of Applied Sciences, RMIT UniversityGPO Box 2476, Melbourne, VIC, 3001, Australia
| | - Sheshanath V Bhosale
- School of Applied Sciences, RMIT UniversityGPO Box 2476, Melbourne, VIC, 3001, Australia
| | - Sidhanath V Bhosale
- Polymers and Functional Material Division, CSIR-Indian Institute of Chemical TechnologyHyderabad, Telangana, 500 007, India
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24
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Hong H, Wang F, Zhang Y, Graves SA, Eddine SBZ, Yang Y, Theuer CP, Nickles RJ, Wang X, Cai W. Red fluorescent zinc oxide nanoparticle: a novel platform for cancer targeting. ACS APPLIED MATERIALS & INTERFACES 2015; 7:3373-81. [PMID: 25607242 PMCID: PMC4326560 DOI: 10.1021/am508440j] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Multifunctional zinc oxide (ZnO) nanoparticles (NPs) with well-integrated multimodality imaging capacities have generated increasing research interest in the past decade. However, limited progress has been made in developing ZnO NP-based multimodality tumor-imaging agents. Here we developed novel red fluorescent ZnO NPs and described the successful conjugation of 64Cu (t1/2=12.7 h) and TRC105, a chimeric monoclonal antibody against CD105, to these ZnO NPs via well-developed surface engineering procedures. The produced dual-modality ZnO NPs were readily applicable for positron emission tomography (PET) imaging and fluorescence imaging of the tumor vasculature. Their pharmacokinetics and tumor-targeting efficacy/specificity in mice bearing murine breast 4T1 tumor were thoroughly investigated. ZnO NPs with dual-modality imaging properties can serve as an attractive candidate for future cancer theranostics.
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Affiliation(s)
- Hao Hong
- Department of Radiology, University of Wisconsin - Madison, Wisconsin 53705-2275, United States
| | - Fei Wang
- Department of Materials Science and Engineering, University of Wisconsin - Madison, Wisconsin 53705-2275, United States
| | - Yin Zhang
- Department of Medical Physics, University of Wisconsin - Madison, Wisconsin 53705-2275, United States
| | - Stephen A. Graves
- Department of Medical Physics, University of Wisconsin - Madison, Wisconsin 53705-2275, United States
| | - Savo Bou Zein Eddine
- Department of Radiology, University of Wisconsin - Madison, Wisconsin 53705-2275, United States
- Faculty of Medicine and Medical Center, American University of Beirut, Beirut 11072020, Lebanon
| | - Yunan Yang
- Department of Radiology, University of Wisconsin - Madison, Wisconsin 53705-2275, United States
| | | | - Robert J. Nickles
- Department of Medical Physics, University of Wisconsin - Madison, Wisconsin 53705-2275, United States
| | - Xudong Wang
- Department of Materials Science and Engineering, University of Wisconsin - Madison, Wisconsin 53705-2275, United States
| | - Weibo Cai
- Department of Radiology, University of Wisconsin - Madison, Wisconsin 53705-2275, United States
- Department of Medical Physics, University of Wisconsin - Madison, Wisconsin 53705-2275, United States
- University of Wisconsin Carbone Cancer Center, Madison, Wisconsin 53705-2275, United States
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25
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Boissezon R, Muller J, Beaugeard V, Monge S, Robin JJ. Organophosphonates as anchoring agents onto metal oxide-based materials: synthesis and applications. RSC Adv 2014. [DOI: 10.1039/c4ra05414h] [Citation(s) in RCA: 65] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
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26
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Klaumünzer M, Kahnt A, Burger A, Mačković M, Münzel C, Srikantharajah R, Spiecker E, Hirsch A, Peukert W, Guldi DM. Surface functionalization and electronic interactions of ZnO nanorods with a porphyrin derivative. ACS APPLIED MATERIALS & INTERFACES 2014; 6:6724-6730. [PMID: 24665864 DOI: 10.1021/am5004552] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
To optimize electron transfer and optoelectronic properties in nanoparticulate thin films for electronics we show the surface functionalization of ZnO nanorods by means of replacing surface active 2-[2-(2-methoxyethoxy)ethoxy]acetic acid (TODA) by a redoxactive organic component, that is, 5,10,15,20-(phenoxyacetat)-porphyrin bearing four carboxylic acids as possible ZnO anchors. Microscopy-transmission electron microscopy-and spectroscopy-optical spectroscopy-verifies the successful and homogenous integration of the porphyrin onto the surface of ZnO nanorods, a process that is facilitated by the four anchoring groups. Photophysical investigations based on emission and absorption spectroscopy prompt to distinct electronic interactions between ZnO nanorods and the porphyrins. Consequently, we performed further photophysical studies flanked by pulse radiolysis assays to corroborate the nature of the electronic interactions.
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Affiliation(s)
- Martin Klaumünzer
- Institute of Particle Technology, Friedrich-Alexander-University Erlangen-Nuremberg , Cauerstrasse 4, 91058 Erlangen, Germany
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27
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Fanelli F, Mastrangelo AM, Fracassi F. Aerosol-assisted atmospheric cold plasma deposition and characterization of superhydrophobic organic-inorganic nanocomposite thin films. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:857-865. [PMID: 24393041 DOI: 10.1021/la404755n] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
A facile atmospheric pressure cold plasma process is presented to deposit a novel organic-inorganic hydrocarbon polymer/ZnO nanoparticles nanocomposite coating. Specifically, this method involves the utilization of an atmospheric pressure dielectric barrier discharge (DBD) fed with helium and the aerosol of a dispersion of oleate-capped ZnO nanoparticles (NPs) in n-octane. As assessed by X-ray photoelectron spectroscopy (XPS) and attenuated total reflectance-Fourier transform infrared (ATR-FTIR) spectroscopy, the deposited nanocomposite coating combines the chemical features of both the oleate-capped ZnO NPs and the polyethylene-like organic component originated from the plasma polymerization of n-octane. Additionally, scanning electron microscopy (SEM) and transmission scanning electron microscopy (TSEM) confirm the synthesis of hierarchical micro/nanostructured coatings containing quasi-spherical NPs agglomerates. The polyethylene-like polymer covers the NPs agglomerates to different extents and contributes to their immobilization in the three-dimensional network of the coating. The increase of both the deposition time (1-10 min) and the NPs concentration in the dispersion (0.5-5 wt %) has a significant effect on the chemical and morphological structure of the thin films and, in fact, results in the increase the ZnO NPs content, which ultimately leads to superhydrophobic surfaces (advancing and receding water contact angles higher than 160°) with low hysteresis due to the hierarchical multiscale roughness of the coating.
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Affiliation(s)
- Fiorenza Fanelli
- Institute of Inorganic Methodologies and Plasmas, National Research Council (IMIP-CNR), c/o Department of Chemistry, University of Bari Aldo Moro , via Orabona 4, 70126 Bari, Italy
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28
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Klaumünzer M, Distaso M, Hübner J, Mačković M, Spiecker E, Kryschi C, Peukert W. ZnO superstructures via oriented aggregation initiated in a block copolymer melt. CrystEngComm 2014. [DOI: 10.1039/c3ce41868e] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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29
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Redeker ND, Danesh CD, Ding Y, Zhang S. Anisotropic core–shell nanocomposites by direct covalent attachment of a side-functionalized poly(3-hexylthiophene) onto ZnO nanowires. POLYMER 2013. [DOI: 10.1016/j.polymer.2013.11.016] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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30
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Bhosale SV, Bhosale SV, Shitre GV, Bobe SR, Gupta A. Supramolecular Chemistry of Protoporphyrin IX and Its Derivatives. European J Org Chem 2013. [DOI: 10.1002/ejoc.201300240] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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31
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Saha S, Sarkar S, Pal S, Sarkar P. Ligand mediated tuning of the electronic energy levels of ZnO nanoparticles. RSC Adv 2013. [DOI: 10.1039/c2ra22429a] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
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Qurashi A, Rather JA, De Wael K, Merzougui B, Tabet N, Faiz M. Rapid microwave synthesis of high aspect-ratio ZnO nanotetrapods for swift bisphenol A detection. Analyst 2013; 138:4764-8. [DOI: 10.1039/c3an00336a] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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Sarkar S, Makhal A, Bora T, Lakhsman K, Singha A, Dutta J, Pal SK. Hematoporphyrin-ZnO nanohybrids: twin applications in efficient visible-light photocatalysis and dye-sensitized solar cells. ACS APPLIED MATERIALS & INTERFACES 2012. [PMID: 23186038 DOI: 10.1021/am302288m] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
Light-harvesting nanohybrids (LHNs) are systems composed of an inorganic nanostructure associated with an organic pigment that have been exploited to improve the light-harvesting performance over individual components. The present study is focused on developing a potential LHN, attained by the functionalization of dense arrays of ZnO nanorods (NRs) with a biologically important organic pigment hematoporphyrin (HP), which is an integral part of red blood cells (hemoglobin). Application of spectroscopic techniques, namely, Fourier transform infrared spectroscopy (FTIR) and Raman scattering, confirm successful monodentate binding of HP carboxylic groups to Zn(2+) located at the surface of ZnO NRs. Picosecond-resolved fluorescence studies on the resulting HP-ZnO nanohybrid show efficient electron migration from photoexcited HP to the host ZnO NRs. This essential photoinduced event activates the LHN under sunlight, which ultimately leads to the realization of visible-light photocatalysis (VLP) of a model contaminant Methylene Blue (MB) in aqueous solution. A control experiment in an inert gas atmosphere clearly reveals that the photocatalytic activity is influenced by the formation of reactive oxygen species (ROS) in the media. Furthermore, the stable LHNs prepared by optimized dye loading have also been used as an active layer in dye-sensitized solar cells (DSSCs). We believe these promising LHNs to find their dual applications in organic electronics and for the treatment of contaminant wastewater.
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Affiliation(s)
- Soumik Sarkar
- Department of Chemical, Biological and Macromolecular Sciences, S. N. Bose National Centre for Basic Sciences, Block JD, Sector III, Salt Lake, Kolkata 700 098, India
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Co-grafting of porphyrins and fullerenes on ZnO nanorods: Towards supramolecular donor–acceptor assembly. J Colloid Interface Sci 2012; 386:268-76. [DOI: 10.1016/j.jcis.2012.06.037] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2012] [Revised: 06/15/2012] [Accepted: 06/17/2012] [Indexed: 11/19/2022]
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Clementi C, Rosi F, Romani A, Vivani R, Brunetti BG, Miliani C. Photoluminescence properties of zinc oxide in paints: a study of the effect of self-absorption and passivation. APPLIED SPECTROSCOPY 2012; 66:1233-1241. [PMID: 23031708 DOI: 10.1366/12-06643] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Zinc oxide has been widely used as a white artist pigment since the end of the eighteenth century. The luminescence properties of this compound have received great interest during the last decades for promising applications in different fields of material science, but their diagnostic implications in the cultural-heritage context have been poorly exploited. This paper is intended to provide a clear picture of the luminescence behavior of zinc white in oil paintings. With this aim, three white pigments and three highly pure (analytical grade) zinc oxides were studied as powder substrates and as painting models by ultraviolet-visible (UV-VIS) fluorescence and Fourier transform infrared (FT-IR) spectroscopy. The quenching of the luminescence intensity of the UV excitonic emission due to self-absorption and multiple scattering phenomena has been investigated, pointing out the possible difficulty of detecting this signal with negative consequences in the diagnostics of works of art. By contrast, the UV emission is notably enhanced by interaction with the binder, whereas the visible emission decreases. This phenomenon is probably due to the formation of covalent bonds between zinc atoms and carboxylates from the lipidic medium that are chemisorbed on zinc oxide surfaces.
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Affiliation(s)
- Catia Clementi
- Department of Chemistry, University of Perugia, via Elce di Sotto 8, 06123 Perugia, Italy
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Chen J, Ruther RE, Tan Y, Bishop LM, Hamers RJ. Molecular adsorption on ZnO(1010) single-crystal surfaces: morphology and charge transfer. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:10437-10445. [PMID: 22680252 DOI: 10.1021/la301347t] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
While ZnO has excellent electrical properties, it has not been widely used for dye-sensitized solar cells, in part because ZnO is chemically less stable than widely used TiO(2). The functional groups typically used for surface passivation and for attaching dye molecules either bind weakly or etch the ZnO surface. We have compared the formation of molecular layers from alkane molecules with terminal carboxylic acid, alcohol, amine, phosphonic acid, or thiol functional groups on single-crystal zinc oxide (1010) surfaces. Atomic force microscopy (AFM) images show that alkyl carboxylic acids etch the surface whereas alkyl amine and alkyl alcohols bind only weakly on the ZnO(1010) surface. Phosphonic acid-terminated molecules were found to bind to the surface in a heterogeneous manner, forming clusters of molecules. Alkanethiols were found to bind to the surface, forming highly uniform monolayers with some etching detected after long immersion times in an alkanethiol solution. Monolayers of hexadecylphosphonic acid and octadecanethiol were further analyzed by Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), and electrochemical measurements. AFM scratching shows that thiols were bound strongly to the ZnO surface, suggesting the formation of strong Zn-S covalent bonds. Surprisingly, the tridentate phosphonic acids adhered much more weakly than the monodentate thiol. The influence of organic grafting on the charge transfer to ZnO was studied by time-resolved surface photovoltage measurements and electrochemical impedance measurements. Our results show that the grafting of thiols to ZnO leads to robust surfaces and reduces the surface band bending due to midgap surface states.
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Affiliation(s)
- Jixin Chen
- Department of Chemistry, University of Wisconsin-Madison, 1101 University Avenue, Madison, Wisconsin 53706, United States
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Sinkovits DW, Luijten E. Nanoparticle-controlled aggregation of colloidal tetrapods. NANO LETTERS 2012; 12:1743-1748. [PMID: 21539342 DOI: 10.1021/nl200961z] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Tetrapods are among the most promising building blocks for nanoscale self-assembly, offering various desirable features. Whereas these particles can be fabricated with remarkable precision, comparatively less is known about their aggregation behavior. Employing a novel, powerful simulation method, we demonstrate that charged nanoparticles offer considerable control over the assembly of tip-functionalized tetrapods. Extending these findings to tetrapods confined to a gas/liquid interface, we show that regular structures can be achieved even without functionalization.
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Affiliation(s)
- Daniel W Sinkovits
- Department of Physics, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA
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Bishop LM, Yeager JC, Chen X, Wheeler JN, Torelli MD, Benson MC, Burke SD, Pedersen JA, Hamers RJ. A citric acid-derived ligand for modular functionalization of metal oxide surfaces via "click" chemistry. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:1322-1329. [PMID: 22145802 DOI: 10.1021/la204145t] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Citric acid is a widely used surface-modifying ligand for growth and processing of a variety of nanoparticles; however, the inability to easily prepare derivatives of this molecule has restricted the development of versatile chemistries for nanoparticle surface functionalization. Here, we report the design and synthesis of a citric acid derivative bearing an alkyne group and demonstrate that this molecule provides the ability to achieve stable, multidentate carboxylate binding to metal oxide nanoparticles, while also enabling subsequent multistep chemistry via the Cu(I)-catalyzed azide-alkyne cycloaddition (CuAAC) reaction. The broad utility of this strategy for the modular functionalization of metal oxide surfaces was demonstrated by its application in the CuAAC modification of ZnO, Fe(2)O(3), TiO(2), and WO(3) nanoparticles.
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Affiliation(s)
- Lee M Bishop
- Department of Chemistry, University of Wisconsin-Madison, 1101 University Avenue, Madison, Wisconsin 53706, USA
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Hong H, Shi J, Yang Y, Zhang Y, Engle JW, Nickles RJ, Wang X, Cai W. Cancer-targeted optical imaging with fluorescent zinc oxide nanowires. NANO LETTERS 2011; 11:3744-50. [PMID: 21823599 PMCID: PMC3173586 DOI: 10.1021/nl201782m] [Citation(s) in RCA: 98] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
Abstract
Herein we demonstrate that intrinsically fluorescent zinc oxide (ZnO) nanowires (NWs) can be adopted for molecularly targeted imaging of cancer cells, after they are functionalized to render water solubility, biocompatibility, and low cellular toxicity. Optical imaging of integrin α(v)β(3) on U87MG human glioblastoma cells was achieved with RGD peptide-conjugated green fluorescent ZnO NWs, which opened up new avenues of research for investigating ZnO NW-based agents in tumor vasculature-targeted molecular imaging and drug delivery.
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Affiliation(s)
- Hao Hong
- Department of Radiology and Medical Physics, University of Wisconsin-Madison, Madison, Wisconsin 53705, United States
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Ruther RE, Franking R, Huhn AM, Gomez-Zayas J, Hamers RJ. Formation of smooth, conformal molecular layers on ZnO surfaces via photochemical grafting. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2011; 27:10604-10614. [PMID: 21777005 DOI: 10.1021/la2011265] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
We have investigated the photochemical grafting of organic alkenes to atomically flat ZnO(10 ̅10) single crystals and ZnO nanorods as a way to produce functional molecule-semiconductor interfaces. Atomic force microscopy shows that photochemical grafting produces highly conformal, smooth molecular layers with no detectable changes in the underlying structure of the ZnO terraces or steps. X-ray photoelectron spectroscopy measurements show that grafting of a methyl ester-terminated alkene terminates near one monolayer, while alkenes bearing a trifluoroacetamide-protected amine form very smooth multilayers. Even with multilayers, it is possible to deprotect the amines and to link a second molecule to the surface with excellent efficiency and without significant loss of molecules from the surface. This demonstrates that the use of photochemical grafting, even in the case of multilayer formation, enables multistep chemical processes to be conducted on the ZnO surface. Photoresponse measurements demonstrate that functionalization of the surface does not affect the ability to induce field effects in the underlying ZnO, thereby suggesting that this approach to functionalization may be useful for applications in sensing and in hybrid organic-inorganic transistors and related devices.
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Affiliation(s)
- Rose E Ruther
- Department of Chemistry, University of Wisconsin-Madison, 1101 University Ave, Madison, Wisconsin 53706, USA
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Shi J, Hong H, Ding Y, Yang Y, Cai W, Wang X. Evolution of Zinc Oxide Nanostructures through Kinetics Control. ACTA ACUST UNITED AC 2011; 21:9000-9008. [PMID: 21743779 DOI: 10.1039/c1jm10918a] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In-depth understanding of the kinetics of the vapor deposition process is substantial for advancing this capable bottom-up nanostructure synthesis approach into a versatile large-scale nanomanufacturing technology. In this paper, we report a systematic study of the vapor deposition kinetics of ZnO nanomaterials under controlled atmosphere and properly refined deposition conditions. The experiments clearly evidenced the self-catalyzed growth of ZnO NWs via the formation of ZnO nanoflowers. This result illustrated how ZnO morphologies were associated with the discrepancy between oxidation rate and condensation rate of Zn. The capability of switching the NW morphologies and possibly mechanisms was demonstrated by kinetically controlling the deposition system. The high Zn composition during the deposition resulted in strongly luminescent NWs, which can be used for optical imaging applications. This research discovered a fundamental kinetics that governs the mechanisms and morphology selection of nanostructures in a non-catalyst growth system.
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Affiliation(s)
- Jian Shi
- Department of Materials Science and Engineering, University of Wisconsin-Madison
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Luminescence of tetraphenylporphyrin by an energy transfer from photoexcited ZnO nanoparticle. Chem Phys Lett 2011. [DOI: 10.1016/j.cplett.2010.11.020] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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A novel strategy to prepare ZnO/PbS heterostructured functional nanocomposite utilizing the surface adsorption property of ZnO nanosheets. Catal Today 2010. [DOI: 10.1016/j.cattod.2010.07.013] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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