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Thakur N, Thakur N, Kumar A, Thakur VK, Kalia S, Arya V, Kumar A, Kumar S, Kyzas GZ. A critical review on the recent trends of photocatalytic, antibacterial, antioxidant and nanohybrid applications of anatase and rutile TiO2 nanoparticles. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 914:169815. [PMID: 38184262 DOI: 10.1016/j.scitotenv.2023.169815] [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: 11/03/2023] [Revised: 12/22/2023] [Accepted: 12/29/2023] [Indexed: 01/08/2024]
Abstract
Titanium dioxide nanoparticles (TiO2 NPs) have become a focal point of research due to their widespread daily use and diverse synthesis methods, including physical, chemical, and environmentally sustainable approaches. These nanoparticles possess unique attributes such as size, shape, and surface functionality, making them particularly intriguing for applications in the biomedical field. The continuous exploration of TiO2 NPs is driven by the quest to enhance their multifunctionality, aiming to create next-generation products with superior performance. Recent research efforts have specifically focused on understanding the anatase and rutile phases of TiO2 NPs and evaluating their potential in various domains, including photocatalytic processes, antibacterial properties, antioxidant effects, and nanohybrid applications. The hypothesis guiding this research is that by exploring different synthesis methods, particularly chemical and environmentally friendly approaches, and incorporating doping and co-doping techniques, the properties of TiO2 NPs can be significantly improved for diverse applications. The study employs a comprehensive approach, investigating the effects of nanoparticle size, shape, dose, and exposure time on performance. The synthesis methods considered encompass both conventional chemical processes and environmentally friendly alternatives, with a focus on how doping and co-doping can enhance the properties of TiO2 NPs. The research unveils valuable insights into the distinct phases of TiO2 NPs and their potential across various applications. It sheds light on the improved properties achieved through doping and co-doping, showcasing advancements in photocatalytic processes, antibacterial efficacy, antioxidant capabilities, and nanohybrid applications. The study concludes by emphasizing regulatory aspects and offering suggestions for product enhancement. It provides recommendations for the reliable application of TiO2 NPs, addressing a comprehensive spectrum of critical aspects in TiO2 NP research and application. Overall, this research contributes to the evolving landscape of TiO2 NP utilization, offering valuable insights for the development of innovative and high-performance products.
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Affiliation(s)
- Naveen Thakur
- Department of Physics, Career Point University, Hamirpur, Himachal Pradesh 176041, India.
| | - Nikesh Thakur
- Department of Physics, Career Point University, Hamirpur, Himachal Pradesh 176041, India
| | - Anil Kumar
- School of chemical and metallurgical engineering, University of the Witwatersrand, Johannesburg, South Africa
| | - Vijay Kumar Thakur
- Biorefining and Advanced Materials Research Center, SRUC, Kings Buildings West Mains Road, Edinburgh EH9 3JG, United Kingdom
| | - Susheel Kalia
- Department of Chemistry, ACC Wing (Academic Block) Indian Military Academy, Dehradun, Uttarakhand 248007, India
| | - Vedpriya Arya
- Patanjali Herbal Research Department, Patanjali Research Institute, Haridwar, Uttarakhand 249405, India
| | - Ashwani Kumar
- Patanjali Herbal Research Department, Patanjali Research Institute, Haridwar, Uttarakhand 249405, India
| | - Sunil Kumar
- Department of Animal Sciences, Central University of Himachal Pradesh, Kangra, Shahpur, Himachal Pradesh 176206, India
| | - George Z Kyzas
- Hephaestus Laboratory, Department of Chemistry, School of Science, International Hellenic University, Kavala, Greece.
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2
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Antolini F. Direct Optical Patterning of Quantum Dots: One Strategy, Different Chemical Processes. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:2008. [PMID: 37446523 DOI: 10.3390/nano13132008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/09/2023] [Revised: 06/30/2023] [Accepted: 07/03/2023] [Indexed: 07/15/2023]
Abstract
Patterning, stability, and dispersion of the semiconductor quantum dots (scQDs) are three issues strictly interconnected for successful device manufacturing. Recently, several authors adopted direct optical patterning (DOP) as a step forward in photolithography to position the scQDs in a selected area. However, the chemistry behind the stability, dispersion, and patterning has to be carefully integrated to obtain a functional commercial device. This review describes different chemical strategies suitable to stabilize the scQDs both at a single level and as an ensemble. Special attention is paid to those strategies compatible with direct optical patterning (DOP). With the same purpose, the scQDs' dispersion in a matrix was described in terms of the scQD surface ligands' interactions with the matrix itself. The chemical processes behind the DOP are illustrated and discussed for five different approaches, all together considering stability, dispersion, and the patterning itself of the scQDs.
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Affiliation(s)
- Francesco Antolini
- Fusion and Technologies for Nuclear Safety and Security Department, Physical Technology for Safety and Health Division, ENEA C.R. Frascati, Via E. Fermi 45, 00044 Frascati, Italy
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3
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Nikolova MP, Joshi PB, Chavali MS. Updates on Biogenic Metallic and Metal Oxide Nanoparticles: Therapy, Drug Delivery and Cytotoxicity. Pharmaceutics 2023; 15:1650. [PMID: 37376098 PMCID: PMC10301310 DOI: 10.3390/pharmaceutics15061650] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2023] [Revised: 05/20/2023] [Accepted: 05/30/2023] [Indexed: 06/29/2023] Open
Abstract
The ambition to combat the issues affecting the environment and human health triggers the development of biosynthesis that incorporates the production of natural compounds by living organisms via eco-friendly nano assembly. Biosynthesized nanoparticles (NPs) have various pharmaceutical applications, such as tumoricidal, anti-inflammatory, antimicrobials, antiviral, etc. When combined, bio-nanotechnology and drug delivery give rise to the development of various pharmaceutics with site-specific biomedical applications. In this review, we have attempted to summarize in brief the types of renewable biological systems used for the biosynthesis of metallic and metal oxide NPs and the vital contribution of biogenic NPs as pharmaceutics and drug carriers simultaneously. The biosystem used for nano assembly further affects the morphology, size, shape, and structure of the produced nanomaterial. The toxicity of the biogenic NPs, because of their pharmacokinetic behavior in vitro and in vivo, is also discussed, together with some recent achievements towards enhanced biocompatibility, bioavailability, and reduced side effects. Because of the large biodiversity, the potential biomedical application of metal NPs produced via natural extracts in biogenic nanomedicine is yet to be explored.
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Affiliation(s)
- Maria P. Nikolova
- Department of Material Science and Technology, University of Ruse “A. Kanchev”, 8 Studentska Str., 7017 Ruse, Bulgaria
| | - Payal B. Joshi
- Shefali Research Laboratories, 203/454, Sai Section, Ambernath (East), Mumbai 421501, Maharashtra, India;
| | - Murthy S. Chavali
- Office of the Dean (Research), Dr. Vishwanath Karad MIT World Peace University (MIT-WPU), Kothrud, Pune 411038, Maharashtra, India;
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4
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Antolini F, Limosani F, Carcione R. Direct Laser Patterning of CdTe QDs and Their Optical Properties Control through Laser Parameters. NANOMATERIALS (BASEL, SWITZERLAND) 2022; 12:1551. [PMID: 35564260 PMCID: PMC9103134 DOI: 10.3390/nano12091551] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/29/2022] [Revised: 04/27/2022] [Accepted: 04/29/2022] [Indexed: 11/18/2022]
Abstract
Direct laser patterning is a potential and powerful technique to localize nanomaterials within a host matrix. The main goal of this study is to demonstrate that by tuning some parameters of a laser source, like power and laser pulse frequency, it is possible to modify and tune the optical properties of the generated quantum dots (QDs) within a host matrix of a specific chemical composition. The study is realized by using cadmium telluride (CdTe) QD precursors, embedded in polymethylmethacrylate (PMMA) host matrix, as starting materials. The patterning of the CdTe QDs is carried out by using a UV nanosecond laser source at 355. Fluorescence microscopy and photoluminescence spectroscopy, associated with transmission electron microscopy, indicate that it is possible to obtain desired patterns of QDs emitting from green to red of the visible spectrum, due to the formed CdTe QDs. Preliminary highlights of the CdTe QDs' formation mechanism are given in terms of laser power and laser pulse frequency (repetition rate).
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Affiliation(s)
- Francesco Antolini
- Fusion and Technologies for Nuclear Safety and Security Department, Physical Technologies for Safety and Health Division, Photonics Micro and Nanostructures Laboratory, ENEA C.R. Frascati, via Enrico Fermi 45, 00044 Frascati (RM), Italy
| | - Francesca Limosani
- Department of Information Engineering, Polytechnic University of Marche, Via Brecce Bianche, 1, 60131 Ancona, Italy;
- INFN-National Laboratories of Frascati, Via Enrico Fermi, 54, 00044 Frascati, Italy
| | - Rocco Carcione
- Consiglio Nazionale delle Ricerche, Institute of Materials for Electronics and Magnetism (CNR-IMEM), Parco Area delle Scienze 37A, 43124 Parma, Italy;
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5
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Anticancer properties of nanoparticle synthesized from Cyphostemma auriculatum. Roxb on nude mice. Int J Health Sci (Qassim) 2022. [DOI: 10.53730/ijhs.v6ns4.6232] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
The present study was aimed to establish the pharmacological and therapeutic properties of a green synthesized silver nanoparticles (AgNPs) in breast cancer induced by 7,12-dimethylbenzanthracene (DMBA) in nude mice. In this study, AgNPs made from Cyphostemma auriculatum Roxb. leaf extract( CA-AgNPs) were tested in a nude mice model for anticancer activity. A significant elevate changes in blood chemistry like heamoglobin, RBC, WBC, platelets and also on blood biochemical parameters such as catalase and SOD with obtained after 28 days of treatment with carcinogen. However, these levels were restored to normal at the end of the study period treated with CA-AgNPs. The liver oxidative stress enzymes showed no significant alterations. With 15 and 30 mg/kg b.w of CA-AgNP, histopathological analysis revealed no significant abnormalities in the kidney, spleen, lungs, heart, testis, or brain. However, 30 mg/kg b.w. of CA-AgNPs caused considerable cell edema and vacuolar degeneration in the liver, which returned to normal at the conclusion of the washout period. The findings of this study suggest that green produced CA-AgNPs at low concentrations could be beneficial.
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6
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Effect of light-dark conditions on inhibition of Gram positive and gram negative bacteria and dye decomposition in the presence of photocatalyst Co/ZnO nanocomposite synthesized by ammonia evaporation method. Photodiagnosis Photodyn Ther 2022; 38:102853. [DOI: 10.1016/j.pdpdt.2022.102853] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2022] [Revised: 03/02/2022] [Accepted: 04/03/2022] [Indexed: 12/17/2022]
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7
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Ettadili F, Aghris S, Laghrib F, Farahi A, Saqrane S, Bakasse M, Lahrich S, El Mhammedi M. Recent advances in the nanoparticles synthesis using plant extract: Applications and future recommendations. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2021.131538] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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8
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Hoffman MP, Lee AY, Nagelj N, Lee YV, Olshansky JH. Mapping the effect of geometry on the radiative rate in core/shell QDs: core size dictates the conduction band offset. RSC Adv 2021; 11:35887-35892. [PMID: 35492800 PMCID: PMC9043225 DOI: 10.1039/d1ra07556j] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2021] [Accepted: 10/29/2021] [Indexed: 12/15/2022] Open
Abstract
Computational models have been developed that can accurately predict the electronic structure and thus optical properties of a variety of quantum dot (QD) materials. However, the application of these models to core/shell and other heterostructured QDs has received less experimental corroboration owing to the difficulty in systematically synthesizing and characterizing large ranges of geometries. In the current work, we synthesized a library of core/shell CdSe/CdS QDs with varying core sizes and shell thicknesses, and have characterized their radiative recombination rates. We find that the core size has only a modest effect on the radiative recombination rates, far less than is predicted by conventional effective mass models. In order to theoretically describe the experimental data, we performed an empirical modification of an effective mass model. We find that the conduction band offset between CdSe and CdS must be empirically altered based on QD core size in order to match our experimental data. This is hypothesized to be a result of reduced interfacial strain in core/shell QDs with smaller cores. The resultant relationship between conduction band offset and core size is used to create a predictive map of radiative lifetime as a function of core size and shell thickness. This map will be useful to researchers implementing CdSe/CdS core/shell QDs for a variety of applications since it can provide geometry specific excited state lifetimes. Predicting the radiative rate in CdSe/CdS core/shell quantum dots is made possible by using a core-size-dependent conduction band offset.![]()
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Affiliation(s)
| | - Autumn Y Lee
- Department of Chemistry, Amherst College Amherst MA 01002 USA
| | - Nejc Nagelj
- Department of Chemistry, Amherst College Amherst MA 01002 USA
| | - Youjin V Lee
- Department of Chemistry, University of California, Berkeley Berkeley CA USA
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9
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Biogenic Nanoparticles: Synthesis, Characterisation and Applications. APPLIED SCIENCES-BASEL 2021. [DOI: 10.3390/app11062598] [Citation(s) in RCA: 39] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Nanotechnology plays a big part in our modern daily lives, ranging from the biomedical sector to the energy sector. There are different physicochemical and biological methods to synthesise nanoparticles towards multiple applications. Biogenic production of nanoparticles through the utilisation of microorganisms provides great advantages over other techniques and is increasingly being explored. This review examines the process of the biogenic synthesis of nanoparticles mediated by microorganisms such as bacteria, fungi and algae, and their applications. Microorganisms offer a disparate environment for nanoparticle synthesis. Optimum production and minimum time to obtain the desired size and shape, to improve the stability of nanoparticles and to optimise specific microorganisms for specific applications are the challenges to address, however. Numerous applications of biogenic nanoparticles in medicine, environment, drug delivery and biochemical sensors are discussed.
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10
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Garcés M, Cáceres L, Chiappetta D, Magnani N, Evelson P. Current understanding of nanoparticle toxicity mechanisms and interactions with biological systems. NEW J CHEM 2021. [DOI: 10.1039/d1nj01415c] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Nanotechnology is an emerging science involving the manipulation of matter on the nanometer scale.
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Affiliation(s)
- Mariana Garcés
- Universidad de Buenos Aires
- Facultad de Farmacia y Bioquímica
- Departamento de Ciencias Químicas
- Cátedra de Química General e Inorgánica
- Buenos Aires
| | - Lourdes Cáceres
- Universidad de Buenos Aires
- Facultad de Farmacia y Bioquímica
- Departamento de Ciencias Químicas
- Cátedra de Química General e Inorgánica
- Buenos Aires
| | - Diego Chiappetta
- Universidad de Buenos Aires
- Facultad de Farmacia y Bioquímica
- Cátedra de Tecnología Farmacéutica I
- Buenos Aires
- Argentina
| | - Natalia Magnani
- Universidad de Buenos Aires
- Facultad de Farmacia y Bioquímica
- Departamento de Ciencias Químicas
- Cátedra de Química General e Inorgánica
- Buenos Aires
| | - Pablo Evelson
- Universidad de Buenos Aires
- Facultad de Farmacia y Bioquímica
- Departamento de Ciencias Químicas
- Cátedra de Química General e Inorgánica
- Buenos Aires
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11
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Porotnikov D, Diroll BT, Harankahage D, Obloy L, Yang M, Cassidy J, Ellison C, Miller E, Rogers S, Tarnovsky AN, Schaller RD, Zamkov M. Low-threshold laser medium utilizing semiconductor nanoshell quantum dots. NANOSCALE 2020; 12:17426-17436. [PMID: 32797122 DOI: 10.1039/d0nr03582c] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Colloidal semiconductor nanocrystals (NCs) represent a promising class of nanomaterials for lasing applications. Currently, one of the key challenges facing the development of high-performance NC optical gain media lies in enhancing the lifetime of biexciton populations. This usually requires the employment of charge-delocalizing particle architectures, such as core/shell NCs, nanorods, and nanoplatelets. Here, we report on a two-dimensional nanoshell quantum dot (QD) morphology that enables a strong delocalization of photoinduced charges, leading to enhanced biexciton lifetimes and low lasing thresholds. A unique combination of a large exciton volume and a smoothed potential gradient across interfaces of the reported CdSbulk/CdSe/CdSshell (core/shell/shell) nanoshell QDs results in strong suppression of Auger processes, which was manifested in this work though the observation of stable amplified stimulated emission (ASE) at low pump fluences. An extensive charge delocalization in nanoshell QDs was confirmed by transient absorption measurements, showing that the presence of a bulk-size core in CdSbulk/CdSe/CdSshell QDs reduces exciton-exciton interactions. Overall, present findings demonstrate unique advantages of the nanoshell QD architecture as a promising optical gain medium in solid-state lighting and lasing applications.
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Affiliation(s)
- Dmitry Porotnikov
- The Center for Photochemical Sciences, Bowling Green State University, Bowling Green, Ohio 43403, USA.
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12
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Kang H, Lee KN, Unithrattil S, Kim HJ, Oh JH, Yoo JS, Im WB, Do YR. Narrow-Band SrMgAl 10O 17:Eu 2+, Mn 2+ Green Phosphors for Wide-Color-Gamut Backlight for LCD Displays. ACS OMEGA 2020; 5:19516-19524. [PMID: 32803045 PMCID: PMC7424587 DOI: 10.1021/acsomega.0c01798] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/19/2020] [Accepted: 07/09/2020] [Indexed: 06/11/2023]
Abstract
The strength of the photoluminescence excitation (PLE) spectrum of SrMgAl10O17:Eu2+, Mn2+ (SAM:Eu2+, Mn2+) phosphor increased at deep blue (∼430 nm) and red-shifted from violet to deep blue with increasing concentrations of both Eu2+ ions Mn2+ ions. Eu2+-Mn2+ energy transfer between Eu2+ ions in Sr-O layer and Mn2+ ions at Al-O tetrahedral sites was maximized, and the photoluminescence (PL) intensity of the narrow-band Mn2+ emission was improved by optimizing the concentrations of Eu2+ and Mn2+ ions. The PL emission spectrum of the (Sr0.6Eu0.4)(Mg0.4Mn0.6)Al10O17 (SAM:Eu2+, Mn2+) phosphor peaks was optimized at 518 nm at a full width at half-maximum (FWHM) of 26 nm under light-emitting diode (LED) excitation at 432 nm LED. The color gamut area of a color-filtered RGB triangle of down-converted white LEDs (DC-WLEDs) incorporated with optimum SAM:Eu2+, Mn2+ green and K2SiF6:Mn4+ (KSF:Mn4+) red phosphors is enlarged by 114% relative to that of the NTSC standard system in the CIE 1931 color space. The luminous efficacy of our DC-WLED was measured and found to be ∼92 lm/W at 20 mA. Increased energy transfers between dual activators and red-shifted band-edge and enhanced intensity of PLE spectrum indicate the possibility of developing dual-activated narrow-band green phosphors for wide-color gamut in an LCD backlighting system.
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Affiliation(s)
- Heejoon Kang
- Department
of Chemistry, Kookmin University, Seongbuk-Gu, Seoul 02703, Republic of Korea
| | - Keyong Nam Lee
- Department
of Chemistry, Kookmin University, Seongbuk-Gu, Seoul 02703, Republic of Korea
| | - Sanjith Unithrattil
- School
of Materials Science and Engineering, Gwangju
Institute of Science and Technology, Oryong-Dong, Buk-Gu, Gwangju 61005, Republic of Korea
| | - Ha Jun Kim
- Division
of Materials Science and Engineering, Hanyang
University, Seoul 04763, Republic of Korea
| | - Ji Hye Oh
- Department
of Chemistry, Kookmin University, Seongbuk-Gu, Seoul 02703, Republic of Korea
| | - Jae Soo Yoo
- Department
of Chemical Engineering, Chung-Ang University, Dongjak-Gu, Seoul 06973, Republic of Korea
| | - Won Bin Im
- Division
of Materials Science and Engineering, Hanyang
University, Seoul 04763, Republic of Korea
| | - Young Rag Do
- Department
of Chemistry, Kookmin University, Seongbuk-Gu, Seoul 02703, Republic of Korea
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13
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14
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Zou H, Wang D, Gong B, Liu Y. Preparation of CdTe superparticles for white light-emitting diodes without Förster resonance energy transfer. RSC Adv 2019; 9:30797-30802. [PMID: 35529356 PMCID: PMC9072219 DOI: 10.1039/c9ra06254h] [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: 08/12/2019] [Accepted: 09/24/2019] [Indexed: 11/21/2022] Open
Abstract
Due to many unique and excellent optical properties, quantum dots (QDs) have been seen as one of the most promising color conversion materials in light-emitting diodes (LEDs). However, the Förster resonance energy transfer (FRET) among different colored QDs always causes a significant red-shift of the fluorescence emission, impeding the fabrication of LEDs with predicted photoluminescence (PL) emission spectra. In this work, we take advantage of CdTe superparticles (SPs), which are assembled by CdTe QDs, as the color conversion materials for the fabrication of WLEDs. Because of their submicron size, the distance between QDs with different emissions can be large enough to avoid the FRET process. More importantly, this method provides us with an opportunity to precisely design and regulate the PL emission spectra of LEDs. By easily overlapping the individual PL spectra of CdTe SPs with different emissions, the certain ratio of their usage for fabricating LEDs with desired PL emission spectra is identified. According to this idea, a WLED with a color rendering index (CRI) of 81, luminous efficacy of 27 lm W-1, and color coordinate at (0.33, 0.34) with the color temperature of 5742 K is achieved.
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Affiliation(s)
- Haoyang Zou
- State Key Laboratory of Supramolecular Structure and Materials, Jilin University Changchun 130012 P. R. China
| | - Deli Wang
- School of Life Sciences, Jilin University Changchun 130012 P. R. China
| | - Baijuan Gong
- Department of Orthodontics, School and Hospital of Stomatology, Jilin University #1500 Qinghua Road Changchun Jilin 130021 P. R. China
| | - Yi Liu
- State Key Laboratory of Supramolecular Structure and Materials, Jilin University Changchun 130012 P. R. China
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15
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Dement DB, Quan MK, Ferry VE. Nanoscale Patterning of Colloidal Nanocrystal Films for Nanophotonic Applications Using Direct Write Electron Beam Lithography. ACS APPLIED MATERIALS & INTERFACES 2019; 11:14970-14979. [PMID: 30932468 DOI: 10.1021/acsami.9b01159] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
The small size of colloidal nanocrystal quantum dots (QDs) leads to a variety of unique optical properties that are well-suited to nanophotonics, including bright, tunable photoluminescence (PL). However, exploring the properties of solid QD assemblies at the nanoscale has proven challenging because of the limitations in the nanoscale QD patterning methods. Generally, the precise placement of QD solids is difficult to achieve, especially for tall structures with multiple QD layers, and when it is achieved the patterns often cannot withstand the further processing steps required for final device construction. Direct electron beam lithography of QDs has emerged as a straightforward patterning process that does not require ligand exchange and results in structures that retain bright PL. Here, we demonstrate that direct patterning QD films on substrates treated with a self-assembled monolayer of octadecyltrichlorosilane allows us to create feature sizes as thin as 30 nm with heights of multiple layers and characterize the pattern resolution, robustness, and placement accuracy. These structures withstand sonication in a variety of solvents, and the structures are placed within 20 nm of their intended location nearly 100% of the time. We further show how this patterning method can be applied to nanophotonics by measuring the complex refractive index of the QD materials to model the absorption and scattering cross sections of QD structures of various sizes and shapes. These simulations reveal that edge effects arising from the finite shape of the QD nanostructure lead to substantial absorption enhancement when compared to an equivalent volume region taken from a continuous QD film. Finally, we explore more complex structures by patterning QD arrays, multilayer QD structures, and QD disks inside plasmonic resonators.
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Affiliation(s)
- Dana B Dement
- Department of Chemical Engineering and Materials Science , University of Minnesota , 421 Washington Avenue SE , Minneapolis , Minnesota 55455 , United States
| | - Matthew K Quan
- Department of Chemical Engineering and Materials Science , University of Minnesota , 421 Washington Avenue SE , Minneapolis , Minnesota 55455 , United States
| | - Vivian E Ferry
- Department of Chemical Engineering and Materials Science , University of Minnesota , 421 Washington Avenue SE , Minneapolis , Minnesota 55455 , United States
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16
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Antolini F, Orazi L. Quantum Dots Synthesis Through Direct Laser Patterning: A Review. Front Chem 2019; 7:252. [PMID: 31058137 PMCID: PMC6478899 DOI: 10.3389/fchem.2019.00252] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2018] [Accepted: 03/29/2019] [Indexed: 11/24/2022] Open
Abstract
In this brief review the advances on Direct Laser Patterning (DLP) for the synthesis of photo-luminescent semiconductor quantum dots (QDs) belonging to II-VI groups, especially in solid state using laser-assisted conversion are reported and commented. The chemistry of the precursor synthesis is illustrated because it is a crucial step for the development of the direct laser patterning of QDs. In particular, the analysis of cadmium (bis)thiolate and cadmium xanthates precursors after thermal and laser treatment is examined, with a special focus on the optical properties of the formed QDs. The second part of the review examines how the laser parameters such as the wavelength and pulse duration may regulate the properties of the patterned QDs. The DLP technique does not require complex laser systems or the use of dangerous chemical post treatments, so it can be introduced as a potential method for the patterning of pixels in quantum dot light emitting diodes (QD-LEDs) for display manufacturing.
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Affiliation(s)
- Francesco Antolini
- Photonics Micro and Nanostructures Laboratory, Physical Technologies for Safety and Health Division, Fusion and Technologies for Nuclear Safety and Security Department, ENEA, Frascati, Italy
| | - Leonardo Orazi
- Department of Sciences and Methods for Engineering, University of Modena and Reggio Emilia, Reggio Emilia, Italy
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17
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Das S, Dutta A, Bera R, Patra A. Ultrafast carrier dynamics in 2D-2D hybrid structures of functionalized GO and CdSe nanoplatelets. Phys Chem Chem Phys 2019; 21:15568-15575. [PMID: 31265037 DOI: 10.1039/c9cp02823d] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Considerable attention has been paid to designing graphene based 2D hybrid nanostructures for their potential applications in various areas from healthcare to energy harvesting. Herein, we have prepared 2D-2D hybrid structures of 2D CdSe nanoplatelets (NPLs) with thiol (-SH) functionalized reduced graphene oxide (G-Ph-SH). Microscopic and spectroscopic studies reveal that the G-Ph-SH surface is successfully decorated by CdSe NPLs through a thiophenol (-SH) linker. The significant photoluminescence quenching (65%) and the shortening of decay time from 1 ns to 0.4 ns of CdSe NPLs are observed after adding 100 μg of G-Ph-SH. Furthermore, the femto-second transient absorption spectroscopic (fs-TAS) study reveals that the growth time of CdSe NPLs in the composite is reduced to 0.4 ps from 0.8 ps due to faster hot electron cooling. A faster component of 1.4 ps in the kinetic parameters of the composite system further suggests that the ultrafast electron transfer occurs from the conduction band of CdSe NPLs to surface functionalized reduced graphene oxide. This type of 2D-2D hybrid structure may open up new possibilities in light harvesting applications.
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Affiliation(s)
- Soma Das
- School of Materials Sciences, Indian Association for the Cultivation of Science, Kolkata 700 032, India.
| | - Avisek Dutta
- School of Materials Sciences, Indian Association for the Cultivation of Science, Kolkata 700 032, India.
| | - Rajesh Bera
- School of Materials Sciences, Indian Association for the Cultivation of Science, Kolkata 700 032, India.
| | - Amitava Patra
- School of Materials Sciences, Indian Association for the Cultivation of Science, Kolkata 700 032, India.
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18
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Hu Z, Singh A, Goupalov SV, Hollingsworth JA, Htoon H. Influence of morphology on the blinking mechanisms and the excitonic fine structure of single colloidal nanoplatelets. NANOSCALE 2018; 10:22861-22870. [PMID: 30488930 DOI: 10.1039/c8nr06234j] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Colloidal semiconductor nanoplatelets with a similar electronic structure as quantum wells have recently emerged as exciting materials for optoelectronic applications. Here we investigate how morphology affects important photoluminescence properties of single CdSe and core/shell CdSe/CdZnS nanoplatelets. By analyzing photoluminescence intensity-lifetime correlation and second-order photon correlation results, we demonstrate that, irrespective of the morphology, Auger recombination plays only a minor role in dictating the blinking behavior of the nanoplatelets. We find that a rough shell induces additional nonradiative channels presumably related to defects or traps of an imperfect shell. Furthermore, polarization-resolved spectroscopy analysis reveals exciton fine-structure splitting of the order of several tens of meV in rough-shell nanoplatelets at room temperature, which is attributed to exciton localization and is substantiated by theoretical calculations taking into account the nanoplatelet shape and electron-hole exchange interaction.
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Affiliation(s)
- Zhongjian Hu
- Center for Integrated Nanotechnologies, Material Physics and Applications Division, Los Alamos National Laboratory, Los Alamos, NM 87545, USA.
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19
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Yang H, Huang B, Zhang L, Yuan Y, Xiang W, Cui Y, Zhang J. "Giant" quantum dots encapsulated inside a freeform lens. APPLIED OPTICS 2018; 57:10317-10322. [PMID: 30645244 DOI: 10.1364/ao.57.010317] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/03/2018] [Accepted: 11/12/2018] [Indexed: 06/09/2023]
Abstract
A freeform lens containing giant red and green quantum dots (QDs) was designed to be used for a direct-illumination-type LED backlight wide-color-gamut display. Encapsulating the QDs with the freeform lens enabled us to not only expand the illumination area, where the uniform lighting area was about 2 cm in radius on the plane 1.5 cm above the LED, but to also avoid QDs coming into direct contact with the LED chip, which reduced the QDs' surrounding temperature from 94°C to 61°C. Moreover, this encapsulation and the thick shell of the QDs significantly improved the device's lifetime up to more than 100 h due to the reduced temperature. A color gamut of ∼130% of the National Television Systems Committee standard was obtained with the freeform lens.
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20
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Liu J, Song B, Li J, Tian X, Ma Y, Yang K, Yuan B. Photoluminescence modulation of silicon nanoparticles via highly ordered arrangement with phospholipid membranes. Colloids Surf B Biointerfaces 2018; 170:656-662. [PMID: 29986261 DOI: 10.1016/j.colsurfb.2018.06.066] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2018] [Revised: 06/12/2018] [Accepted: 06/30/2018] [Indexed: 11/18/2022]
Abstract
Highly ordered self-assembly of nanoparticles (NPs) in a large scale promises attractive potential in optical modulation of the NPs for illuminating, imaging and sensing applications. In this work, a type of multi-lamellar nanocomposite membranes composed of phospholipid multilayers and Si NPs sandwiched between each adjacent lipid layers was fabricated via a facile co-assembly method. X-ray reflectivity (XRR), grazing incident X-ray diffraction (GIXRD) and TEM measurements verified the highly ordered arrangement of NPs within the multilayers with a controlled in-plane inter-particle separation from ∼7 nm to ∼14 nm. Due to such an arrangement, the photoluminescence (PL) properties of the Si NPs were effectively modulated. Compared to the NPs in suspension or its pure film, the PL of the NPs in the membranes blue-shifted and remarkably narrowed, with the full-width-at-half-maximum (FWHM) value reduced from >110 nm of the pure Si NP film to below 43 nm. The radiative lifetime of the NPs was also significantly reduced from ∼16.7 ns to ∼3.3 ns depending on the inter-particle distance in the membrane. Meanwhile, the Si NPs within membranes maintained robust photostability under UV irradiation.
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Affiliation(s)
- Jiaojiao Liu
- Center for Soft Condensed Matter Physics and Interdisciplinary Research, School of Physical Science and Technology, Soochow University, Suzhou, 215006, PR China
| | - Bin Song
- Institute of Functional Nano and Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University, Suzhou, 215123, PR China
| | - Jingliang Li
- Institute for Frontier Materials, Deakin University, Geelong, Australia
| | - Xiaodong Tian
- Department of Thoracic Surgery, Chinese PLA General Hospital, Beijing, 100853, PR China
| | - Yuqiang Ma
- Center for Soft Condensed Matter Physics and Interdisciplinary Research, School of Physical Science and Technology, Soochow University, Suzhou, 215006, PR China; National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing, 210093, PR China
| | - Kai Yang
- Center for Soft Condensed Matter Physics and Interdisciplinary Research, School of Physical Science and Technology, Soochow University, Suzhou, 215006, PR China.
| | - Bing Yuan
- Center for Soft Condensed Matter Physics and Interdisciplinary Research, School of Physical Science and Technology, Soochow University, Suzhou, 215006, PR China.
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21
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Chen S, Yan C, Tang Y, Li J, Ding X, Rao L, Li Z. Improvement in Luminous Efficacy and Thermal Performance Using Quantum Dots Spherical Shell for White Light Emitting Diodes. NANOMATERIALS 2018; 8:nano8080618. [PMID: 30111690 PMCID: PMC6116266 DOI: 10.3390/nano8080618] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/19/2018] [Revised: 08/07/2018] [Accepted: 08/09/2018] [Indexed: 11/17/2022]
Abstract
White light-emitting diodes (WLEDs) based on quantum dots (QDs) are gaining increasing attention due to their excellent color quality. QDs films with planar structure are universally applied in WLEDs for color conversion, while they still face great challenges in high light extraction and thermal stability. In this study, a QDs film with a spherical shell structure was proposed to improve the optical and thermal performance for WLEDs. Compared with the conventional planar structure, the luminous efficacy of the QDs spherical shell structure is improved by 12.9% due to the reduced total reflection effect, and the angular-dependent correlated color temperature deviation is decreased from 2642 to 283 K. Moreover, the highest temperature of the WLED using a QDs spherical shell is 4.8 °C lower than that of the conventional WLED with a planar structure, which is mainly attributed to larger heat dissipation area and separated heat source. Consequently, this QDs spherical shell structure demonstrates superior performance of QDs films for WLEDs applications.
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Affiliation(s)
- Songmao Chen
- Key Laboratory of Surface Functional Structure Manufacturing of Guangdong High Education Institutes, South China University of Technology, Guangzhou 510641, China.
| | - Caiman Yan
- Key Laboratory of Surface Functional Structure Manufacturing of Guangdong High Education Institutes, South China University of Technology, Guangzhou 510641, China.
| | - Yong Tang
- Key Laboratory of Surface Functional Structure Manufacturing of Guangdong High Education Institutes, South China University of Technology, Guangzhou 510641, China.
| | - Jiasheng Li
- Key Laboratory of Surface Functional Structure Manufacturing of Guangdong High Education Institutes, South China University of Technology, Guangzhou 510641, China.
- Foshan Nationstar Optoelectronics Company Ltd., Foshan 528000, China.
| | - Xinrui Ding
- Key Laboratory of Surface Functional Structure Manufacturing of Guangdong High Education Institutes, South China University of Technology, Guangzhou 510641, China.
| | - Longshi Rao
- Key Laboratory of Surface Functional Structure Manufacturing of Guangdong High Education Institutes, South China University of Technology, Guangzhou 510641, China.
| | - Zongtao Li
- Key Laboratory of Surface Functional Structure Manufacturing of Guangdong High Education Institutes, South China University of Technology, Guangzhou 510641, China.
- Foshan Nationstar Optoelectronics Company Ltd., Foshan 528000, China.
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22
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Yoon YS, Lee CK, Kang SO, Kim SW. Comparison of Contrast Sensitivity and Color Vision according to the Different Illumination in Patients with Cataract. JOURNAL OF THE KOREAN OPHTHALMOLOGICAL SOCIETY 2018. [DOI: 10.3341/jkos.2018.59.7.622] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Affiliation(s)
- Yo Sep Yoon
- Department of Ophthalmology, Ulsan University Hospital, University of Ulsan College of Medicine, Ulsan, Korea
| | - Chang Kyu Lee
- Department of Ophthalmology, Ulsan University Hospital, University of Ulsan College of Medicine, Ulsan, Korea
| | - Sang Ook Kang
- Department of Materials Chemistry, Korea University College of Science and Technology, Sejong, Korea
| | - Sang Woo Kim
- Department of Ophthalmology, Ulsan University Hospital, University of Ulsan College of Medicine, Ulsan, Korea
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23
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Santiago-González B, Monguzzi A, Pinchetti V, Casu A, Prato M, Lorenzi R, Campione M, Chiodini N, Santambrogio C, Meinardi F, Manna L, Brovelli S. "Quantized" Doping of Individual Colloidal Nanocrystals Using Size-Focused Metal Quantum Clusters. ACS NANO 2017; 11:6233-6242. [PMID: 28485979 DOI: 10.1021/acsnano.7b02369] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The insertion of intentional impurities, commonly referred to as doping, into colloidal semiconductor quantum dots (QDs) is a powerful paradigm for tailoring their electronic, optical, and magnetic behaviors beyond what is obtained with size-control and heterostructuring motifs. Advancements in colloidal chemistry have led to nearly atomic precision of the doping level in both lightly and heavily doped QDs. The doping strategies currently available, however, operate at the ensemble level, resulting in a Poisson distribution of impurities across the QD population. To date, the synthesis of monodisperse ensembles of QDs individually doped with an identical number of impurity atoms is still an open challenge, and its achievement would enable the realization of advanced QD devices, such as optically/electrically controlled magnetic memories and intragap state transistors and solar cells, that rely on the precise tuning of the impurity states (i.e., number of unpaired spins, energy and width of impurity levels) within the QD host. The only approach reported to date relies on QD seeding with organometallic precursors that are intrinsically unstable and strongly affected by chemical or environmental degradation, which prevents the concept from reaching its full potential and makes the method unsuitable for aqueous synthesis routes. Here, we overcome these issues by demonstrating a doping strategy that bridges two traditionally orthogonal nanostructured material systems, namely, QDs and metal quantum clusters composed of a "magic number" of atoms held together by stable metal-to-metal bonds. Specifically, we use clusters composed of four copper atoms (Cu4) capped with d-penicillamine to seed the growth of CdS QDs in water at room temperature. The elemental analysis, performed by electrospray ionization mass spectrometry, X-ray fluorescence, and inductively coupled plasma mass spectrometry, side by side with optical spectroscopy and transmission electron microscopy measurements, indicates that each Cu:CdS QD in the ensemble incorporates four Cu atoms originating from one Cu4 cluster, which acts as a "quantized" source of dopant impurities.
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Affiliation(s)
- Beatriz Santiago-González
- Dipartimento di Scienza dei Materiali, Università degli Studi di Milano-Bicocca , Via R. Cozzi 55, IT-20125 Milano, Italy
| | - Angelo Monguzzi
- Dipartimento di Scienza dei Materiali, Università degli Studi di Milano-Bicocca , Via R. Cozzi 55, IT-20125 Milano, Italy
| | - Valerio Pinchetti
- Dipartimento di Scienza dei Materiali, Università degli Studi di Milano-Bicocca , Via R. Cozzi 55, IT-20125 Milano, Italy
| | - Alberto Casu
- Nanochemistry Department, Istituto Italiano di Tecnologia , Via Morego 30, IT-16163 Genova, Italy
| | - Mirko Prato
- Materials Characterization Facility, Istituto Italiano di Tecnologia , Via Morego 30, IT-16163 Genova, Italy
| | - Roberto Lorenzi
- Dipartimento di Scienza dei Materiali, Università degli Studi di Milano-Bicocca , Via R. Cozzi 55, IT-20125 Milano, Italy
| | - Marcello Campione
- Dipartimento di Scienze dell'Ambiente e della Terra, Università degli Studi di Milano-Bicocca , Piazza della Scienza 4, IT-20126 Milano, Italy
| | - Norberto Chiodini
- Dipartimento di Scienza dei Materiali, Università degli Studi di Milano-Bicocca , Via R. Cozzi 55, IT-20125 Milano, Italy
| | - Carlo Santambrogio
- Dipartimento di Biotecnologie e Bioscienze, Università degli Studi di Milano-Bicocca Piazza della Scienza 2, IT-20126 Milano, Italy
| | - Francesco Meinardi
- Dipartimento di Scienza dei Materiali, Università degli Studi di Milano-Bicocca , Via R. Cozzi 55, IT-20125 Milano, Italy
| | - Liberato Manna
- Nanochemistry Department, Istituto Italiano di Tecnologia , Via Morego 30, IT-16163 Genova, Italy
| | - Sergio Brovelli
- Dipartimento di Scienza dei Materiali, Università degli Studi di Milano-Bicocca , Via R. Cozzi 55, IT-20125 Milano, Italy
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24
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Verma R, Gangwar J, Srivastava AK. Multiphase TiO2nanostructures: a review of efficient synthesis, growth mechanism, probing capabilities, and applications in bio-safety and health. RSC Adv 2017. [DOI: 10.1039/c7ra06925a] [Citation(s) in RCA: 101] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
This review article provides an exhaustive overview of efficient synthesis, growth mechanism and research activities of multiphase TiO2nanostructures to provide their structural, morphological, optical and biological properties co-relations.
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Affiliation(s)
- Rajni Verma
- Academy of Scientific and Innovative Research
- CSIR – National Physical Laboratory
- New Delhi – 110 012
- India
- Sophisticated and Analytical Equipments Division
| | - Jitendra Gangwar
- Sophisticated and Analytical Equipments Division
- CSIR – National Physical Laboratory
- New Delhi – 110 012
- India
- Department of Physics
| | - Avanish K. Srivastava
- Academy of Scientific and Innovative Research
- CSIR – National Physical Laboratory
- New Delhi – 110 012
- India
- Sophisticated and Analytical Equipments Division
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