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Sha T, Zhang X, Zhou R, Du G, Xiong Y, Pan Q, Yao J, Feng Z, Gao X, You Y. Organic-Inorganic Hybrid Perovskite Ferroelectric Nanosheets Synthesized by a Room-Temperature Antisolvent Method. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2024; 11:e2400636. [PMID: 38778554 PMCID: PMC11304249 DOI: 10.1002/advs.202400636] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/17/2024] [Revised: 04/17/2024] [Indexed: 05/25/2024]
Abstract
Over the past years, the application potential of ferroelectric nanomaterials with unique physical properties for modern electronics is highlighted to a large extent. However, it is relatively challenging to fabricate inorganic ferroelectric nanomaterials, which is a process depending on a vacuum atmosphere at high temperatures. As significant complements to inorganic ferroelectric nanomaterials, the nanomaterials of molecular ferroelectrics are rarely reported. Here a low-cost room-temperature antisolvent method is used to synthesize free-standing 2D organic-inorganic hybrid perovskite (OIHP) ferroelectric nanosheets (NSs), that is, (CHA)2PbBr4 NSs (CHA = cyclohexylammonium), with an average lateral size of 357.59 nm and a thickness ranging from 10 to 70 nm. This method shows high repeatability and produces NSs with excellent crystallinity. Moreover, ferroelectric domains in single NSs can be clearly visualized and manipulated using piezoresponse force microscopy (PFM). The domain switching and PFM-switching spectroscopy indicate the robust in-plane ferroelectricity of the NSs. This work not only introduces a feasible, low-cost, and scalable method for preparing molecular ferroelectric NSs but also promotes the research on molecular ferroelectric nanomaterials.
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Affiliation(s)
- Tai‐Ting Sha
- Jiangsu Key Laboratory for Science and Applications of Molecular FerroelectricsSoutheast UniversityNanjing211189P. R. China
| | - Xing‐Chen Zhang
- Guangdong Provincial Key Laboratory of Quantum Engineering and Quantum Materials and Institute for Advanced MaterialsSouth China Academy of Advanced OptoelectronicsSouth China Normal UniversityGuangzhou510006P. R. China
| | - Ru‐Jie Zhou
- Jiangsu Key Laboratory for Science and Applications of Molecular FerroelectricsSoutheast UniversityNanjing211189P. R. China
| | - Guo‐Wei Du
- Jiangsu Key Laboratory for Science and Applications of Molecular FerroelectricsSoutheast UniversityNanjing211189P. R. China
| | - Yu‐An Xiong
- Jiangsu Key Laboratory for Science and Applications of Molecular FerroelectricsSoutheast UniversityNanjing211189P. R. China
| | - Qiang Pan
- Jiangsu Key Laboratory for Science and Applications of Molecular FerroelectricsSoutheast UniversityNanjing211189P. R. China
| | - Jie Yao
- Jiangsu Key Laboratory for Science and Applications of Molecular FerroelectricsSoutheast UniversityNanjing211189P. R. China
| | - Zi‐Jie Feng
- Jiangsu Key Laboratory for Science and Applications of Molecular FerroelectricsSoutheast UniversityNanjing211189P. R. China
| | - Xing‐Sen Gao
- Guangdong Provincial Key Laboratory of Quantum Engineering and Quantum Materials and Institute for Advanced MaterialsSouth China Academy of Advanced OptoelectronicsSouth China Normal UniversityGuangzhou510006P. R. China
| | - Yu‐Meng You
- Jiangsu Key Laboratory for Science and Applications of Molecular FerroelectricsSoutheast UniversityNanjing211189P. R. China
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Shen B, Zhang JH, Liu Y, Ma J, Li Y, Hao X, Zhang R. Enhanced Absolute Recovered Energy under Low Electric Field in All-Inorganic 0-3 Nanocomposition Thick Films. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024; 20:e2309486. [PMID: 38174606 DOI: 10.1002/smll.202309486] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/19/2023] [Revised: 12/19/2023] [Indexed: 01/05/2024]
Abstract
Inorganic thick-film dielectric capacitors with ultrahigh absolute recovered energy at low electric fields are extremely desired for their wide application in pulsed power systems. However, a long-standing technological bottleneck exists between high absolute energy and large recovered energy density. A new strategy is offered to fabricate selected all-inorganic 0-3 composite thick films up to 10 µm by a modified sol-slurry method. Here, the ceramic powder is dispersed into the sol-gel matrix to form a uniform suspension, assisted by powder, therefore, the 2 µm-thickness after single layer spin coating. To enhance the energy-storage performances, the composites process is thoroughly optimized by ultrafine powder (<50 nm) technique based on a low-cost coprecipitation method instead of the solid-state and sol-gel methods. 0D coprecipitation powder has a similar dielectric constant to the corresponding 3D films, thus uneven electrical field distributions is overcome. Moreover, the increase of interfacial polarization is realized due to the larger specific surface area. A maximum recoverable energy density of 14.62 J cm-3 is obtained in coprecipitation thick films ≈2.2 times that of the solid-state powder and ≈1.3 times for sol-gel powder. This study provides a new paradigm for further guiding the design of composite materials.
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Affiliation(s)
- Bingzhong Shen
- Functional Materials and Acousto-optic Instruments Institute, School of Instrumentation Science and Engineering, Harbin Institute of Technology, Harbin, 150080, P. R. China
| | - Jia-Han Zhang
- Collaborative Innovation Center of Advanced Microstructures, School of Electronic Science and Engineering, Nanjing University, Nanjing, 210093, P. R. China
| | - Yang Liu
- Functional Materials and Acousto-optic Instruments Institute, School of Instrumentation Science and Engineering, Harbin Institute of Technology, Harbin, 150080, P. R. China
| | - Jinpeng Ma
- Functional Materials and Acousto-optic Instruments Institute, School of Instrumentation Science and Engineering, Harbin Institute of Technology, Harbin, 150080, P. R. China
| | - Yong Li
- Inner Mongolia Key Laboratory of Ferroelectric-Related New Energy Materials and Devices, Inner Mongolia University of Science and Technology, Baotou, 014010, P. R. China
| | - Xihong Hao
- Inner Mongolia Key Laboratory of Ferroelectric-Related New Energy Materials and Devices, Inner Mongolia University of Science and Technology, Baotou, 014010, P. R. China
| | - Rui Zhang
- Functional Materials and Acousto-optic Instruments Institute, School of Instrumentation Science and Engineering, Harbin Institute of Technology, Harbin, 150080, P. R. China
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3
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S A, Vidya YS, Manjunatha HC, Prashantha SC, Kottam N, Sridhar KN, Damodara Gupta PS, Mahendrakumar C. Photoluminescence, antibacterial, X-ray/gamma ray absorption, supercapacitor and sensor applications of ZrTiO 4 nanorods. RSC Adv 2023; 13:14782-14796. [PMID: 37197183 PMCID: PMC10184272 DOI: 10.1039/d3ra00908d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2023] [Accepted: 04/13/2023] [Indexed: 05/19/2023] Open
Abstract
In the present communication, ZrTiO4 nanoparticles (NPs) are synthesized by the solution combustion method using urea (ZTOU) and oxalyl dihydrazide (ODH) (ZTODH) as fuel and calcined at 700 °C. The synthesized samples were characterized with different techniques. Powder X-ray diffraction studies show the presence of diffraction peaks corresponding to ZrTiO4. In addition to these peaks, a few additional peaks corresponding to the monoclinic and cubic phases of ZrO2 and the rutile phase of TiO2 are observed. The surface morphology of ZTOU and ZTODH consists of nanorods with different lengths. The TEM and HRTEM images confirm the formation of nanorods along with NPs, and the estimated crystallite size matches well with that of PXRD. The direct energy band gap was calculated using Wood and Tauc's relation and was found to be 2.7 and 3.2 eV for ZTOU and ZTODH respectively. The photoluminescence emission peaks (λ = 350 nm), CIE and CCT of ZTOU and ZTODH clearly confirm that the present nanophosphor might be a good nanophosphor material for blue or aqua green light emitting diodes. Furthermore, antibacterial activity and a viability test were conducted on two food borne pathogens. The X-ray/gamma ray absorption properties are also studied, which clearly show the ZrTiO4 might be a good absorbing material. Furthermore, cyclic voltammetry (CV) analysis of ZTOU nanorods shows very good redox peaks compared to that of ZTODH. From the electrochemical impedance spectroscopy (EIS) measurements, the charge-transfer resistances for prepared nanorods ZTOU and ZTODH are found to be 151.6 Ω, and 184.5 Ω respectively. The modified graphite electrode with ZTOU shows good sensing activity for both paracetamol and ascorbic acid, compared to ZTODH.
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Affiliation(s)
- Akshay S
- Department of Physics, Maharani Lakshmi Ammanni College for Women Autonomous Malleshwaram Bengaluru 560012 Karnataka India
- Department of Physics, East West Institute of Technology Bengaluru 560091 Karnataka India
| | - Y S Vidya
- Department of Physics, Lal Bahadur Shastri Government First Grade College RT Nagar Bangalore 560032 Karnataka India
| | - H C Manjunatha
- Department of Physics, Government College for Women Kolar 563101 Karnataka India
| | - S C Prashantha
- Department of Physics, East West Institute of Technology Bengaluru 560091 Karnataka India
| | - Nagaraju Kottam
- Department of Chemistry, M S Ramaiah Institute of Technology affiliated to Visvesvaraya Technological University Belguam Bengaluru 560054 Karnataka India
| | - K N Sridhar
- Department of Physics, Government First Grade College Kolar 563101 Karnataka India
| | - P S Damodara Gupta
- Department of Physics, Government College for Women Kolar 563101 Karnataka India
| | - C Mahendrakumar
- Department of Biotechnology, Government First Grade College Kolar 563101 Karnataka India
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Concomitant structural and ferroelectric properties of Sr2Bi4Ti5O18 ceramics sintered with (K0.41Na0.53Li0.06)(Nb0.89Sb0.06Ta0.05)O3 perovskite. J SOLID STATE CHEM 2022. [DOI: 10.1016/j.jssc.2022.122959] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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5
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UV-Light Mediated Biosynthesis of Silver Nanowires; Characterization, Dye Degradation Potential and Kinetic Studies. SUSTAINABILITY 2021. [DOI: 10.3390/su132313220] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Herrin, a simple and eco-friendly method for the synthesis of silver nanowires (Ag-NWs) has been reported. Silver nanowires were synthesized using Psidium guajava seed extract that acted as a reducing agent as well as a stabilizing agent for silver nitrate solution. Synthesis was carried out at 50 °C temperature under continuous UV-irradiation. Silver nanowires were initially characterized by a UV-visible and FTIR spectrophotometer. In addition, morphology and particle size of synthesized Ag-NWs were determined using Field Emission Scanning Electron Microscopy and X-ray diffraction (XRD) techniques. Nanowires were found to have 12.8 μm length and 200–500 nm diameter and cubic phase morphology. Furthermore, the catalytic potential of Ag-NWs for the degradation of methyl orange dye (MO) was determined. The selected dye was degraded successfully that confirmed the catalytic potential of Ag-NWs. The authors concluded that Ag-NWs can be synthesized using plant extract having excellent morphological features as well as impressive catalytic potential.
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Ferreira MC, Pimentel B, Andrade V, Zverev V, Gimaev RR, Pomorov AS, Pyatakov A, Alekhina Y, Komlev A, Makarova L, Perov N, Reis MS. Understanding the Dependence of Nanoparticles Magnetothermal Properties on Their Size for Hyperthermia Applications: A Case Study for La-Sr Manganites. NANOMATERIALS (BASEL, SWITZERLAND) 2021; 11:1826. [PMID: 34361221 PMCID: PMC8308361 DOI: 10.3390/nano11071826] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/21/2021] [Revised: 07/08/2021] [Accepted: 07/09/2021] [Indexed: 01/24/2023]
Abstract
Magnetic oxides are promising materials for alternative health diagnoses and treatments. The aim of this work is to understand the dependence of the heating power with the nanoparticle (NP) mean size, for the manganite composition La0.75Sr0.25MnO3 (LSMO)-the one with maximum critical temperature for the whole La/Sr ratio of the series. We have prepared four different samples, each one annealed at different temperatures, in order to produce different mean NP sizes, ranging from 26 nm up to 106 nm. Magnetization measurements revealed a FC-ZFC irreversibility and from the coercive field as function of temperature we determined the blocking temperature. A phase diagram was delivered as a function of the NP mean size and, based on this, the heating mechanism understood. Small NPs (26 nm) is heated up within the paramagnetic range of temperature (T>Tc), and therefore provide low heating efficiency; while bigger NPs are heated up, from room temperature, within the magnetically blocked range of temperature (TT>TB), for intermediate mean diameter size of 37 nm, with maximum efficiency of heat transfer.
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Affiliation(s)
- Mylla C. Ferreira
- Institute of Physics, Fluminense Federal University, Niterói 24210-346, RJ, Brazil; (M.C.F.); (B.P.)
| | - Bruno Pimentel
- Institute of Physics, Fluminense Federal University, Niterói 24210-346, RJ, Brazil; (M.C.F.); (B.P.)
| | - Vivian Andrade
- IFIMUP—Institute of Physics for Advanced Materials, Nanotechnology and Photonics of University of Porto, 4169-007 Porto, Portugal;
- ”Gleb Wataghin” Physics Institute, State University of Campinas, Campinas 13083-859, SP, Brazil
| | - Vladimir Zverev
- Faculty of Physics, Moscow State University, 119991 Moscow, Russia; (V.Z.); (R.R.G.); (A.S.P.); (A.P.); (Y.A.); (A.K.); (L.M.); (N.P.)
| | - Radel R. Gimaev
- Faculty of Physics, Moscow State University, 119991 Moscow, Russia; (V.Z.); (R.R.G.); (A.S.P.); (A.P.); (Y.A.); (A.K.); (L.M.); (N.P.)
| | - Andrei S. Pomorov
- Faculty of Physics, Moscow State University, 119991 Moscow, Russia; (V.Z.); (R.R.G.); (A.S.P.); (A.P.); (Y.A.); (A.K.); (L.M.); (N.P.)
| | - Alexander Pyatakov
- Faculty of Physics, Moscow State University, 119991 Moscow, Russia; (V.Z.); (R.R.G.); (A.S.P.); (A.P.); (Y.A.); (A.K.); (L.M.); (N.P.)
| | - Yulia Alekhina
- Faculty of Physics, Moscow State University, 119991 Moscow, Russia; (V.Z.); (R.R.G.); (A.S.P.); (A.P.); (Y.A.); (A.K.); (L.M.); (N.P.)
| | - Aleksei Komlev
- Faculty of Physics, Moscow State University, 119991 Moscow, Russia; (V.Z.); (R.R.G.); (A.S.P.); (A.P.); (Y.A.); (A.K.); (L.M.); (N.P.)
| | - Liudmila Makarova
- Faculty of Physics, Moscow State University, 119991 Moscow, Russia; (V.Z.); (R.R.G.); (A.S.P.); (A.P.); (Y.A.); (A.K.); (L.M.); (N.P.)
| | - Nikolai Perov
- Faculty of Physics, Moscow State University, 119991 Moscow, Russia; (V.Z.); (R.R.G.); (A.S.P.); (A.P.); (Y.A.); (A.K.); (L.M.); (N.P.)
| | - Mario S. Reis
- Institute of Physics, Fluminense Federal University, Niterói 24210-346, RJ, Brazil; (M.C.F.); (B.P.)
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Alhaddad M, Ismail AA, Zaki ZI. Hydrogen Generation over RuO 2 Nanoparticle-Decorated LaNaTaO 3 Perovskite Photocatalysts under UV Exposure. ACS OMEGA 2021; 6:10250-10259. [PMID: 34056179 PMCID: PMC8153752 DOI: 10.1021/acsomega.1c00584] [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: 02/01/2021] [Accepted: 03/31/2021] [Indexed: 06/12/2023]
Abstract
The efficacy of LaNaTaO3 perovskites decoration RuO2 at diverse contents for the photocatalytic H2 generation has been explored in this study. The photocatalytic performance of RuO2 co-catalyst onto mesoporous LaNaTaO3 was evaluated for H2 under UV illumination. 3%RuO2/LaNaTaO3 perovskite photocatalyst revealed the highest photocatalytic H2 generation performance, indicating that RuO2 nanoparticles could promote the photocatalytic efficiency of LaNaTaO3 perovskite significantly. The H2 evolution rate of 3%RuO2/LaNaTaO3 perovskite is 11.6 and 1.3 times greater than that of bare LaNaTaO3 perovskite employing either 10% CH3OH or pure H2O, respectively. Interestingly, the photonic efficiency of 3%RuO2/LaNaTaO3 perovskite was enhanced 10 times than LaNaTaO3 perovskite in the presence of aqueous CH3OH solutions as a hole sacrificial agent. The high separation of charge carriers is interpreted by the efficient hole capture using CH3OH, hence leading to greater H2 generation over RuO2/LaNaTaO3 perovskites. This is attributed to an adjustment position between recombination electron-hole pairs and also the reduction of potential conduction alignment as a result of RuO2 incorporation. The suggested mechanisms of RuO2/LaNaTaO3 perovskites for H2 generation employing either CH3OH or pure H2O were discussed. The photocatalytic performances of the perovskite photocatalyst were elucidated according to the PL intensity and the photocurrent response investigations.
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Affiliation(s)
- Maha Alhaddad
- Department
of Chemistry, Faculty of Science, King Abdulaziz
University, P.O. Box 80203, Jeddah 21589, Saudi Arabia
| | - Adel A. Ismail
- Advanced
Materials Department, Central Metallurgical
R&D Institute, CMRDI, P.O. Box 87, Helwan, Cairo 11421, Egypt
| | - Zaki I. Zaki
- Department
of Chemistry, College of Science, Taif University, P.O. Box 11099, Taif 21944, Saudi Arabia
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Bomhard S, Schramm J, Bleul R, Thiermann R, Höbel P, Krtschil U, Löb P, Maskos M. Modular Manufacturing Platform for Continuous Synthesis and Analysis of Versatile Nanomaterials. Chem Eng Technol 2019. [DOI: 10.1002/ceat.201900115] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Sibylle Bomhard
- Fraunhofer Institute for Microengineering and Microsystems IMM Carl-Zeiss-Strasse 18–20 55129 Mainz Germany
| | - Jonas Schramm
- Fraunhofer Institute for Microengineering and Microsystems IMM Carl-Zeiss-Strasse 18–20 55129 Mainz Germany
| | - Regina Bleul
- Fraunhofer Institute for Microengineering and Microsystems IMM Carl-Zeiss-Strasse 18–20 55129 Mainz Germany
| | - Raphael Thiermann
- Fraunhofer Institute for Microengineering and Microsystems IMM Carl-Zeiss-Strasse 18–20 55129 Mainz Germany
| | - Peter Höbel
- Fraunhofer Institute for Microengineering and Microsystems IMM Carl-Zeiss-Strasse 18–20 55129 Mainz Germany
| | - Ulrich Krtschil
- Fraunhofer Institute for Microengineering and Microsystems IMM Carl-Zeiss-Strasse 18–20 55129 Mainz Germany
| | - Patrick Löb
- Fraunhofer Institute for Microengineering and Microsystems IMM Carl-Zeiss-Strasse 18–20 55129 Mainz Germany
| | - Michael Maskos
- Fraunhofer Institute for Microengineering and Microsystems IMM Carl-Zeiss-Strasse 18–20 55129 Mainz Germany
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9
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Nguyen SN, Truong TK, You SJ, Wang YF, Cao TM, Pham VV. Investigation on Photocatalytic Removal of NO under Visible Light over Cr-Doped ZnO Nanoparticles. ACS OMEGA 2019; 4:12853-12859. [PMID: 31460411 PMCID: PMC6690566 DOI: 10.1021/acsomega.9b01628] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/03/2019] [Accepted: 07/17/2019] [Indexed: 05/21/2023]
Abstract
Removal of nitrogen oxide pollution has attracted much attention, and photocatalysis is considered as an effective method to treat polluted gas. Currently, modified semiconductors with approximate band gap are used as visible-light-driven photocatalysts. Herein, this is the first investigation of photocatalytic removal of NO under visible light over Cr-doped ZnO nanoparticles (Cr-ZnO NPs). Furthermore, the trapping species experiment and electron spin resonance measurement were conducted to identify the primary reactive factor of the photocatalytic reaction. In this study, Cr-ZnO NPs were synthesized by the sol-gel method with a narrow band gap, enhanced NO photocatalytic degradation performance, low NO2 conversion yield, and high stability under visible light.
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Affiliation(s)
- Son Ngoc Nguyen
- Faculty of Materials
Science and Technology, University of Science,
VNU−HCM, Ho Chi
Minh City 700000, Vietnam
| | - Thao Kim Truong
- Faculty of Materials
Science and Technology, University of Science,
VNU−HCM, Ho Chi
Minh City 700000, Vietnam
| | - Sheng-Jie You
- Department of Environmental Engineering, Chung Yuan Christian University, Taoyuan 32023, Taiwan
| | - Ya-Fen Wang
- Department of Environmental Engineering, Chung Yuan Christian University, Taoyuan 32023, Taiwan
| | - Thi Minh Cao
- Ho Chi Minh City University of Technology (HUTECH), Ho Chi Minh City 700000, Vietnam
| | - Viet Van Pham
- Faculty of Materials
Science and Technology, University of Science,
VNU−HCM, Ho Chi
Minh City 700000, Vietnam
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Abdolmajid E, Kharazi H, Chalaki M, Khojasteh M, Haghighat S, Attar F, Nemati F, Falahati M. Titanium oxide nanoparticles fabrication, hemoglobin interaction, white blood cells cytotoxicity, and antibacterial studies. J Biomol Struct Dyn 2018; 37:3007-3017. [PMID: 30044173 DOI: 10.1080/07391102.2018.1499555] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/09/2023]
Abstract
This study is focused on the fabrication and characterization of titanium oxide (TiO2) NPs. Afterwards; the interaction of TiO2 NPs with human hemoglobin (Hb) was investigated by FTIR spectroscopy, fluorescence spectroscopy, and molecular docking studies. Also, the cytotoxic effect of fabricated TiO2 NPs against human white blood cells (WBCs) was considered by MTT assay. The antibacterial effect of synthesized NPs was examined on Pseudomonas aeruginosa (ATCC 27853); Escherichia coli (ATCC 25922) and Staphylococcus aureus (ATCC 25923). TEM and DLS investigations showed that the synthesized TiO2 NPs have a narrow nano-sized distribution. XRD pattern of the fabricated NPs exhibited that the TiO2 NPs contain anatase phase. Similarity in amide I and II signal intensities showed that secondary structure of the adsorbed Hb is preserved. The intrinsic fluorescence study revealed that the fluorescence quenching of Hb was done by complex formation between Hb and TiO2 NPs trough the hydrogen bond and van der Waals interactions. Synchronous fluorescence spectroscopy determined that interaction of TiO2 NPs with Hb did not unfold the Hb structure in the vicinity of the Tyr and Trp residues. Molecular docking study depicted that Glu-95, Thr-134 and Tyr-140 are involved in the formation of hydrophilic bonds. MTT data and antibacterial assays indicated that TiO2 NPs endow distinguished antibacterial activities against Gram-negative and Gram positive strains at safe concentrations. This study may reveal that fabricated TiO2 NP can be used as a safe and potent antibacterial agent. Communicated by Ramaswamy H. Sarma.
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Affiliation(s)
- Elham Abdolmajid
- a Department of Biotechnology, Faculty of Advance Science and Technology , Pharmaceutical Sciences Branch, Islamic Azad University (IAUPS) , Tehran , Iran
| | - Hasti Kharazi
- b Department of Cellular and Molecular Biology, Faculty of Advance Science and Technology , Pharmaceutical Sciences Branch, Islamic Azad University (IAUPS) , Tehran , Iran
| | - Mahfam Chalaki
- b Department of Cellular and Molecular Biology, Faculty of Advance Science and Technology , Pharmaceutical Sciences Branch, Islamic Azad University (IAUPS) , Tehran , Iran
| | - Marzieh Khojasteh
- b Department of Cellular and Molecular Biology, Faculty of Advance Science and Technology , Pharmaceutical Sciences Branch, Islamic Azad University (IAUPS) , Tehran , Iran
| | - Setareh Haghighat
- c Department of Microbiology, Faculty of Advance Science and Technology , Pharmaceutical Sciences Branch, Islamic Azad University (IAUPS) , Tehran , Iran
| | - Farnoosh Attar
- d Department of Biology, Faculty of Food Industry and Agriculture, Standard Research Institute (SRI) , Karaj , Iran
| | - Fahimeh Nemati
- e Department of Nanotechnology, Faculty of Advance Science and Technology , Pharmaceutical Sciences Branch, Islamic Azad University (IAUPS) , Tehran , Iran
| | - Mojtaba Falahati
- d Department of Biology, Faculty of Food Industry and Agriculture, Standard Research Institute (SRI) , Karaj , Iran
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11
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RETRACTED: Mechanism of bio molecule stabilized selenium nanoparticles against oxidation process and Clostridium Botulinum. Microb Pathog 2018; 115:68-73. [DOI: 10.1016/j.micpath.2017.12.042] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2017] [Revised: 12/11/2017] [Accepted: 12/14/2017] [Indexed: 11/19/2022]
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12
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Three-dimensional imaging of vortex structure in a ferroelectric nanoparticle driven by an electric field. Nat Commun 2017; 8:280. [PMID: 28819262 PMCID: PMC5561144 DOI: 10.1038/s41467-017-00318-9] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2017] [Accepted: 06/21/2017] [Indexed: 11/09/2022] Open
Abstract
Topological defects of spontaneous polarization are extensively studied as templates for unique physical phenomena and in the design of reconfigurable electronic devices. Experimental investigations of the complex topologies of polarization have been limited to surface phenomena, which has restricted the probing of the dynamic volumetric domain morphology in operando. Here, we utilize Bragg coherent diffractive imaging of a single BaTiO3 nanoparticle in a composite polymer/ferroelectric capacitor to study the behavior of a three-dimensional vortex formed due to competing interactions involving ferroelectric domains. Our investigation of the structural phase transitions under the influence of an external electric field shows a mobile vortex core exhibiting a reversible hysteretic transformation path. We also study the toroidal moment of the vortex under the action of the field. Our results open avenues for the study of the structure and evolution of polar vortices and other topological structures in operando in functional materials under cross field configurations. Imaging of topological states of matter such as vortex configurations has generally been limited to 2D surface effects. Here Karpov et al. study the volumetric structure and dynamics of a vortex core mediated by electric-field induced structural phase transition in a ferroelectric BaTiO3 nanoparticle.
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13
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Yu Y, Lopez de la Cruz RA, Kieviet BD, Gojzewski H, Pons A, Julius Vancso G, de Beer S. Pick up, move and release of nanoparticles utilizing co-non-solvency of PNIPAM brushes. NANOSCALE 2017; 9:1670-1675. [PMID: 28084477 DOI: 10.1039/c6nr09245d] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
A critical complication in handling nanoparticles is the formation of large aggregates when particles are dried e.g. when they need to be transferred from one liquid to another. The particles in these aggregates need to disperse into the destined liquid medium, which has been proven difficult due to the relatively large interfacial interaction forces between nanoparticles. We present a simple method to capture, move and release nanoparticles without the formation of large aggregates. To do so, we employ the co-non-solvency effect of poly(N-isopropylacrylamide) (PNIPAM) brushes in water-ethanol mixtures. In pure water or ethanol, the densely end-anchored macromolecules in the PNIPAM brush stretch and absorb the solvent. We show that under these conditions, the adherence between the PNIPAM brush and a silicon oxide, gold, polystyrene or poly(methyl methacrylate) colloid attached to an atomic force microscopy cantilever is low. In contrast, when the PNIPAM brushes are in a collapsed state in a 30-70 vol% ethanol-water mixture, the adhesion between the brush and the different counter surfaces is high. For potential application, we demonstrate that this difference in adhesion can be utilized to pick up, move and release 900 silicon oxide nanoparticles of diameter 80 nm using only 10 × 10 μm2 PNIPAM brush.
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Affiliation(s)
- Yunlong Yu
- Materials Science and Technology of Polymers, MESA+ Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500 AE Enschede, the Netherlands.
| | - Ricardo A Lopez de la Cruz
- Physics of Fluids, MESA+ Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500 AE Enschede, the Netherlands
| | - Bernard D Kieviet
- Materials Science and Technology of Polymers, MESA+ Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500 AE Enschede, the Netherlands.
| | - Hubert Gojzewski
- Materials Science and Technology of Polymers, MESA+ Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500 AE Enschede, the Netherlands.
| | - Adeline Pons
- Physics of Fluids, MESA+ Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500 AE Enschede, the Netherlands
| | - G Julius Vancso
- Materials Science and Technology of Polymers, MESA+ Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500 AE Enschede, the Netherlands.
| | - Sissi de Beer
- Materials Science and Technology of Polymers, MESA+ Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500 AE Enschede, the Netherlands.
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Ma J, Lee SMY, Yi C, Li CW. Controllable synthesis of functional nanoparticles by microfluidic platforms for biomedical applications - a review. LAB ON A CHIP 2017; 17:209-226. [PMID: 27991629 DOI: 10.1039/c6lc01049k] [Citation(s) in RCA: 154] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Nanoparticles have drawn significant attention in biomedicine due to their unique optical, thermal, magnetic and electrical properties which are highly related to their size and morphologies. Recently, microfluidic systems have shown promising potential to modulate critical stages in nanosynthesis, such as nucleation, growth and reaction conditions so that the size, size distribution, morphology, and reproducibility of nanoparticles are optimized in a high throughput manner. In this review, we put an emphasis on a decade of developments of microfluidic systems for engineering nanoparticles in various applications including imaging, biosensing, drug delivery, and theranostic applications.
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Affiliation(s)
- Junping Ma
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macau SAR, China.
| | - Simon Ming-Yuen Lee
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macau SAR, China.
| | - Changqing Yi
- Key Laboratory of Sensing Technology and Biomedical Instruments (Guangdong Province), School of Engineering, Sun Yat-Sen University, Guangzhou, China. and Research Institute of Sun Yat-Sen University in Shenzhen, Shenzhen, China
| | - Cheuk-Wing Li
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macau SAR, China.
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15
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Salari Z, Danafar F, Dabaghi S, Ataei SA. Sustainable synthesis of silver nanoparticles using macroalgae Spirogyra varians and analysis of their antibacterial activity. JOURNAL OF SAUDI CHEMICAL SOCIETY 2016. [DOI: 10.1016/j.jscs.2014.10.004] [Citation(s) in RCA: 79] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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16
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Paik YH, Kojori HS, Kim SJ. Ferroelectric devices using lead zirconate titanate (PZT) nanoparticles. NANOTECHNOLOGY 2016; 27:075204. [PMID: 26788984 DOI: 10.1088/0957-4484/27/7/075204] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
We successfully demonstrate the synthesis of lead zirconate titanate nanoparticles (PZT NPs) and a ferroelectric device using the synthesized PZT NPs. The crystalline structure and the size of the nanocrystals are studied using x-ray diffraction and transmission electron microscopy, respectively. We observe <100 nm of PZT NPs and this result matches dynamic light scattering measurements. A solution-based low-temperature process is used to fabricate PZT NP-based devices on an indium tin oxide substrate. The fabricated ferroelectric devices are characterized using various optical and electrical measurements and we verify ferroelectric properties including ferroelectric hysteresis and the ferroelectric photovoltaic effect. Our approach enables low-temperature solution-based processes that could be used for various applications. To the best of our knowledge, this low-temperature solution processed ferroelectric device using PZT NPs is the first successful demonstration of its kind.
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Affiliation(s)
- Young Hun Paik
- Department of Electrical and Computer Engineering, University of Miami, FL, USA
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17
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Magnetic and dielectric properties on sol–gel combustion synthesis of Pb(Zr0.52,Ti0.43X0.05)O3 (X=Fe, Ni, and Co) nanoparticles. ADV POWDER TECHNOL 2014. [DOI: 10.1016/j.apt.2014.03.011] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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18
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Abstract
In this review, the main concept of ferroelectricity of perovskite oxides and related materials at nanometer scale and existing difficulties in the synthesis of those nanocrystals are discussed. Important effects, such as depolarization field and size effect, on the existence of ferroelectricity in perovskite nanocrystals are deliberated. In the discussion of modeling works, different theoretical calculations are pinpointed focusing on their studies of lattice dynamics, phase transitions, new origin of ferroelectricity in nanostructures, etc. As the major part of this review, recent research progress in the facile synthesis, characterization and various applications of perovskite ferroelectric nanomaterials, such as BaTiO₃, PbTiO₃, PbZrO₃, and BiFeO₃, are also scrutinized. Perspectives concerning the future direction of ferroelectric nanomaterials research and its potential applications in renewable energy, etc., are presented. This review provides an overview in this area and guidance for further studies in perovskite ferroelectric nanomaterials and their applications.
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Affiliation(s)
- Nurxat Nuraje
- Department of Materials Science & Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.
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19
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Maurya D, Petkov V, Kumar A, Priya S. Nanostructured lead-free ferroelectric Na0.5Bi0.5TiO3-BaTiO3 whiskers: synthesis mechanism and structure. Dalton Trans 2012; 41:5643-52. [PMID: 22430816 DOI: 10.1039/c2dt00045h] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Nanostructured lead-free ferroelectric Na(0.5)Bi(0.5)TiO(3)-BaTiO(3) (NBTBT) whiskers with a high aspect ratio were synthesized topochemically using Na(2)Ti(6)O(13) (NTO) as a host structure for the first time. High energy X-ray diffraction coupled with an atomic pair distribution function (PDF) and Raman scattering analyses were used to confirm the average structure of the lead-free NBTBT whiskers, which was found to be rhombohedral, i.e. a ferroelectric enabling type. High resolution transmission electron microscopic (HRTEM) analysis revealed local monoclinic-type structural distortions, indicating a modulated structure at the nanoscale in the morphotropic phase boundary (MPB) composition of the lead-free NBTBT whiskers. The structural rearrangement during the synthesis of the lead-free NBTBT whiskers was found to occur via translation of the edge shared octahedra of NTO into a corner sharing coordination. High temperature morphological changes that depict the disintegration of the isolated whiskers into their individual grains due to the higher grain boundary energy have been found to occur in close analogy with Rayleigh-type instability.
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Affiliation(s)
- Deepam Maurya
- Center for Energy Harvesting Materials and Systems (CEHMS), Bio-Inspired Materials and Devices Laboratory (BMDL), Virginia Tech, Blacksburg, VA 24061, USA.
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20
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Leite ER, Ribeiro C. Classical Crystallization Model: Nucleation and Growth. CRYSTALLIZATION AND GROWTH OF COLLOIDAL NANOCRYSTALS 2012. [DOI: 10.1007/978-1-4614-1308-0_3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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21
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Sultan M, Tahir AA, Mazhar M, Upul Wijayantha KG, Zeller M. Isostructural copper–zinc mixed metal complexes for single source deposition of Cu–ZnO composite thin films. Dalton Trans 2011; 40:7889-97. [DOI: 10.1039/c1dt10560d] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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22
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Khorsand Zak A, Abd. Majid W. Characterization and X-ray peak broadening analysis in PZT nanoparticles prepared by modified sol–gel method. CERAMICS INTERNATIONAL 2010; 36:1905-1910. [DOI: 10.1016/j.ceramint.2010.03.022] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
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23
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Khorasani-Motlagh M, Noroozifar M, Shahroosvand H. A new reduction route for the synthesis of nanoscale metals and metal oxides with ascorbic acid at low temperature. JOURNAL OF THE IRANIAN CHEMICAL SOCIETY 2010. [DOI: 10.1007/bf03246190] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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24
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Rizzuti A, Leonelli C, Corradi A, Caponetti E, Martino DC, Nasillo G, Saladino ML. Structural Characterization of Zirconia Nanoparticles Prepared by Microwave-Hydrothermal Synthesis. J DISPER SCI TECHNOL 2009. [DOI: 10.1080/01932690903123676] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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25
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Osaka T, Iida H, Tominaka S, Hachisu T. New Trends in Nanoparticles: Syntheses and Their Applications to Fuel Cells, Health Care, and Magnetic Storage. Isr J Chem 2008. [DOI: 10.1560/ijc.48.3-4.333] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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26
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Algueró M, Hungría T, Amorín H, Ricote J, Galy J, Castro A. Relaxor behavior, polarization buildup, and switching in nanostructured 0.92 PbZn1/3Nb2/3O3-0.08 PbTiO3 ceramics. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2007; 3:1906-1911. [PMID: 17935067 DOI: 10.1002/smll.200700284] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
The relaxor-type behavior, electrical polarization buildup, and switching in 0.92Pb(Zn(1/3)Nb(2/3))O(3)-0.08PbTiO(3) nanostructured ceramics with a grain size of approximately 20 nm is reported for the first time. This composition presents the highest-known piezoelectric coefficients, yet phase stability is an issue. Ceramics can only be obtained by the combination of mechanosynthesis and spark-plasma sintering. The results raise the possibility of using nanoscale, perovskite-relaxor-based morphotropic-phase-boundary materials for sensing and actuation in nanoelectromechanical systems.
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Affiliation(s)
- Miguel Algueró
- Instituto de Ciencia de Materiales de Madrid (ICMM), Cantoblanco, 28049 Madrid, Spain.
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27
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Zhong Z. Synthesis of Mo[sup 4+] Substituted Spinel Li[sub 4]Ti[sub 5−x]Mo[sub x]O[sub 12]. ACTA ACUST UNITED AC 2007. [DOI: 10.1149/1.2784142] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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28
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29
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Zeng HC. Synthetic architecture of interior space for inorganic nanostructures. ACTA ACUST UNITED AC 2006. [DOI: 10.1039/b511296f] [Citation(s) in RCA: 436] [Impact Index Per Article: 24.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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30
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Mao Y, Park TJ, Wong SS. Synthesis of classes of ternary metal oxide nanostructures. Chem Commun (Camb) 2005:5721-35. [PMID: 16307128 DOI: 10.1039/b509960a] [Citation(s) in RCA: 148] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Nanoscale structures, such as nanoparticles, nanorods, nanowires, nanocubes, and nanotubes, have attracted extensive synthetic attention as a result of their novel size-dependent properties. Ideally, the net result of nanoscale synthesis is the production of structures that achieve monodispersity, stability, and crystallinity with a predictable morphology. Many of the synthetic methods used to attain these goals have been based on principles derived from semiconductor technology, solid state chemistry, and molecular inorganic cluster chemistry. We describe a number of advances that have been made in the reproducible synthesis of various ternary oxide nanomaterials, including alkaline earth metal titanates, alkali metal titanates, bismuth ferrites, ABO(4)-type oxides, as well as miscellaneous classes of ternary metal oxides.
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Affiliation(s)
- Yuanbing Mao
- Department of Chemistry, State University of New York at Stony Brook, 11794, USA
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31
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32
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Orhan E, Pontes FM, Leite ER, Pizani PS, Varela JA, Longo E. Experimental and Theoretical Investigation of the Room-Temperature Photoluminescence of Amorphized Pb(Zr,Ti)O3. Chemphyschem 2005; 6:1530-6. [PMID: 16035024 DOI: 10.1002/cphc.200500030] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Ultrafine PbZr0.20Ti0.80O3 was amorphized through high-energy mechanical milling. The structural evolution through the amorphization process was accompanied by various characterization techniques, such as X-ray diffraction, Fourier-transformed IR spectroscopy (FTIR), high-resolution transmission electron microscopy (HR-TEM), and Raman spectroscopy. A strong photoluminescence was measured at room temperature for amorphized PbZr0.20Ti0.80O3, and interpreted by means of high-level quantum mechanical calculations in the density functional theory framework. Three periodic models were used to represent the crystalline and amorphized PbZr0.20Ti0.80O3, and they allowed the calculation of electronic properties that are consistent with the experimental data and that explain the appearance of photoluminescence.
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Affiliation(s)
- Emmanuelle Orhan
- Instituto de Química, Universidade Estadual Paulista, 14801-907 Araraquara, SP, Brazil.
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33
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Yan T, Shen ZG, Chen JF, Liu XL, Tao X, Yun J. Synthesis of Well-isolated Barium Titanium Trioxide Nanocubes. CHEM LETT 2005. [DOI: 10.1246/cl.2005.1196] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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34
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Matsui I. Nanoparticles for Electronic Device Applications: A Brief Review. JOURNAL OF CHEMICAL ENGINEERING OF JAPAN 2005. [DOI: 10.1252/jcej.38.535] [Citation(s) in RCA: 126] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Isao Matsui
- Japan Chemical Innovation Institute
- Toshiba Corporate Research & Development Center
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35
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Carretti E, Dei L, Macherelli A, Weiss RG. Rheoreversible polymeric organogels: the art of science for art conservation. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2004; 20:8414-8418. [PMID: 15379453 DOI: 10.1021/la0495175] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
A new category of gels where gelification and breaking of the gels are chemically induced is presented. In particular, the latent gellant polyallylamine produced stable gels with some organic solvents after reaction with CO2 at room temperature, giving the gellant polyallylammonium carbamate. The rheological behavior switches from solution-type to gel-type. After weak acid-catalyzed displacement of CO2, the gel character disappears in a few seconds, making these polymeric organogels rheoreversible by a simple chemical action. This "intelligent" chemical switch between solution-type and gel-type rheological behavior has been exploited to clean pictorial surfaces in art conservation. In fact, during the cleaning procedure, there is a need for the gel supporting the cleaning solvent to have a very high viscosity. After cleaning has been successful, there is a strong necessity to reduce the viscosity, to better eliminate traces of the gellant that must be completely removed from the work of art. In the present study, we show that the art of science, in the sense of designing new physicochemical systems exploiting the "science palette", can lead to an improvement in the techniques used to protect and conserve the results of the "artists' palette".
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36
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He Y, Zhu Y. Solvothermal Synthesis of Sodium and Potassium Tantalate Perovskite Nanocubes. CHEM LETT 2004. [DOI: 10.1246/cl.2004.900] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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37
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Shahid N, Barron AR. Solvent free synthesis of carboxylate–alumoxane nanoparticles using mechanical shear. ACTA ACUST UNITED AC 2004. [DOI: 10.1039/b401363h] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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38
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Fu H, Bellaiche L. Ferroelectricity in barium titanate quantum dots and wires. PHYSICAL REVIEW LETTERS 2003; 91:257601. [PMID: 14754156 DOI: 10.1103/physrevlett.91.257601] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2003] [Indexed: 05/24/2023]
Abstract
Properties of BaTiO3 colloidal quantum dots and wires are simulated using a first-principles-based approach. Large atomic off-center displacements (that are robust against capping matrix materials) are found to exist in very small (<5 nm) dots. We further determine the size dependences of electrical and electromechanical responses in the studied nanostructures, as well as provide microscopic understanding of these responses.
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Affiliation(s)
- Huaxiang Fu
- Department of Physics, University of Arkansas, Fayetteville, Arkansas 72701, USA
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39
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Mao Y, Banerjee S, Wong SS. Large-Scale Synthesis of Single-Crystalline Perovskite Nanostructures. J Am Chem Soc 2003; 125:15718-9. [PMID: 14677942 DOI: 10.1021/ja038192w] [Citation(s) in RCA: 268] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Single-crystalline perovskite nanostructures with reproducible shape have been prepared using a simple, readily scaleable solid-state reaction in the presence of NaCl and a nonionic surfactant. Pristine BaTiO3 nanowires have diameters ranging from 50 to 80 nm with an aspect ratio larger than 25. Single-crystalline SrTiO3 nanocubes with a mean edge length of 80 nm have been produced using a similar procedure.
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Affiliation(s)
- Yuanbing Mao
- Department of Chemistry, State University of New York at Stony Brook, Stony Brook, New York 11794-3400, USA
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40
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Fan J, Lu J, Xu R, Jiang R, Gao Y. Use of water-dispersible Fe(2)O(3) nanoparticles with narrow size distributions in isolating avidin. J Colloid Interface Sci 2003; 266:215-8. [PMID: 12957602 DOI: 10.1016/s0021-9797(03)00570-8] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Synthetic approaches that vigorously control the microstructures of water-dispersible gamma-Fe(2)O(3) nanoparticles such as size and size uniformity are of importance to the potential biological applications of these nanomaterials. In the present paper, water-dispersible gamma-Fe(2)O(3) nanocrystals with narrow size distributions (bipy-Fe(2)O(3)) were prepared via a site-exchange reaction. These particular materials are superparamagnetic and stable within a wide range of pH. Introduction of the biotin functionality onto the surfaces of bipy-Fe(2)O(3) enabled the affinity isolation of the protein avidin from its incubation solution magnetically with 96% efficiency.
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Affiliation(s)
- Jinda Fan
- Department of Chemistry and Biochemistry, Southern Illinois University, Carbondale, IL 62901-4409, USA
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41
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Joo J, Yu T, Kim YW, Park HM, Wu F, Zhang JZ, Hyeon T. Multigram scale synthesis and characterization of monodisperse tetragonal zirconia nanocrystals. J Am Chem Soc 2003; 125:6553-7. [PMID: 12785795 DOI: 10.1021/ja034258b] [Citation(s) in RCA: 339] [Impact Index Per Article: 16.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A new and simple method has been developed to synthesize large quantities of highly monodisperse tetragonal zirconia nanocrystals. In this synthesis, a nonhydrolytic sol-gel reaction between zirconium(IV) isopropoxide and zirconium(IV) chloride at 340 degrees C generated 4 nm sized zirconia nanoparticles. A high-resolution transmission electron microscopic (HRTEM) image showed that the particles have a uniform particle size distribution and that they are highly crystalline. These monodisperse nanoparticles were synthesized without any size selection process. X-ray diffraction studies combined with Rietveld refinement revealed that the ZrO(2) nanocrystals are the high-temperature tetragonal phase, and very close to a cubic phase. When zirconium(IV) bromide is used as a precursor instead of zirconium chloride, zirconia nanoparticles with an average size of 2.9 nm were obtained. The UV-visible absorption spectrum of 4 nm sized zirconia nanoparticles exhibited a strong absorption starting at around 270 nm. A fluorescence spectrum with excitation at 300 nm showed a broad fluorescence band centered around 370 nm. FTIR spectra showed indication of TOPO binding on the ZrO(2) nanoparticle surface. These optical studies also suggest that the nanoparticles are of high quality in terms of narrow particle size distribution and relatively low density of surface trap states.
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Affiliation(s)
- Jin Joo
- Contribution from the National Creative Research Initiative Center for Oxide Nanocrystalline Materials and School of Chemical Engineering, Seoul National University, Seoul 151-744, Korea
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42
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Lou XW, Zeng HC. Complex alpha-MoO(3) nanostructures with external bonding capacity for self-assembly. J Am Chem Soc 2003; 125:2697-704. [PMID: 12603157 DOI: 10.1021/ja029086h] [Citation(s) in RCA: 189] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Through manipulating crystal growth directions, we devised a versatile synthetic method to fabricate complex alpha-MoO(3) nanostructures with external bonding capacity for self-organization. Using four-armed forklike alpha-MoO(3) as nanobuilding blocks, we assembled more complex crystal morphologies, such as centrally holed nanorods, tridents, and paintbrushes. With prolonged ultrasonic treatments, pristine forklike alpha-MoO(3) crystals can be turned into less armed nanostructures, giving away the secondary arms (width < 100 nm) at the same time. On the other hand, the resultant alpha-MoO(3) itself can act as a template to produce shaped TiO(2) and other nanocrystals. Square- and horseshoe-shaped nanocrystals of anatase TiO(2) are left undissolved after removing alpha-MoO(3) templates in basic medium.
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Affiliation(s)
- Xiong Wen Lou
- Department of Chemical and Environmental Engineering, Faculty of Engineering, National University of Singapore, 10 Kent Ridge Crescent, Singapore 119260
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43
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Lu J, Fan J, Xu R, Roy S, Ali N, Gao Y. Synthesis of alkyl sulfonate/alcohol-protected gamma-Fe(2)O(3) nanocrystals with narrow size distributions. J Colloid Interface Sci 2003; 258:427-31. [PMID: 12618115 DOI: 10.1016/s0021-9797(02)00152-2] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Highly crystalline gamma-Fe(2)O(3) nanoparticles with narrow size distributions that are coated with 1-undecanesulfonic acid were synthesized via two distinct approaches using oxidation and site-exchange reactions. However, similar nanocrystals protected with 1-octanol could only be achieved via the site-exchange method, while the oxidation approach led to Fe(2)O(3) nanoparticles of poor crystallinity and size uniformity. Our magnetization measurements confirmed the superparamagnetic nature of our Fe(2)O(3) nanoparticle products and the effects of the coating materials on magnetization properties.
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Affiliation(s)
- Junge Lu
- Department of Chemistry and Biochemistry, Southern Illinois University, Carbondale, IL 62901-4409, USA
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44
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Nelson JA, Wagner MJ. Synthesis of sodium tantalate nanorods by alkalide reduction. J Am Chem Soc 2003; 125:332-3. [PMID: 12517135 DOI: 10.1021/ja028125m] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
NaTaO3 nanorods were synthesized with high (>90%) yield by reduction of TaCl5 with THF solutions of the alkalide K+(15C5)2Na-, followed by product annealing under dynamic vacuum at 250 and 600 degrees C. In addition to the nanorods, the product is comprised of 5-10% approximately 10-nm diameter spheroidal NaTaO3 nanocrystals. The nanorods are generally longer than 500 nm, with some exceeding 1 mum, and 10-100 nm wide, with aspect ratios that vary between 10 and 20:1. Select area electron diffraction patterns of individual nanorods indicate that each nanorod is a single crystal with its axis oriented in the [010] direction.
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Affiliation(s)
- Jennifer A Nelson
- Department of Chemistry, The George Washington University, 725 21st Street NW, Washington, DC 20052, USA
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45
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Xu R, Zeng HC. Mechanistic Investigation on Salt-Mediated Formation of Free-Standing Co3O4Nanocubes at 95 °C. J Phys Chem B 2003. [DOI: 10.1021/jp021094x] [Citation(s) in RCA: 139] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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46
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Urban JJ, Yun WS, Gu Q, Park H. Synthesis of single-crystalline perovskite nanorods composed of barium titanate and strontium titanate. J Am Chem Soc 2002; 124:1186-7. [PMID: 11841284 DOI: 10.1021/ja017694b] [Citation(s) in RCA: 136] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We report the solution-based synthesis of single-crystalline nanorods composed of barium titanate (BaTiO3) and strontium titanate (SrTiO3), which yields well-isolated nanorods with diameters ranging from 5 to 60 nm and lengths reaching up to >10 mum. Electron microscopy and diffraction measurements show that these nanorods are composed of single-crystalline cubic perovskite BaTiO3 and SrTiO3 with a principal axis of the unit cell preferentially aligned along the wire length. These BaTiO3 and SrTiO3 nanorods should provide promising materials for fundamental investigations on nanoscale ferroelectricity, piezoelectricity, and paraelectricity.
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Affiliation(s)
- Jeffrey J Urban
- Department of Chemistry and Chemical Biology, Harvard University, 12 Oxford Street, Cambridge, Massachusetts 02138, USA
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Hyeon T, Lee SS, Park J, Chung Y, Na HB. Synthesis of highly crystalline and monodisperse maghemite nanocrystallites without a size-selection process. J Am Chem Soc 2001; 123:12798-801. [PMID: 11749537 DOI: 10.1021/ja016812s] [Citation(s) in RCA: 1014] [Impact Index Per Article: 44.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
The synthesis of highly crystalline and monodisperse gamma-Fe(2)O(3) nanocrystallites is reported. High-temperature (300 degrees C) aging of iron-oleic acid metal complex, which was prepared by the thermal decomposition of iron pentacarbonyl in the presence of oleic acid at 100 degrees C, was found to generate monodisperse iron nanoparticles. The resulting iron nanoparticles were transformed to monodisperse gamma-Fe(2)O(3) nanocrystallites by controlled oxidation by using trimethylamine oxide as a mild oxidant. Particle size can be varied from 4 to 16 nm by controlling the experimental parameters. Transmission electron microscopic images of the particles showed 2-dimensional and 3-dimensional assembly of particles, demonstrating the uniformity of these nanoparticles. Electron diffraction, X-ray diffraction, and high-resolution transmission electron microscopic (TEM) images of the nanoparticles showed the highly crystalline nature of the gamma-Fe(2)O(3) structures. Monodisperse gamma-Fe(2)O(3) nanocrystallites with a particle size of 13 nm also can be generated from the direct oxidation of iron pentacarbonyl in the presence of oleic acid with trimethylamine oxide as an oxidant.
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Affiliation(s)
- T Hyeon
- School of Chemical Engineering and Institute of Chemical Processes, Seoul National University, Seoul 151-744, Korea
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Li G, Smith RL, Inomata H. Synthesis of nanoscale Ce(1-x)Fe(x)O(2) solid solutions via a low-temperature approach. J Am Chem Soc 2001; 123:11091-2. [PMID: 11686726 DOI: 10.1021/ja016502+] [Citation(s) in RCA: 137] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- G Li
- Research Center of Supercritical Fluid Technology, Department of Chemical Engineering, Tohoku University, Sendai 980-8579, Japan
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