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Cabral L, Leite ER, Longo E, San-Miguel MA, da Silva EZ, Andrés J. Disentangling the Effects of Laser and Electron Irradiation on AgX (X = Cl, Br, and I): Insights from Quantum Chemical Calculations. NANO LETTERS 2024; 24:3021-3027. [PMID: 38252876 DOI: 10.1021/acs.nanolett.3c04130] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/24/2024]
Abstract
The effects on the lattice structure and electronic properties of different polymorphs of silver halide, AgX (X = Cl, Br, and I), induced by laser irradiation (LI) and electron irradiation (EI) are investigated using a first-principles approach, based on the electronic temperature (Te) within a two-temperature model (TTM) and by increasing the total number of electrons (Ne), respectively. Ab initio molecular dynamics (AIMD) simulations provide a clear visualization of how Te and Ne induce a structural and electronic transformation process during LI/EI. Our results reveal the diffusion processes of Ag and X ions, the amorphization of the AgX lattices, and a straightforward interpretation of the time evolution for the formation of Ag and X nanoclusters under high values of Te and Ne. Overall, the present work provides fine details of the underlying mechanism of LI/EI and promises to be a powerful toolbox for further cross-scale modeling of other semiconductors.
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Affiliation(s)
- Luis Cabral
- Institute of Physics Gleb Wataghin (IFGW), Universidade Estadual de Campinas, Campinas, 13083-859 SP, Brazil
- Department of Physical and Analytical Chemistry, University Jaume I (UJI), Castelló 12071, Spain
| | - Edson R Leite
- Laboratório Nacional de Nanotecnologia (LNNano), CNPEM, Campinas, 13083-970 SP, Brazil
- LIEC-CDMF, Department of Chemistry, Universidade Federal de São Carlos, São Carlos, 13565-905 SP, Brazil
| | - Elson Longo
- LIEC-CDMF, Department of Chemistry, Universidade Federal de São Carlos, São Carlos, 13565-905 SP, Brazil
| | - Miguel A San-Miguel
- Department of Physical-Chemistry, Institute of Chemistry, Universidade Estadual de Campinas, Campinas, 13083-970 SP, Brazil
| | - Edison Z da Silva
- Institute of Physics Gleb Wataghin (IFGW), Universidade Estadual de Campinas, Campinas, 13083-859 SP, Brazil
| | - Juan Andrés
- Laboratório Nacional de Nanotecnologia (LNNano), CNPEM, Campinas, 13083-970 SP, Brazil
- Department of Physical and Analytical Chemistry, University Jaume I (UJI), Castelló 12071, Spain
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2
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Gouveia AF, Lemos SCS, Leite ER, Longo E, Andrés J. Back to the Basics: Probing the Role of Surfaces in the Experimentally Observed Morphological Evolution of ZnO. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:978. [PMID: 36985873 PMCID: PMC10057894 DOI: 10.3390/nano13060978] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/31/2023] [Revised: 02/27/2023] [Accepted: 03/03/2023] [Indexed: 06/18/2023]
Abstract
Although the physics and chemistry of materials are driven by exposed surfaces in the morphology, they are fleeting, making them inherently challenging to study experimentally. The rational design of their morphology and delivery in a synthesis process remains complex because of the numerous kinetic parameters that involve the effective shocks of atoms or clusters, which end up leading to the formation of different morphologies. Herein, we combined functional density theory calculations of the surface energies of ZnO and the Wulff construction to develop a simple computational model capable of predicting its available morphologies in an attempt to guide the search for images obtained by field-emission scanning electron microscopy (FE-SEM). The figures in this morphology map agree with the experimental FE-SEM images. The mechanism of this computational model is as follows: when the model is used, a reaction pathway is designed to find a given morphology and the ideal step height in the whole morphology map in the practical experiment. This concept article provides a practical tool to understand, at the atomic level, the routes for the morphological evolution observed in experiments as well as their correlation with changes in the properties of materials based solely on theoretical calculations. The findings presented herein not only explain the occurrence of changes during the synthesis (with targeted reaction characteristics that underpin an essential structure-function relationship) but also offer deep insights into how to enhance the efficiency of other metal-oxide-based materials via matching.
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Affiliation(s)
- Amanda F. Gouveia
- Department of Analytical and Physical Chemistry, Jaume I University (UJI), 12071 Castelló, Spain
- Brazilian Nanotechnology National Laboratory (LNNano), CNPEM, Campinas 13083-970, SP, Brazil
| | - Samantha C. S. Lemos
- Department of Analytical and Physical Chemistry, Jaume I University (UJI), 12071 Castelló, Spain
| | - Edson R. Leite
- Brazilian Nanotechnology National Laboratory (LNNano), CNPEM, Campinas 13083-970, SP, Brazil
| | - Elson Longo
- Center for the Development of Functional Materials (CDMF), Federal University of São Carlos, São Carlos 13565-905, SP, Brazil
| | - Juan Andrés
- Department of Analytical and Physical Chemistry, Jaume I University (UJI), 12071 Castelló, Spain
- Brazilian Nanotechnology National Laboratory (LNNano), CNPEM, Campinas 13083-970, SP, Brazil
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3
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Abstract
Nucleation and growth are critical steps in crystallization, which plays an important role in determining crystal structure, size, morphology, and purity. Therefore, understanding the mechanisms of nucleation and growth is crucial to realize the controllable fabrication of crystalline products with desired and reproducible properties. Based on classical models, the initial crystal nucleus is formed by the spontaneous aggregation of ions, atoms, or molecules, and crystal growth is dependent on the monomer's diffusion and the surface reaction. Recently, numerous in situ investigations on crystallization dynamics have uncovered the existence of nonclassical mechanisms. This review provides a summary and highlights the in situ studies of crystal nucleation and growth, with a particular emphasis on the state-of-the-art research progress since the year 2016, and includes technological advances, atomic-scale observations, substrate- and temperature-dependent nucleation and growth, and the progress achieved in the various materials: metals, alloys, metallic compounds, colloids, and proteins. Finally, the forthcoming opportunities and challenges in this fascinating field are discussed.
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Affiliation(s)
- Junjie Li
- Key Laboratory of Functional Materials and Devices for Special Environments, Xinjiang Technical Institute of Physics & Chemistry, Chinese Academy of Sciences, Xinjiang Key Laboratory of Electronic Information Materials and Devices, 40-1 South Beijing Road, Urumqi830011, China.,Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing100049, China
| | - Francis Leonard Deepak
- Nanostructured Materials Group, International Iberian Nanotechnology Laboratory (INL), Av. Mestre Jose Veiga, 4715-330Braga, Portugal
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4
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A diagnosis approach for semiconductor properties evaluation from ab initio calculations: Ag-based materials investigation. J SOLID STATE CHEM 2022. [DOI: 10.1016/j.jssc.2021.122670] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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5
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Alvarez-Roca R, Gouveia AF, de Foggi CC, Lemos PS, Gracia L, da Silva LF, Vergani CE, San-Miguel M, Longo E, Andrés J. Selective Synthesis of α-, β-, and γ-Ag 2WO 4 Polymorphs: Promising Platforms for Photocatalytic and Antibacterial Materials. Inorg Chem 2021; 60:1062-1079. [PMID: 33372756 DOI: 10.1021/acs.inorgchem.0c03186] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Silver tungstate (Ag2WO4) shows structural polymorphism with different crystalline phases, namely, orthorhombic, hexagonal, and cubic structures that are commonly known as α, β, and γ, respectively. In this work, these Ag2WO4 polymorphs were selectively and successfully synthesized through a simple precipitation route at ambient temperature. The polymorph-controlled synthesis was conducted by means of the volumetric ratios of the silver nitrate/tungstate sodium dehydrate precursors in solution. The structural and electronic properties of the as-synthesized Ag2WO4 polymorphs were investigated by using a combination of X-ray diffraction and Rietveld refinements, X-ray absorption spectroscopy, X-ray absorption near-edge structure spectroscopy, field-emission scanning electron microscopy images, and photoluminescence. To complement and rationalize the experimental results, first-principles calculations, at the density functional theory level, were carried out, leading to an unprecedented glimpse into the atomic-level properties of the morphology and the exposed surfaces of Ag2WO4 polymorphs. Following the analysis of the local coordination of Ag and W cations (clusters) at each exposed surface of the three polymorphs, the structure-property relationship between the morphology and the photocatalytic and antibacterial activities against amiloride degradation under ultraviolet light irradiation and methicillin-resistant Staphylococcus aureus, respectively, was investigated. A possible mechanism of the photocatalytic and antibacterial activity as well the formation process and growth of the polymorphs is also explored and proposed.
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Affiliation(s)
| | - Amanda Fernandes Gouveia
- Institute of Chemistry, State University of Campinas, Unicamp, 13083-970 Campinas, SP Brazil.,Department of Physical and Analytical Chemistry, Jaume I University, 12071 Castelló de la Plana, Spain
| | | | | | - Lourdes Gracia
- Department of Physical and Analytical Chemistry, Jaume I University, 12071 Castelló de la Plana, Spain
| | | | | | - Miguel San-Miguel
- Institute of Chemistry, State University of Campinas, Unicamp, 13083-970 Campinas, SP Brazil
| | | | - Juan Andrés
- Department of Physical and Analytical Chemistry, Jaume I University, 12071 Castelló de la Plana, Spain
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6
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Huang J, Li D, Liu Y, Li R, Chen P, Liu H, Lv W, Liu G, Feng Y. Ultrathin Ag 2WO 4-coated P-doped g-C 3N 4 nanosheets with remarkable photocatalytic performance for indomethacin degradation. JOURNAL OF HAZARDOUS MATERIALS 2020; 392:122355. [PMID: 32105960 DOI: 10.1016/j.jhazmat.2020.122355] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/10/2019] [Revised: 02/17/2020] [Accepted: 02/18/2020] [Indexed: 06/10/2023]
Abstract
As a metal-free photocatalyst, the photocatalytic activity of graphitic carbon nitride (g-C3N4) remains restricted due to an insufficient visible-light absorption capacity, the rapid recombination of photoinduced carriers, and low surface area. Consequently, P-doped g-C3N4 (PCN) was successfully prepared via a single -step thermal polymerization technique using phytic acid biomass and urea, which exhibited remarkable photocatalytic activity for the degradation of indometacin (IDM). The IDM degradation rate was 7.1 times greater than that of pristine g-C3N4 (CN). Furthermore, Ag2WO4 was loaded onto the surface of the PCN, which formed a Z-scheme heterostructure that promoted the separation of photogenerated carriers. According to analyses of the chemical binding states of PCN, P atoms replaced carbon atoms in the CN framework. According to electron localization function analysis, the low ELF values of P-N facilitated the transfer of photoelectrons. The results of active species scavenging experiments confirmed that superoxide radicals were the primary active species in the photocatalytic degradation system. Finally, the photocatalytic degradation pathways of IDM were predicted through the identification of by-products and IDM reaction sites.
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Affiliation(s)
- Jiaxing Huang
- School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou, 510006, China
| | - Daguang Li
- School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou, 510006, China
| | - Yang Liu
- Faculty of Environmental & Biological Engineering, Guangdong University of Petrochemical Technology, Maoming, 525000, China
| | - Ruobai Li
- School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou, 510006, China
| | - Ping Chen
- School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou, 510006, China
| | - Haijin Liu
- School of Environment, Henan Normal University, Key Laboratory for Yellow River and Huaihe River Water Environment and Pollution Control, Xinxiang, 453007, China
| | - Wenying Lv
- School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou, 510006, China.
| | - Guoguang Liu
- School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou, 510006, China.
| | - Yiping Feng
- School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou, 510006, China
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7
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Paulo de Campos da Costa J, Assis M, Teodoro V, Rodrigues A, Cristina de Foggi C, San-Miguel MA, Pereira do Carmo JP, Andrés J, Longo E. Electron beam irradiation for the formation of thick Ag film on Ag 3PO 4. RSC Adv 2020; 10:21745-21753. [PMID: 35516617 PMCID: PMC9054597 DOI: 10.1039/d0ra03179h] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2020] [Accepted: 05/30/2020] [Indexed: 11/21/2022] Open
Abstract
This study demonstrates that the electron beam irradiation of materials, typically used in characterization measurements, could be employed for advanced fabrication, modification, and functionalization of composites. We developed irradiation equipment using an electron beam irradiation source to be applied in materials modification. Using this equipment, the formation of a thick Ag film on the Ag3PO4 semiconductor is carried out by electron beam irradiation for the first time. This is confirmed by various experimental techniques (X-ray diffraction, field-emission scanning electron microscopy, Raman spectroscopy, and X-ray photoelectron spectroscopy) and ab initio molecular dynamics simulations. Our calculations demonstrate that, at the earlier stages, metallic Ag growth is initiated preferentially at the (110) surface, with the reduction of surface Ag cations forming metallic Ag clusters. As the (100) and (111) surfaces have smaller numbers of exposed Ag cations, the reductions on these surfaces are slower and are accompanied by the formation of O2 molecules. This study demonstrates that the electron beam irradiation of materials, typically used in characterization measurements, could be employed for advanced fabrication, modification, and functionalization of composites.![]()
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Affiliation(s)
- João Paulo de Campos da Costa
- Department of Electrical Engineering (SEL), University of São Paulo (USP) 13566-590 São Carlos Brazil.,Department of Chemistry, INCTMN, CDMF, Federal University of São Carlos (UFSCar) 13565-905 São Carlos Brazil
| | - Marcelo Assis
- Department of Chemistry, INCTMN, CDMF, Federal University of São Carlos (UFSCar) 13565-905 São Carlos Brazil
| | - Vinícius Teodoro
- Department of Chemistry, INCTMN, CDMF, Federal University of São Carlos (UFSCar) 13565-905 São Carlos Brazil
| | - Andre Rodrigues
- Department of Physical Chemistry, Institute of Chemistry, State University of Campinas-(UNICAMP) 13083-970 Campinas São Paulo Brazil
| | - Camila Cristina de Foggi
- Department of Chemistry, INCTMN, CDMF, Federal University of São Carlos (UFSCar) 13565-905 São Carlos Brazil
| | - Miguel Angel San-Miguel
- Department of Physical Chemistry, Institute of Chemistry, State University of Campinas-(UNICAMP) 13083-970 Campinas São Paulo Brazil
| | - João Paulo Pereira do Carmo
- Department of Electrical Engineering (SEL), University of São Paulo (USP) 13566-590 São Carlos Brazil.,R&D Centre MicroElectroMechanics (CMEMS), University of Minho Campus Azurem 4800-052 Guimaraes Portugal
| | - Juan Andrés
- Department of Analytical and Physical Chemistry, University Jaume I (UJI) Castelló 12071 Spain
| | - Elson Longo
- Department of Chemistry, INCTMN, CDMF, Federal University of São Carlos (UFSCar) 13565-905 São Carlos Brazil
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8
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Assis M, Pontes Ribeiro RA, Carvalho MH, Teixeira MM, Gobato YG, Prando GA, Mendonça CR, de Boni L, Aparecido de Oliveira AJ, Bettini J, Andrés J, Longo E. Unconventional Magnetization Generated from Electron Beam and Femtosecond Irradiation on α-Ag 2WO 4: A Quantum Chemical Investigation. ACS OMEGA 2020; 5:10052-10067. [PMID: 32391493 PMCID: PMC7203983 DOI: 10.1021/acsomega.0c00542] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/07/2020] [Accepted: 04/13/2020] [Indexed: 05/29/2023]
Abstract
Novel magnetic metals and metal oxides that use both the spin and charge of an electron offer exciting technological applications. Their discovery could boost research on functional nanoscale materials. Here, for the first time, we report the magnetization of α-Ag2WO4 under electron beam and femtosecond laser irradiation. The formation and growth of silver oxides (AgO, Ag2O, and Ag3O4) and Ag nanofilaments can be observed on the surface of α-Ag2WO4 crystals. These features were also present in the composition of an extruded material and could open new avenues for surface magnetism studies. In order to understand these results, we used first-principles density functional theory calculations. This allowed us to investigate several potential scenarios for controlling magnetic properties. The effect of electron addition on the crystalline structures of α-Ag2WO4, Ag3O4, Ag2O, and AgO has been analyzed in detail. The creation of Ag and O vacancies on these compounds was also analyzed. Based on structural and electronic changes at the local coordination site of Ag, a mechanism was proposed. The mechanism illustrates the processes responsible for the formation and growth of metallic Ag and the magnetic response to electron beam irradiation.
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Affiliation(s)
- Marcelo Assis
- CDMF,
LIEC, Chemistry Department, Federal University
of São Carlos—(UFSCar), P.O. Box 676, 13565-905 São
Carlos, São Paulo, Brazil
| | - Renan Augusto Pontes Ribeiro
- CDMF,
LIEC, Chemistry Department, Federal University
of São Carlos—(UFSCar), P.O. Box 676, 13565-905 São
Carlos, São Paulo, Brazil
| | - Maria Helena Carvalho
- Physics
Department, Federal University of São
Carlos—(UFSCar), P.O. Box 676, 13565-905 São Carlos, São Paulo, Brazil
| | - Mayara Mondego Teixeira
- CDMF,
LIEC, Chemistry Department, Federal University
of São Carlos—(UFSCar), P.O. Box 676, 13565-905 São
Carlos, São Paulo, Brazil
| | - Yara Galvão Gobato
- Physics
Department, Federal University of São
Carlos—(UFSCar), P.O. Box 676, 13565-905 São Carlos, São Paulo, Brazil
| | - Gabriela Augusta Prando
- Physics
Department, Federal University of São
Carlos—(UFSCar), P.O. Box 676, 13565-905 São Carlos, São Paulo, Brazil
| | - Cleber Renato Mendonça
- IFSC—Instituto
de Física de São Carlos, Universidade
de São Paulo—(USP), 13566-590 São Carlos, São Paulo, Brazil
| | - Leonardo de Boni
- IFSC—Instituto
de Física de São Carlos, Universidade
de São Paulo—(USP), 13566-590 São Carlos, São Paulo, Brazil
| | | | - Jefferson Bettini
- Brazilian
Nanotechnology National Laboratory (LNNano), Rua Giuseppe Maximo Scolfa no 10000, BR-13083100 Campinas, São Paulo, Brazil
| | - Juan Andrés
- Department
of Analytical and Physical Chemistry, University
Jaume I (UJI), 12071 Castelló, Spain
| | - Elson Longo
- CDMF,
LIEC, Chemistry Department, Federal University
of São Carlos—(UFSCar), P.O. Box 676, 13565-905 São
Carlos, São Paulo, Brazil
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9
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Li J, Leonard Deepak F. In situ generation of sub-10 nm silver nanowires under electron beam irradiation in a TEM. Chem Commun (Camb) 2020; 56:4765-4768. [PMID: 32253398 DOI: 10.1039/d0cc00909a] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Here, we report a facile irradiation-assisted route to fabricate sub-10 nm Ag nanowires from oxide supports using a TEM. The obtained Ag nanowires show a tunable length/diameter aspect ratio with a minimum diameter of about 9.5 nm. Moreover, the nucleation and growth dynamics of Ag nanowires were uncovered from TEM observations.
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Affiliation(s)
- Junjie Li
- CAS Key Laboratory of Functional Materials and Devices for Special Environments, Xinjiang Technical Institute of Physics & Chemistry, CAS, Xinjiang Key Laboratory of Electronic Information Materials and Devices, 40-1 South Beijing Road, Urumqi 830011, China.
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10
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Assis M, Groppo Filho FC, Pimentel DS, Robeldo T, Gouveia AF, Castro TFD, Fukushima HCS, Foggi CC, Costa JPC, Borra RC, Andrés J, Longo E. Ag Nanoparticles/AgX (X=Cl, Br and I) Composites with Enhanced Photocatalytic Activity and Low Toxicological Effects. ChemistrySelect 2020. [DOI: 10.1002/slct.202000502] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Affiliation(s)
- Marcelo Assis
- CDMFUniversidade Federal de São Carlos P.O. Box 676, 13565–905 São Carlos, São Paulo Brazil
| | | | - Dayene S. Pimentel
- CDMFUniversidade Federal de São Carlos P.O. Box 676, 13565–905 São Carlos, São Paulo Brazil
| | - Thaiane Robeldo
- Laboratory of Applied Immunology, Department of Genetics and EvolutionUniversidade Federal de São Carlos P.O. Box 676, 13565–905, São Carlos São Paulo Brazil
| | - Amanda F. Gouveia
- CDMFUniversidade Federal de São Carlos P.O. Box 676, 13565–905 São Carlos, São Paulo Brazil
| | - Tassia F. D. Castro
- Laboratory of Applied Immunology, Department of Genetics and EvolutionUniversidade Federal de São Carlos P.O. Box 676, 13565–905, São Carlos São Paulo Brazil
| | - Hirla C. S. Fukushima
- Laboratory of Applied Immunology, Department of Genetics and EvolutionUniversidade Federal de São Carlos P.O. Box 676, 13565–905, São Carlos São Paulo Brazil
| | - Camila C. Foggi
- CDMFUniversidade Federal de São Carlos P.O. Box 676, 13565–905 São Carlos, São Paulo Brazil
| | - João P. C. Costa
- CDMFUniversidade Federal de São Carlos P.O. Box 676, 13565–905 São Carlos, São Paulo Brazil
| | - Ricardo C. Borra
- Laboratory of Applied Immunology, Department of Genetics and EvolutionUniversidade Federal de São Carlos P.O. Box 676, 13565–905, São Carlos São Paulo Brazil
| | - Juan Andrés
- Department of Analytical and Physical ChemistryUniversity Jaume I (UJI) Castelló 12071 Spain
| | - Elson Longo
- CDMFUniversidade Federal de São Carlos P.O. Box 676, 13565–905 São Carlos, São Paulo Brazil
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11
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Tang H, Lin L, Zhang C, Tang Q. High-Sensitivity and Wide-Linear-Range Thermoluminescence Dosimeter LiMgPO 4:Tm,Tb,B for Detecting High-Dose Radiation. Inorg Chem 2019; 58:9698-9705. [PMID: 31283195 DOI: 10.1021/acs.inorgchem.9b00597] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
High-sensitivity and wide-linear-range thermoluminescence dosimeter (TLD) is of importance for detecting high-dose radiation in industry, medicine, and agriculture as well as materials and food processing. In this work, we synthesize a series of LiMgPO4 doped with Tm3+, Tb3+, and B3+ via a high-temperature solid-state reaction technique. To observe the effect of dopants, we first investigate the structure by Rietveld refinement of high-quality X-ray diffraction (XRD) data and then study the thermoluminescence (TL) properties of samples radiated by β-rays in detail. The TL signal of LiMgPO4:Tm,Tb,B is originated from Tm3+ 4f-4f transitions. The kinetic parameters are obtained through fitting the TL glow curve based on the general-order kinetics model, revealing that the dominant TL peak at ∼323 °C is related to ∼1.49 eV trap. Through constructing the vacuum-referred binding energy (VRBE) scheme, we uncover that this deep trap mainly originates from the Tb3+ dopant acted as the captured center of free hole. After codoping 0.6% B3+, the sensitivity of sample as TLD increases ∼170%. According to the radiation dose-dependent TL intensities, the sensitivity of LiMgPO4:Tm,Tb,B is about 200% larger than that of the commercial LiF:Mg,Cu,P at 0.08 Gy, and more sensitive at higher dose. Moreover, the studied sample has wider linear range (up to 10 000 Gy) toward high-dose side, good reproducibility (RSD ∼ 4.6%), and weak fading (∼8% after 34 days), and therefore has potential application as TLD for monitoring high-dose radiation.
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Affiliation(s)
- Huaming Tang
- School of Physics , Sun Yat-sen University , Guangzhou 510275 , China
| | - Litian Lin
- Guangdong Province Key Laboratory of Rare Earth Development and Application, Guangdong Research Institute of Rare Metals , Guangdong Academy of Science , Guangzhou 510651 , China
| | - Chunxiang Zhang
- School of Physics , Sun Yat-sen University , Guangzhou 510275 , China
| | - Qiang Tang
- School of Physics , Sun Yat-sen University , Guangzhou 510275 , China
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12
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Li J, Wang Z, Li Y, Deepak FL. In Situ Atomic-Scale Observation of Kinetic Pathways of Sublimation in Silver Nanoparticles. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2019; 6:1802131. [PMID: 31016119 PMCID: PMC6468973 DOI: 10.1002/advs.201802131] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/26/2018] [Indexed: 05/21/2023]
Abstract
Uncovering kinetics of sublimation atomically is critical to understanding both natural phenomena and advanced manufacturing technologies. Here, direct in situ atomic-scale observations to understand the effects of size, surface, and defects in the sublimation process of supported silver nanoparticles upon heating within an aberration-corrected transmission electron microscopy are conducted. Atomic-scale evidence to sublimation and atomic rearrangement in small Ag nanoparticles during heating is provided, and it is demonstrated that the sublimation-induced stable surfaces in the particles with a size smaller than ≈30 nm are {111} and {100} planes. The role of surface energy and defects in the uniform and nonuniform sublimation pathways at the atomic scale is also revealed, and it is found that the nanoparticles with low surface energy tend to undergo a uniform sublimation pathway, while those with high surface energy or five-fold twin grain boundary proceed via a nonuniform sublimation pathway. Further dynamic analysis unravels a critical size of ≈8 nm for the transformation from linear to nonlinear sublimation rates in the two pathways. These findings demonstrate that the size, shape, and defects are of paramount importance for the sublimation dynamics in the first-order phase transformation, helping to advance the general understanding of many technological applications.
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Affiliation(s)
- Junjie Li
- Nanostructured Materials GroupDepartment of Advanced Electron MicroscopyImaging and SpectroscopyInternational Iberian Nanotechnology Laboratory (INL)Avenida Mestre Jose VeigaBraga4715‐330Portugal
| | - Zhongchang Wang
- Department of Quantum and Energy MaterialsInternational Iberian Nanotechnology Laboratory (INL)Avenida Mestre Jose VeigaBraga4715‐330Portugal
- Advanced Institute for Materials ResearchTohoku University2‐1‐1 KatahiraAoba‐kuSendai980‐8577Japan
| | - Yunping Li
- State Key Lab for Powder MetallurgyCentral South UniversityChangsha410083China
| | - Francis Leonard Deepak
- Nanostructured Materials GroupDepartment of Advanced Electron MicroscopyImaging and SpectroscopyInternational Iberian Nanotechnology Laboratory (INL)Avenida Mestre Jose VeigaBraga4715‐330Portugal
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13
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Plasmon induced interfacial charge transfer across Zr-based metal-organic framework coupled Ag2WO4 heterojunction functionalized by Ag NPs: Efficient visible light photocatalyst. Chem Phys Lett 2019. [DOI: 10.1016/j.cplett.2019.02.005] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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14
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Macedo NG, Machado TR, Roca RA, Assis M, Foggi CC, Puerto-Belda V, Mínguez-Vega G, Rodrigues A, San-Miguel MA, Cordoncillo E, Beltrán-Mir H, Andrés J, Longo E. Tailoring the Bactericidal Activity of Ag Nanoparticles/α-Ag2WO4 Composite Induced by Electron Beam and Femtosecond Laser Irradiation: Integration of Experiment and Computational Modeling. ACS APPLIED BIO MATERIALS 2019; 2:824-837. [DOI: 10.1021/acsabm.8b00673] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Nadia G. Macedo
- CDMF, LIEC, Federal University of São Carlos (UFSCar), P.O. Box 676, São Carlos, São Paulo13565-905, Brazil
| | - Thales R. Machado
- CDMF, LIEC, Federal University of São Carlos (UFSCar), P.O. Box 676, São Carlos, São Paulo13565-905, Brazil
| | - Roman A. Roca
- CDMF, LIEC, Federal University of São Carlos (UFSCar), P.O. Box 676, São Carlos, São Paulo13565-905, Brazil
| | - Marcelo Assis
- CDMF, LIEC, Federal University of São Carlos (UFSCar), P.O. Box 676, São Carlos, São Paulo13565-905, Brazil
| | - Camila Cristina Foggi
- CDMF, LIEC, Federal University of São Carlos (UFSCar), P.O. Box 676, São Carlos, São Paulo13565-905, Brazil
| | | | | | - André Rodrigues
- Department of Physical Chemistry, Institute of Chemistry, State University of Campinas, Campinas, São Paulo 13083-970, Brazil
| | - Miguel A. San-Miguel
- Department of Physical Chemistry, Institute of Chemistry, State University of Campinas, Campinas, São Paulo 13083-970, Brazil
| | | | | | | | - Elson Longo
- CDMF, LIEC, Federal University of São Carlos (UFSCar), P.O. Box 676, São Carlos, São Paulo13565-905, Brazil
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15
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P. S. L, G. S. S, R. A. R, M. A, R. TM, H. BM, G. MV, E. C, J. A, E. L. Laser and electron beam-induced formation of Ag/Cr structures on Ag2CrO4. Phys Chem Chem Phys 2019; 21:6101-6111. [DOI: 10.1039/c8cp07263a] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
The interactions of silver chromate with a femtosecond laser and electron beam irradiations were investigated.
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Affiliation(s)
- Lemos P. S.
- INCTMN-CDMF, Universidade Federal de São Carlos
- 13565-905 São Carlos
- Brazil
| | - Silva G. S.
- INCTMN-CDMF, Universidade Federal de São Carlos
- 13565-905 São Carlos
- Brazil
| | - Roca R. A.
- INCTMN-CDMF, Universidade Federal de São Carlos
- 13565-905 São Carlos
- Brazil
| | - Assis M.
- INCTMN-CDMF, Universidade Federal de São Carlos
- 13565-905 São Carlos
- Brazil
| | - Torres-Mendieta R.
- Institute for Nanomaterials, Advanced Technologies and Innovation, Technical University of Liberec
- 461 17 Liberec
- Czech Republic
| | - Beltrán-Mir H.
- Department of Inorganic and Organic Chemistry, University Jaume I (UJI)
- Castelló 12071
- Spain
| | - Mínguez-Vega G.
- GROC UJI, Institut de Noves Tecnologies de la Imatge (INIT), University Jaume I (UJI)
- Castelló 12071
- Spain
| | - Cordoncillo E.
- Department of Inorganic and Organic Chemistry, University Jaume I (UJI)
- Castelló 12071
- Spain
| | - Andrés J.
- Department of Analytical and Physical Chemistry, University Jaume I (UJI)
- Castelló 12071
- Spain
| | - Longo E.
- INCTMN-UNESP, Universidade Estadual Paulista
- 14801-907 Araraquara
- Brazil
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16
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Askari P, Mohebbi S, Do TO. High performance plasmonic activation of Ag on β-Ag2WO4/BiVO4 as nanophotocatalyst for oxidation of alcohols by incident visible light. J Photochem Photobiol A Chem 2018. [DOI: 10.1016/j.jphotochem.2018.08.013] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
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17
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Haro Chávez NL, de Avila ED, Barbugli PA, de Oliveira RC, de Foggi CC, Longo E, Vergani CE. Promising effects of silver tungstate microcrystals on fibroblast human cells and three dimensional collagen matrix models: A novel non-cytotoxic material to fight oral disease. Colloids Surf B Biointerfaces 2018; 170:505-513. [DOI: 10.1016/j.colsurfb.2018.06.023] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2018] [Revised: 05/21/2018] [Accepted: 06/15/2018] [Indexed: 12/21/2022]
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18
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Magnetically recoverable highly efficient visible-light-active g-C3N4/Fe3O4/Ag2WO4/AgBr nanocomposites for photocatalytic degradations of environmental pollutants. ADV POWDER TECHNOL 2018. [DOI: 10.1016/j.apt.2017.10.016] [Citation(s) in RCA: 101] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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19
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Pirhashemi M, Habibi-Yangjeh A. Ultrasonic-assisted preparation of plasmonic ZnO/Ag/Ag2WO4 nanocomposites with high visible-light photocatalytic performance for degradation of organic pollutants. J Colloid Interface Sci 2017; 491:216-229. [DOI: 10.1016/j.jcis.2016.12.044] [Citation(s) in RCA: 237] [Impact Index Per Article: 33.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2016] [Revised: 12/15/2016] [Accepted: 12/17/2016] [Indexed: 11/30/2022]
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20
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Roca RA, Lemos PS, Gracia L, Andrés J, Longo E. Uncovering the metastable γ-Ag2WO4 phase: a joint experimental and theoretical study. RSC Adv 2017. [DOI: 10.1039/c6ra24692c] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A combination of experiments and simulation provides a fundamental understanding of the structure of materials.
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Affiliation(s)
- Roman Alvarez Roca
- CDMF-UFSCar-Universidade Federal de São Carlos
- 13565-905 São Carlos
- Brazil
| | - Pablo S. Lemos
- CDMF-UFSCar-Universidade Federal de São Carlos
- 13565-905 São Carlos
- Brazil
| | - Lourdes Gracia
- Department of Analytical and Physical Chemistry
- University Jaume I (UJI)
- Castelló 12071
- Spain
| | - Juan Andrés
- Department of Analytical and Physical Chemistry
- University Jaume I (UJI)
- Castelló 12071
- Spain
| | - Elson Longo
- CDMF-UFSCar-Universidade Federal de São Carlos
- 13565-905 São Carlos
- Brazil
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