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Khairani IY, Lin Q, Landers J, Salamon S, Doñate-Buendía C, Karapetrova E, Wende H, Zangari G, Gökce B. Solvent Influence on the Magnetization and Phase of Fe-Ni Alloy Nanoparticles Generated by Laser Ablation in Liquids. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:227. [PMID: 36677981 PMCID: PMC9864041 DOI: 10.3390/nano13020227] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/06/2022] [Revised: 12/28/2022] [Accepted: 12/28/2022] [Indexed: 06/17/2023]
Abstract
The synthesis of bimetallic iron-nickel nanoparticles with control over the synthesized phases, particle size, surface chemistry, and oxidation level remains a challenge that limits the application of these nanoparticles. Pulsed laser ablation in liquid allows the properties tuning of the generated nanoparticles by changing the ablation solvent. Organic solvents such as acetone can minimize nanoparticle oxidation. Yet, economical laboratory and technical grade solvents that allow cost-effective production of FeNi nanoparticles contain water impurities, which are a potential source of oxidation. Here, we investigated the influence of water impurities in acetone on the properties of FeNi nanoparticles generated by pulsed laser ablation in liquids. To remove water impurities and produce "dried acetone", cost-effective and reusable molecular sieves (3 Å) are employed. The results show that the Fe50Ni50 nanoparticles' properties are influenced by the water content of the solvent. The metastable HCP FeNi phase is found in NPs prepared in acetone, while only the FCC phase is observed in NPs formed in water. Mössbauer spectroscopy revealed that the FeNi nanoparticles oxidation in dried acetone is reduced by 8% compared to acetone. The high-field magnetization of Fe50Ni50 nanoparticles in water is the highest, 68 Am2/kg, followed by the nanoparticles obtained after ablation in acetone without water impurities, 59 Am2/kg, and acetone, 52 Am2/kg. The core-shell structures formed in these three liquids are also distinctive, demonstrating that a core-shell structure with an outer oxide layer is formed in water, while carbon external layers are obtained in acetone without water impurity. The results confirm that the size, structure, phase, and oxidation of FeNi nanoparticles produced by pulsed laser ablation in liquids can be modified by changing the solvent or just reducing the water impurities in the organic solvent.
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Affiliation(s)
- Inna Y. Khairani
- Chair of Materials Science and Additive Manufacturing, School of Mechanical Engineering and Safety Engineering, University of Wuppertal, 42119 Wuppertal, Germany
| | - Qiyuan Lin
- Department of Materials Science and Engineering, University of Virginia, Charlottesville, VA 22903, USA
| | - Joachim Landers
- Faculty of Physics and Center for Nanointegration Duisburg-Essen (CENIDE), University of Duisburg-Essen, 47057 Duisburg, Germany
| | - Soma Salamon
- Faculty of Physics and Center for Nanointegration Duisburg-Essen (CENIDE), University of Duisburg-Essen, 47057 Duisburg, Germany
| | - Carlos Doñate-Buendía
- Chair of Materials Science and Additive Manufacturing, School of Mechanical Engineering and Safety Engineering, University of Wuppertal, 42119 Wuppertal, Germany
| | | | - Heiko Wende
- Faculty of Physics and Center for Nanointegration Duisburg-Essen (CENIDE), University of Duisburg-Essen, 47057 Duisburg, Germany
| | - Giovanni Zangari
- Department of Materials Science and Engineering, University of Virginia, Charlottesville, VA 22903, USA
| | - Bilal Gökce
- Chair of Materials Science and Additive Manufacturing, School of Mechanical Engineering and Safety Engineering, University of Wuppertal, 42119 Wuppertal, Germany
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Laser Ablation of NiFe 2O 4 and CoFe 2O 4 Nanoparticles. NANOMATERIALS 2022; 12:nano12111872. [PMID: 35683727 PMCID: PMC9181974 DOI: 10.3390/nano12111872] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/27/2022] [Revised: 05/24/2022] [Accepted: 05/26/2022] [Indexed: 01/27/2023]
Abstract
Pulsed laser ablation in liquids was utilized to prepare NiFe2O4 (NFO) and CoFe2O4 (CFO) nanoparticles from ceramic targets. The morphology, crystallinity, composition, and particle size distribution of the colloids were investigated. We were able to identify decomposition products formed during the laser ablation process in water. Attempts to fractionate the nanoparticles using the high-gradient magnetic separation method were performed. The nanoparticles with crystallite sizes in the range of 5–100 nm possess superparamagnetic behavior and approximately 20 Am2/kg magnetization at room temperature. Their ability to absorb light in the visible range makes them potential candidates for catalysis applications in chemical reactions and in biomedicine.
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Nadarajah R, Tasdemir L, Thiel C, Salamon S, Semisalova AS, Wende H, Farle M, Barcikowski S, Erni D, Gökce B. Formation of Fe-Ni Nanoparticle Strands in Macroscopic Polymer Composites: Experiment and Simulation. NANOMATERIALS (BASEL, SWITZERLAND) 2021; 11:2095. [PMID: 34443925 PMCID: PMC8398175 DOI: 10.3390/nano11082095] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/13/2021] [Revised: 08/08/2021] [Accepted: 08/12/2021] [Indexed: 02/04/2023]
Abstract
Magnetic-field-induced strand formation of ferromagnetic Fe-Ni nanoparticles in a PMMA-matrix is correlated with the intrinsic material parameters, such as magnetization, particle size, composition, and extrinsic parameters, including magnetic field strength and viscosity. Since various factors can influence strand formation, understanding the composite fabrication process that maintains the strand lengths of Fe-Ni in the generated structures is a fundamental step in predicting the resulting structures. Hence, the critical dimensions of the strands (length, width, spacing, and aspect ratio) are investigated in the experiments and simulated via different intrinsic and extrinsic parameters. Optimal parameters were found by optical microscopy measurements and finite-element simulations using COMSOL for strand formation of Fe50Ni50 nanoparticles. The anisotropic behavior of the aligned strands was successfully characterized through magnetometry measurements. Compared to the unaligned samples, the magnetically aligned strands exhibit enhanced conductivity, increasing the current by a factor of 1000.
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Affiliation(s)
- Ruksan Nadarajah
- Technical Chemistry I, Center for Nanointegration Duisburg-Essen (CENIDE), University of Duisburg-Essen, Universitaetsstr. 7, 45141 Essen, Germany; (R.N.); (L.T.); (S.B.)
| | - Leyla Tasdemir
- Technical Chemistry I, Center for Nanointegration Duisburg-Essen (CENIDE), University of Duisburg-Essen, Universitaetsstr. 7, 45141 Essen, Germany; (R.N.); (L.T.); (S.B.)
| | - Christian Thiel
- General and Theoretical Electrical Engineering (ATE), Center for Nanointegration Duisburg-Essen (CENIDE), University Duisburg-Essen, 47048 Duisburg, Germany; (C.T.); (D.E.)
| | - Soma Salamon
- Faculty of Physics, Center for Nanointegration Duisburg-Essen (CENIDE), University of Duisburg-Essen, Lotharstr. 1, 47057 Duisburg, Germany; (S.S.); (A.S.S.); (H.W.); (M.F.)
| | - Anna S. Semisalova
- Faculty of Physics, Center for Nanointegration Duisburg-Essen (CENIDE), University of Duisburg-Essen, Lotharstr. 1, 47057 Duisburg, Germany; (S.S.); (A.S.S.); (H.W.); (M.F.)
| | - Heiko Wende
- Faculty of Physics, Center for Nanointegration Duisburg-Essen (CENIDE), University of Duisburg-Essen, Lotharstr. 1, 47057 Duisburg, Germany; (S.S.); (A.S.S.); (H.W.); (M.F.)
| | - Michael Farle
- Faculty of Physics, Center for Nanointegration Duisburg-Essen (CENIDE), University of Duisburg-Essen, Lotharstr. 1, 47057 Duisburg, Germany; (S.S.); (A.S.S.); (H.W.); (M.F.)
| | - Stephan Barcikowski
- Technical Chemistry I, Center for Nanointegration Duisburg-Essen (CENIDE), University of Duisburg-Essen, Universitaetsstr. 7, 45141 Essen, Germany; (R.N.); (L.T.); (S.B.)
| | - Daniel Erni
- General and Theoretical Electrical Engineering (ATE), Center for Nanointegration Duisburg-Essen (CENIDE), University Duisburg-Essen, 47048 Duisburg, Germany; (C.T.); (D.E.)
| | - Bilal Gökce
- Technical Chemistry I, Center for Nanointegration Duisburg-Essen (CENIDE), University of Duisburg-Essen, Universitaetsstr. 7, 45141 Essen, Germany; (R.N.); (L.T.); (S.B.)
- Materials Science and Additive Manufacturing, University of Wuppertal, Gaußstr. 20, 42119 Wuppertal, Germany
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Geoffrion LD, Medina-Cruz D, Kusper M, Elsaidi S, Watanabe F, Parajuli P, Ponce A, Hoang TB, Brintlinger T, Webster TJ, Guisbiers G. Bi 2O 3 nano-flakes as a cost-effective antibacterial agent. NANOSCALE ADVANCES 2021; 3:4106-4118. [PMID: 36132830 PMCID: PMC9417114 DOI: 10.1039/d0na00910e] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/30/2020] [Accepted: 06/04/2021] [Indexed: 06/15/2023]
Abstract
Bismuth oxide is an important bismuth compound having applications in electronics, photo-catalysis and medicine. At the nanoscale, bismuth oxide experiences a variety of new physico-chemical properties because of its increased surface to volume ratio leading to potentially new applications. In this manuscript, we report for the very first time the synthesis of bismuth oxide (Bi2O3) nano-flakes by pulsed laser ablation in liquids without any external assistance (no acoustic, electric field, or magnetic field). The synthesis was performed by irradiating, pure bismuth needles immerged in de-ionized water, at very high fluence ∼160 J cm-2 in order to be highly selective and only promote the growth of two-dimensional structures. The x- and y-dimensions of the flakes were around 1 μm in size while their thickness was 47.0 ± 12.7 nm as confirmed by AFM analysis. The flakes were confirmed to be α- and γ-Bi2O3 by SAED and Raman spectroscopy. By using this mixture of flakes, we demonstrated that the nanostructures can be used as antimicrobial agents, achieving a complete inhibition of Gram positive (MSRA) and Gram negative bacteria (MDR-EC) at low concentration, ∼50 ppm.
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Affiliation(s)
- Luke D Geoffrion
- Department of Physics & Astronomy, University of Arkansas Little Rock 2801 South University Avenue Little Rock AR 72204 USA
| | - David Medina-Cruz
- Department of Chemical Engineering, Northeastern University, 313 Snell Engineering Center 360 Huntington Avenue Boston MA 02115 USA
| | - Matthew Kusper
- Department of Physics & Astronomy, University of Arkansas Little Rock 2801 South University Avenue Little Rock AR 72204 USA
| | - Sakr Elsaidi
- Department of Physics & Astronomy, University of Arkansas Little Rock 2801 South University Avenue Little Rock AR 72204 USA
| | - Fumiya Watanabe
- Center for Integrative Nanotechnology Sciences 2801 South University Avenue Little Rock AR 72204 USA
| | - Prakash Parajuli
- Department of Physics & Astronomy, The University of Texas at San Antonio One UTSA circle San Antonio TX 78249 USA
| | - Arturo Ponce
- Department of Physics & Astronomy, The University of Texas at San Antonio One UTSA circle San Antonio TX 78249 USA
| | - Thang Ba Hoang
- Department of Physics & Materials Science, The University of Memphis Memphis TN 38152 USA
| | - Todd Brintlinger
- U.S. Naval Research Laboratory, Nanoscale Materials Section 4555 Overlook Ave SW Washington DC 20375 USA
| | - Thomas J Webster
- Department of Chemical Engineering, Northeastern University, 313 Snell Engineering Center 360 Huntington Avenue Boston MA 02115 USA
| | - Grégory Guisbiers
- Department of Physics & Astronomy, University of Arkansas Little Rock 2801 South University Avenue Little Rock AR 72204 USA
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Guadagnini A, Agnoli S, Badocco D, Pastore P, Pilot R, Ravelle-Chapuis R, van Raap MBF, Amendola V. Kinetically Stable Nonequilibrium Gold-Cobalt Alloy Nanoparticles with Magnetic and Plasmonic Properties Obtained by Laser Ablation in Liquid. Chemphyschem 2021; 22:657-664. [PMID: 33559943 DOI: 10.1002/cphc.202100021] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2021] [Revised: 02/08/2021] [Indexed: 12/21/2022]
Abstract
Nonequilibrium nanoalloys are metastable solids obtained at the nanoscale under nonequilibrium conditions that allow the study of kinetically frozen atoms and the discovery of new physical and chemical properties. However, the stabilization of metastable phases in the nanometric size regime is challenging and the synthetic route should be easy and sustainable, for the nonequilibrium nanoalloys to be practically available. Here we report on the one-step laser ablation synthesis in solution (LASiS) of nonequilibrium Au-Co alloy nanoparticles (NPs) and their characterization on ensembles and at the single nanoparticle level. The NPs are obtained as a polycrystalline solid solution stable in air and water, although surface cobalt atoms undergo oxidation to Co(II). Since gold is a renowned plasmonic material and metallic cobalt is ferromagnetic at room temperature, these properties are both found in the NPs. Besides, surface conjugation with thiolated molecules is possible and it was exploited to obtain colloidally stable solutions in water. Taking advantage of these features, an array of magnetic-plasmonic dots was obtained and used for surface-enhanced Raman scattering experiments. Overall, this study confirms that LASiS is an effective method for the formation of kinetically stable nonequilibrium nanoalloys and shows that Au-Co alloy NPs are appealing magnetically responsive plasmonic building blocks for several nanotechnological applications.
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Affiliation(s)
- Andrea Guadagnini
- Department of Chemical Sciences, Università di Padova, via Marzolo 1, I-35131, Padova, Italy
| | - Stefano Agnoli
- Department of Chemical Sciences, Università di Padova, via Marzolo 1, I-35131, Padova, Italy
| | - Denis Badocco
- Department of Chemical Sciences, Università di Padova, via Marzolo 1, I-35131, Padova, Italy
| | - Paolo Pastore
- Department of Chemical Sciences, Università di Padova, via Marzolo 1, I-35131, Padova, Italy
| | - Roberto Pilot
- Department of Chemical Sciences, Università di Padova, via Marzolo 1, I-35131, Padova, Italy.,Consorzio INSTM, UdR Padova, Italy
| | | | - Marcela B Fernández van Raap
- Physics Institute of La Plata (IFLP-CONICET), Physics Department Faculty of Exact Sciences, National University of La Plata, La Plata, Argentina
| | - Vincenzo Amendola
- Department of Chemical Sciences, Università di Padova, via Marzolo 1, I-35131, Padova, Italy
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6
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Broadhead EJ, Monroe A, Tibbetts KM. Deposition of Cubic Copper Nanoparticles on Silicon Laser-Induced Periodic Surface Structures via Reactive Laser Ablation in Liquid. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:3740-3750. [PMID: 33740377 DOI: 10.1021/acs.langmuir.1c00238] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
We report the deposition of cubic copper nanoparticles (Cu NPs) of varying size and particle density on silicon laser-induced periodic surface structures via reactive laser ablation in liquid (RLAL) using intense femtosecond laser pulses. Two syntheses were compared: (1) simultaneous deposition, wherein a silicon wafer was laser-processed in aqueous Cu(NO3)2 solution and (2) sequential deposition, wherein the silicon wafer was laser-processed in water and then exposed to aqueous Cu(NO3)2. Only simultaneous deposition resulted in high Cu loading and cubic Cu NPs deposited on the surface. The solution pH, Cu(NO3)2 concentration, and sample translation rate were varied to determine their effects on the size, morphology, and density of Cu NPs. Solution pH near ∼6.8 maximized Cu deposition. The Cu(NO3)2 concentration affected the Cu NP morphology but not the size or Cu loading. The sample translation rate most significantly affected the Cu loading, particle size, and particle density. The observed synthesis parameter dependence of these Cu NP properties resembles results by electrodeposition to grow Cu NPs on silicon surfaces, which suggests that Cu NP deposition by RLAL follows a mechanism similar to electrodeposition.
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Affiliation(s)
- Eric J Broadhead
- Department of Chemistry, Virginia Commonwealth University, Richmond, Virginia 23284, United States
| | - Avery Monroe
- Department of Chemistry, Virginia Commonwealth University, Richmond, Virginia 23284, United States
| | - Katharine Moore Tibbetts
- Department of Chemistry, Virginia Commonwealth University, Richmond, Virginia 23284, United States
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Abstract
Vincenzo Amendola is Professor of Physical Chemistry at Padova University, where he established and directs the Laser-Assisted Synthesis and Plasmonics (LASP) lab. He obtained a PhD in Materials Science and Engineering in 2008 and the Italian qualification as Full Professor in 2017, after research experience at Massachusetts Institute of Technology and Cambridge University. He is part of the Program Committee of the ANGEL conference series and he is a current member of the ChemPhysChem Editorial Advisory Board.
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Affiliation(s)
- Vincenzo Amendola
- Department of Chemical Sciences, Università di Padova, via Marzolo 1, I-35131, Padova, Italy
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8
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One-step fabrication of brass filter with reversible wettability by nanosecond fiber laser ablation for highly efficient oil/water separation. Sep Purif Technol 2021. [DOI: 10.1016/j.seppur.2020.118139] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Amendola V, Amans D, Ishikawa Y, Koshizaki N, Scirè S, Compagnini G, Reichenberger S, Barcikowski S. Room-Temperature Laser Synthesis in Liquid of Oxide, Metal-Oxide Core-Shells, and Doped Oxide Nanoparticles. Chemistry 2020; 26:9206-9242. [PMID: 32311172 PMCID: PMC7497020 DOI: 10.1002/chem.202000686] [Citation(s) in RCA: 80] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2020] [Indexed: 11/06/2022]
Abstract
Although oxide nanoparticles are ubiquitous in science and technology, a multitude of compositions, phases, structures, and doping levels exist, each one requiring a variety of conditions for their synthesis and modification. Besides, experimental procedures are frequently dominated by high temperatures or pressures and by chemical contaminants or waste. In recent years, laser synthesis of colloids emerged as a versatile approach to access a library of clean oxide nanoparticles relying on only four main strategies running at room temperature and ambient pressure: laser ablation in liquid, laser fragmentation in liquid, laser melting in liquid and laser defect-engineering in liquid. Here, established laser-based methodologies are reviewed through the presentation of a panorama of oxide nanoparticles which include pure oxidic phases, as well as unconventional structures like defective or doped oxides, non-equilibrium compounds, metal-oxide core-shells and other anisotropic morphologies. So far, these materials showed several useful properties that are discussed with special emphasis on catalytic, biomedical and optical application. Yet, given the endless number of mixed compounds accessible by the laser-assisted methodologies, there is still a lot of room to expand the library of nano-crystals and to refine the control over products as well as to improve the understanding of the whole process of nanoparticle formation. To that end, this review aims to identify the perspectives and unique opportunities of laser-based synthesis and processing of colloids for future studies of oxide nanomaterial-oriented sciences.
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Affiliation(s)
- Vincenzo Amendola
- Department of Chemical SciencesUniversity of PadovaVia Marzolo 135131ParovaItaly
| | - David Amans
- CNRSInstitut Lumière MatièreUniv Lyon, Université Claude Bernard Lyon 1
| | - Yoshie Ishikawa
- Nanomaterials Research InstituteNational Institute of Advanced Industrial Science and Technology (AIST)Tsukuba Central 5, 1-1-1 HigashiTsukubaIbaraki305-8565Japan
| | - Naoto Koshizaki
- Graduate School of EngineeringHokkaido UniversityKita 13 Nishi 8, Kita-kuSapporoHokkaido060-8628Japan
| | - Salvatore Scirè
- Department of Chemical SciencesUniversity of CataniaViale A. Doria 6Catania95125Italy
| | - Giuseppe Compagnini
- Department of Chemical SciencesUniversity of CataniaViale A. Doria 6Catania95125Italy
| | - Sven Reichenberger
- Technical Chemistry I andCenter for Nanointegration Duisburg-Essen (CENIDE)University Duisburg-EssenUniversitätstr. 745141EssenGermany
| | - Stephan Barcikowski
- Technical Chemistry I andCenter for Nanointegration Duisburg-Essen (CENIDE)University Duisburg-EssenUniversitätstr. 745141EssenGermany
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Bretos I, Diodati S, Jiménez R, Tajoli F, Ricote J, Bragaggia G, Franca M, Calzada ML, Gross S. Low-Temperature Solution Crystallization of Nanostructured Oxides and Thin Films. Chemistry 2020; 26:9157-9179. [PMID: 32212279 DOI: 10.1002/chem.202000448] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2020] [Revised: 03/16/2020] [Indexed: 01/27/2023]
Abstract
As an introduction to this themed issue, a critically selected overview of recent progress on the topic of solution methods for the low-temperature crystallization of nanoscale oxide materials is presented. It is focused on the low-temperature solution processing of oxide nanostructures and thin films. Benefits derived from these methods span from minimizing the environmental impact to reducing the fabrication costs. In addition, this topic is regarded as a key objective in the area because it offers a unique opportunity for the use of these materials in areas like flexible electronics, energy conversion and storage, environmental sciences, catalysis, or biomedicine.
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Affiliation(s)
- Iñigo Bretos
- Instituto de Ciencia de Materiales de Madrid, Consejo Superior de Investigaciones Científicas (ICMM-CSIC), C/ Sor Juana Inés de la Cruz, 3. Cantoblanco, 28049, Madrid, Spain
| | - Stefano Diodati
- Dipartimento di Scienze Chimiche, Università degli Studi di Padova, Via Marzolo 1, 35131, Padova, Italy
| | - Ricardo Jiménez
- Instituto de Ciencia de Materiales de Madrid, Consejo Superior de Investigaciones Científicas (ICMM-CSIC), C/ Sor Juana Inés de la Cruz, 3. Cantoblanco, 28049, Madrid, Spain
| | - Francesca Tajoli
- Dipartimento di Scienze Chimiche, Università degli Studi di Padova, Via Marzolo 1, 35131, Padova, Italy
| | - Jesús Ricote
- Instituto de Ciencia de Materiales de Madrid, Consejo Superior de Investigaciones Científicas (ICMM-CSIC), C/ Sor Juana Inés de la Cruz, 3. Cantoblanco, 28049, Madrid, Spain
| | - Giulia Bragaggia
- Dipartimento di Scienze Chimiche, Università degli Studi di Padova, Via Marzolo 1, 35131, Padova, Italy
| | - Marina Franca
- Dipartimento di Scienze Chimiche, Università degli Studi di Padova, Via Marzolo 1, 35131, Padova, Italy
| | - Maria Lourdes Calzada
- Instituto de Ciencia de Materiales de Madrid, Consejo Superior de Investigaciones Científicas (ICMM-CSIC), C/ Sor Juana Inés de la Cruz, 3. Cantoblanco, 28049, Madrid, Spain
| | - Silvia Gross
- Dipartimento di Scienze Chimiche, Università degli Studi di Padova, Via Marzolo 1, 35131, Padova, Italy
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Tang J, Sakamoto M, Ohta H, Saitow KI. 1% defect enriches MoS 2 quantum dot: catalysis and blue luminescence. NANOSCALE 2020; 12:4352-4358. [PMID: 31808769 DOI: 10.1039/c9nr07612c] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Defects in solids are typically recognized as unfavorable, leading to degradation of the structure and properties of the material. However, defects occasionally provide extraordinary benefits as the active sites of catalysts and chemical reactions, and can result in the creation of new electronic states. In particular, a low-dimensional material can become a defect-rich material due to the unique ratio of surface area to volume, giving many dangling bonds. Herein, we report the rapid (20 min) synthesis of MoS2 quantum dots (QDs) with a diameter of 4 nm at room temperature using nanosecond pulsed laser ablation in a binary solvent. The MoS2 QDs are crystalline particles composed of 3-5 layers and contain sulfur vacancies at an atomic concentration of 1% acting as a functional defect. The MoS2 QDs exhibit excellent electrocatalytic performance (Tafel slope = 49 mV dec-1) for the hydrogen evolution reaction and high quantum yield blue photoluminescence with a large Stokes shift.
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Affiliation(s)
- Jingmin Tang
- Department of chemistry, Graduate school of science, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima 739-8526, Japan.
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12
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Saitow KI, Okamoto Y, Suemori H. Size-Selected Submicron Gold Spheres: Controlled Assembly onto Metal, Carbon, and Plastic Substrates. ACS OMEGA 2019; 4:14307-14311. [PMID: 31508555 PMCID: PMC6733168 DOI: 10.1021/acsomega.9b01999] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/02/2019] [Accepted: 08/02/2019] [Indexed: 06/10/2023]
Abstract
Size-selected submicron spheres become very useful building blocks if the spheres could be synthesized and integrated at any desired position. In particular, spheres having a similar size to visible-light wavelength have attracted much attention. Here, we show the synthesis and assembly of size-selected submicron gold spheres using pulsed laser ablation of a gold plate in a supercritical fluid. Four findings were obtained in the study. Submicron spheres with a narrow size distribution were generated, and the polydispersity was ≈ 6%. The average diameter was controlled from 600 to 1000 nm. A thermodynamic condition for scalable synthesis was found. The assembly of spheres onto a metal, carbon, or plastic substrate was accomplished.
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Affiliation(s)
- Ken-Ichi Saitow
- Natural Science Center for Basic Research and Development (N-BARD), and Department of Chemistry, Graduate School of Science, Hiroshima University, 1-3-1 Kagamiyama, Higashi-hiroshima 739-8526, Japan
| | - Yoshinori Okamoto
- Natural Science Center for Basic Research and Development (N-BARD), and Department of Chemistry, Graduate School of Science, Hiroshima University, 1-3-1 Kagamiyama, Higashi-hiroshima 739-8526, Japan
| | - Hidemi Suemori
- Natural Science Center for Basic Research and Development (N-BARD), and Department of Chemistry, Graduate School of Science, Hiroshima University, 1-3-1 Kagamiyama, Higashi-hiroshima 739-8526, Japan
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13
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Mohazzab BF, Jaleh B, Nasrollahzadeh M, Issaabadi Z, Varma RS. Laser ablation-assisted synthesis of GO/TiO2/Au nanocomposite: Applications in K3[Fe(CN)6] and Nigrosin reduction. MOLECULAR CATALYSIS 2019. [DOI: 10.1016/j.mcat.2019.110401] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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14
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Crivellaro S, Guadagnini A, Arboleda DM, Schinca D, Amendola V. A system for the synthesis of nanoparticles by laser ablation in liquid that is remotely controlled with PC or smartphone. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2019; 90:033902. [PMID: 30927827 DOI: 10.1063/1.5083811] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
Nanoparticles find applications in multiple technological and scientific fields, and laser ablation in liquid (LAL) emerged as a versatile method for providing colloidal solutions of nanomaterials with various composition, by a low cost, simple, self-standing, and "green" procedure. However, the use of high energy and high power laser beams is harmful, especially when coupled with flammable or toxic liquids, and in situ operation is required for starting, monitoring the LAL synthesis, and stopping it at the desired point. Here we describe the hardware and software design and the test results of a system for the production of nanoparticles by laser ablation synthesis in liquid solution (LASiS), which is remotely controllable with a personal computer or a smartphone. In this system, laser energy and solution flux are selectable, and the synthesis status can be monitored and managed at any time off site. Only commercially available components and software are employed, making the whole apparatus easily reproducible in any LAL laboratory. The system has proven its reliability in various conditions, including intercontinental remote control experiments. Overall, this apparatus represents a step forward to improve the safety and to more efficiently exploit the time of people working with LASiS, thus contributing to the increasing demand for off-site real time monitoring of experimental equipment in many scientific and industrial laboratories, due to safety and efficiency requirements.
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Affiliation(s)
- Simone Crivellaro
- Department of Chemical Sciences, University of Padova, Padova, Italy
| | - Andrea Guadagnini
- Department of Chemical Sciences, University of Padova, Padova, Italy
| | - David Muñetón Arboleda
- Centro de Investigaciones Ópticas CIOp (CONICET-CIC-UNLP) and Facultad de Ingeniería UNLP, La Plata, Argentina
| | - Daniel Schinca
- Centro de Investigaciones Ópticas CIOp (CONICET-CIC-UNLP) and Facultad de Ingeniería UNLP, La Plata, Argentina
| | - Vincenzo Amendola
- Department of Chemical Sciences, University of Padova, Padova, Italy
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15
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Deng H, Chen F, Yang C, Chen M, Li L, Chen D. Effect of Eu doping concentration on fluorescence and magnetic resonance imaging properties of Gd 2O 3:Eu 3+ nanoparticles used as dual-modal contrast agent. NANOTECHNOLOGY 2018; 29:415601. [PMID: 30002260 DOI: 10.1088/1361-6528/aad347] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Europium-doped gadolinium oxide (Gd2O3:Eu3+) nanoparticles (NPs) with favorable properties for use in fluorescence imaging (FI) and magnetic resonance imaging (MRI) dual-modal contrast agent has attracted intense attention in biomedical applications. However, limited information is available on balancing FI and MRI by adjusting doping concentrations. In this study, Gd2O3:Eu3+ NPs with various Eu3+ doping concentrations were prepared by the facile and general technique of laser ablation in liquid (LAL). The influence of Eu3+-doping concentration on fluorescence properties and longitudinal relaxivity were investigated. The optimum Eu3+-doping concentration with both high fluorescence properties and longitudinal relaxivity was determined to be 5%. The characterization of the structure, morphology, and composition shows that these NPs possess good crystallinity and excellent dispersibility. These results show that Gd2O3:Eu3+ NPs prepared by LAL are promising candidates for highly efficient FI and MRI dual-modal contrast agents.
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Affiliation(s)
- Huawei Deng
- State Key Laboratory of Optoelectronic Materials and Technologies, School of Electronics and Information Technology, Sun Yat-sen University, Guangzhou 510275, People's Republic of China
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16
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Guided Slow Continuous Suspension Film Flow for Mass Production of Submicrometer Spherical Particles by Pulsed Laser Melting in Liquid. Sci Rep 2018; 8:14208. [PMID: 30242274 PMCID: PMC6155078 DOI: 10.1038/s41598-018-32528-6] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2018] [Accepted: 09/10/2018] [Indexed: 01/30/2023] Open
Abstract
Pulsed laser melting in liquid (PLML) is a technique to fabricate submicrometer crystalline spherical particles of various materials by laser irradiation of suspended raw particles with random shapes. To fully exploit the unique features of PLML-fabricated particles (crystalline and spherical) in practice, a mass-production PLML technique is required. To this end, the present study develops a new slit nozzle that guides the suspension film flow into a non-droplet continuous stream with a low flow rate. These two incompatible flow properties (continuity and slowness) are difficult to be realized for a liquid jet to free space. The suspension film flow was irradiated with a typical laboratory scale-flash lamp pumping laser at 30 Hz pulse frequency. Only a single flow passage of the slit nozzle with a few laser pulse irradiation transformed 95% of the raw particles into spherical particles. This spheroidizing ratio exceeded those of low-rate drip flow and high-rate cylindrical laminar flow directly jetted into free space through a Pasteur pipette nozzle. Extrapolating the data obtained from a 20-ml suspension, the average production rate was determined as 195 mg h−1. The high spheroidizing ratio and yield through the slit nozzle is attributable to the uniquely slow but continuous liquid film flow. The structure of the slit nozzle also prevents particles from adhering to the slit wall during continuous laser irradiation. Thus, the suspension film flow through the newly developed slit nozzle can potentially scale up the PLML technique to mass production.
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