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Sciancalepore C, Togliatti E, Marozzi M, Rizzi FMA, Pugliese D, Cavazza A, Pitirollo O, Grimaldi M, Milanese D. Flexible PBAT-Based Composite Filaments for Tunable FDM 3D Printing. ACS APPLIED BIO MATERIALS 2022; 5:3219-3229. [PMID: 35729847 PMCID: PMC9297287 DOI: 10.1021/acsabm.2c00203] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
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Biobased composites
with peculiar properties offer an attractive
route for producing environmentally friendly materials. The reinforcement
for poly(butylene adipate-co-terephthalate) (PBAT),
based on zein-titanium dioxide (TiO2) complex (ZTC) microparticles,
is presented and used to produce composite filaments, successfully
3-dimensionally (3D) printed by fused deposition modeling (FDM). The
outcome of ZTC addition, ranging from 5 to 40 wt %, on the thermo-mechanical
properties of composite materials was analyzed. Results reveal that
storage modulus increased with increasing the ZTC content, leading
to a slight increase in the glass transition temperature. The creep
compliance varies with the ZTC concentration, denoting a better resistance
to deformation under constant stress conditions for composites with
higher complex content. Scanning electron microscopy was used to assess
the quality of interphase adhesion between PBAT and ZTC, showing good
dispersion and distribution of complex microparticles in the polymer
matrix. Infrared spectroscopy confirmed the formation of a valid interface
due to the formation of hydrogen bonds between filler and polymer
matrix. Preliminary tests on the biocompatibility of these materials
were also performed, showing no cytotoxic effects on cell viability.
Finally, the 3D printability of biobased composites was demonstrated
by realizing complex structures with a commercial FDM printer.
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Affiliation(s)
- Corrado Sciancalepore
- Dipartimento di Ingegneria e Architettura, Università di Parma, Parco Area delle Scienze 181/A, 43124 Parma, Italia.,INSTM, Consorzio Interuniversitario Nazionale per la Scienza e la Tecnologia dei Materiali, Via G. Giusti 9, 50121 Firenze, Italia
| | - Elena Togliatti
- Dipartimento di Ingegneria e Architettura, Università di Parma, Parco Area delle Scienze 181/A, 43124 Parma, Italia.,INSTM, Consorzio Interuniversitario Nazionale per la Scienza e la Tecnologia dei Materiali, Via G. Giusti 9, 50121 Firenze, Italia
| | - Marina Marozzi
- Dipartimento di Medicina e Chirurgia, Università di Parma, Via Volturno 39/E, 43126 Parma, Italia
| | | | - Diego Pugliese
- Dipartimento di Scienza Applicata e Tecnologia, Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129 Torino, Italia.,INSTM, Consorzio Interuniversitario Nazionale per la Scienza e la Tecnologia dei Materiali, Via G. Giusti 9, 50121 Firenze, Italia
| | - Antonella Cavazza
- Dipartimento di Scienze Chimiche, della Vita e della Sostenibilità Ambientale, Università di Parma, Parco Area delle Scienze 17/A, 43124 Parma, Italia
| | - Olimpia Pitirollo
- Dipartimento di Scienze Chimiche, della Vita e della Sostenibilità Ambientale, Università di Parma, Parco Area delle Scienze 17/A, 43124 Parma, Italia
| | - Maria Grimaldi
- Dipartimento di Scienze Chimiche, della Vita e della Sostenibilità Ambientale, Università di Parma, Parco Area delle Scienze 17/A, 43124 Parma, Italia
| | - Daniel Milanese
- Dipartimento di Ingegneria e Architettura, Università di Parma, Parco Area delle Scienze 181/A, 43124 Parma, Italia.,INSTM, Consorzio Interuniversitario Nazionale per la Scienza e la Tecnologia dei Materiali, Via G. Giusti 9, 50121 Firenze, Italia
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2
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Separation of water–oil mixture on poly methyl methacrylate surface using TiO2 nanoparticles via molecular dynamics simulation. ADSORPTION 2019. [DOI: 10.1007/s10450-019-00119-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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3
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Barrera G, Sciancalepore C, Messori M, Allia P, Tiberto P, Bondioli F. Magnetite-epoxy nanocomposites obtained by the reactive suspension method: Microstructural, thermo-mechanical and magnetic properties. Eur Polym J 2017. [DOI: 10.1016/j.eurpolymj.2017.07.022] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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4
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Nguyen HTT, Habu T, Ohtani M, Kobiro K. One‐Step Direct Synthesis of SiO
2
–TiO
2
Composite Nanoparticle Assemblies with Hollow Spherical Morphology. Eur J Inorg Chem 2017. [DOI: 10.1002/ejic.201700253] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Hien Thi Thu Nguyen
- School of Environmental Science and Engineering Kochi University of Technology 185 Miyanokuchi 782‐8502 Tosayamada Kochi Japan
| | - Teppei Habu
- School of Environmental Science and Engineering Kochi University of Technology 185 Miyanokuchi 782‐8502 Tosayamada Kochi Japan
| | - Masataka Ohtani
- School of Environmental Science and Engineering Kochi University of Technology 185 Miyanokuchi 782‐8502 Tosayamada Kochi Japan
- Laboratory for Structural Nanochemistry Kochi University of Technology 185 Miyanokuchi 782‐8502 Tosayamada Kochi Japan
| | - Kazuya Kobiro
- School of Environmental Science and Engineering Kochi University of Technology 185 Miyanokuchi 782‐8502 Tosayamada Kochi Japan
- Laboratory for Structural Nanochemistry Kochi University of Technology 185 Miyanokuchi 782‐8502 Tosayamada Kochi Japan
- Research Center for Material Science and Engineering Kochi University of Technology 185 Miyanokuchi 782‐8502 Tosayamada Kochi Japan
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5
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Petronella F, Truppi A, Ingrosso C, Placido T, Striccoli M, Curri M, Agostiano A, Comparelli R. Nanocomposite materials for photocatalytic degradation of pollutants. Catal Today 2017. [DOI: 10.1016/j.cattod.2016.05.048] [Citation(s) in RCA: 138] [Impact Index Per Article: 19.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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6
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Prabunathan P, Thennarasu P, Song JK, Alagar M. Achieving low dielectric, surface free energy and UV shielding green nanocomposites via reinforcing bio-silica aerogel with polybenzoxazine. NEW J CHEM 2017. [DOI: 10.1039/c7nj00138j] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Silica aerogel (SA) derived from rice husk ash was functionalized using benzoxazine terminated silane (FSA) and was used as a nanoreinforcement for industrial valuable resin polybenzoxazine (PBZ) in order to achieve low dielectric, to improve the surface as hydrophobic and to enhance the UV shielding behavior of the resulting nanocomposites.
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Affiliation(s)
- P. Prabunathan
- Department of Handloom and Textile Technology
- Indian Institute of Handloom Technology Salem
- Salem-636001
- India
- Display Device and Material Lab
| | - P. Thennarasu
- Department of Handloom and Textile Technology
- Indian Institute of Handloom Technology Salem
- Salem-636001
- India
| | - J. K. Song
- Display Device and Material Lab
- School of Electronic & Electrical Engineering
- Sungkyunkwan University
- Suwon 440-746
- South Korea
| | - M. Alagar
- Centre of Excellence for Advanced Material Manufacturing
- Processing and Characterization (CoExAMMPC)
- VFSTR University
- Vadlamudi
- India
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7
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Cano L, Di Mauro AE, Striccoli M, Curri ML, Tercjak A. Optical and conductive properties of as-synthesized organic-capped TiO₂ nanorods highly dispersible in polystyrene-block-poly(methyl methacrylate) diblock copolymer. ACS APPLIED MATERIALS & INTERFACES 2014; 6:11805-11814. [PMID: 24979757 DOI: 10.1021/am502542k] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
As-synthesized organic-capped TiO2 nanorods were incorporated into polystyrene-block-poly(methyl methacrylate) (PS-b-PMMA) diblock copolymer to achieve TiO2/PS-b-PMMA nanocomposites with enhanced optical and conductive properties. The specific surface chemistry of TiO2 nanorods derived from the colloidal synthetic approach allowed their prompt incorporation in the PS-b-PMMA block copolymer template up to 50 wt %, which resulted in films with an extended coverage of highly dispersed nanoparticles for contents higher than 30 wt %. At such high nanorod contents, the films fabricated by the prepared nanocomposites demonstrated enhanced optical properties. Atomic force microscopy investigation of the nanocomposite films showed a cylindrical morphology for low nanorod contents. Conversely, higher nanorod contents resulted upon removal of the organic component in the nanocomposites with UV treatment in overall nanorod coverage of the film surface with the concomitant formation of charge percolation paths, which led to noticeable conductivity values. EFM and PF-TUNA measurements confirmed the conductive properties of the composites at nanoscale, whereas semiconductor analyzer measurements provided their macroscale characterization. In addition, an increase in the UV-vis absorption was observed with the increase in the nanorod content along with a remarkable conductivity of the overall film.
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Affiliation(s)
- Laida Cano
- Group Materials and Technologies, Chemical Engineering and Environmental Department, Polytechnic School, University of the Basque Country (UPV/EHU) , Plaza Europa 1, 20018 Donostia-San Sebastián, Spain
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8
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Carzino R, Pignatelli F, Farina D, Torre B, Scotto M, Marini L, Bertoni G, Caputo G, Cozzoli PD, Diaspro A, Athanassiou A. Laser-induced disaggregation of TiO₂ nanofillers for uniform nanocomposites. NANOTECHNOLOGY 2014; 25:125702. [PMID: 24572071 DOI: 10.1088/0957-4484/25/12/125702] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Exploiting the intrinsic photosensitivity of TiO₂ nanoparticles, we demonstrated how ultraviolet (UV) pulsed laser irradiation of acrylate polymer nanocomposite solutions can separate the initial clusters of these colloidal semiconductor nanorods into clearly distinct units. From the irradiated solutions, optically clear nanocomposite films are obtained which exhibit enhanced optical properties with respect to the nanocomposites obtained without previous UV treatment.
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Affiliation(s)
- R Carzino
- Fondazione Istituto Italiano di Tecnologia, Via Morego 30, I-16163 Genova, Italy
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9
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Al-Hussein M, Schindler M, Ruderer MA, Perlich J, Schwartzkopf M, Herzog G, Heidmann B, Buffet A, Roth SV, Müller-Buschbaum P. In situ X-ray study of the structural evolution of gold nano-domains by spray deposition on thin conductive P3HT films. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2013; 29:2490-2497. [PMID: 23360110 DOI: 10.1021/la3048483] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Gold (Au) nanoparticles are deposited from aqueous solution onto one of the most used conductive polymers, namely poly(3-hexylthiophene) (P3HT), using airbrush deposition. We report on the structure formation and packing of the Au nanoparticles after a 5 s spray cycle. In situ grazing incidence small-angle X-ray scattering (GISAXS) measurements with 20 ms time resolution allow a real-time observation of the emergence and evolution of the microstructure during a spray cycle and subsequent solvent evaporation. The results reveal multistage nanoscale ordering of the Au nanoparticles during the spray cycle. Further ex situ atomic force microscopy measurements of the sprayed films showed the formation of Au monolayer islands on top of the polymer film. Our study suggests that the solvent-substrate interaction as well as solvent evaporation kinetics are important factors that need to be taken into consideration in order to grow a compact uniform monolayer film for the fabrication of ultrathin films using airbrush deposition.
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Affiliation(s)
- M Al-Hussein
- Department of Physics, The University of Jordan, Amman 11942, Jordan.
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10
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Liu HT, Zeng XF, Zhao H, Chen JF. Highly Transparent and Multifunctional Polymer Nanohybrid Film with Superhigh ZnO Content Synthesized by a Bulk Polymerization Method. Ind Eng Chem Res 2012. [DOI: 10.1021/ie300425v] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Hai-Tao Liu
- State
Key Laboratory of Organic−Inorganic Composites and ‡Research Center
of the Ministry of Education for High Gravity Engineering and Technology, Beijing University of Chemical Technology, Beijing 100029, P.R. China
| | - Xiao-Fei Zeng
- State
Key Laboratory of Organic−Inorganic Composites and ‡Research Center
of the Ministry of Education for High Gravity Engineering and Technology, Beijing University of Chemical Technology, Beijing 100029, P.R. China
| | - Hong Zhao
- State
Key Laboratory of Organic−Inorganic Composites and ‡Research Center
of the Ministry of Education for High Gravity Engineering and Technology, Beijing University of Chemical Technology, Beijing 100029, P.R. China
| | - Jian-Feng Chen
- State
Key Laboratory of Organic−Inorganic Composites and ‡Research Center
of the Ministry of Education for High Gravity Engineering and Technology, Beijing University of Chemical Technology, Beijing 100029, P.R. China
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11
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Jiang G, Hore MJA, Gam S, Composto RJ. Gold nanorods dispersed in homopolymer films: optical properties controlled by self-assembly and percolation of nanorods. ACS NANO 2012; 6:1578-1588. [PMID: 22283716 DOI: 10.1021/nn2045449] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
In this paper, polymer nanocomposite films containing gold nanorods (AuNRs) and poly(2-vinyl pyridine) (P2VP) have been investigated for their structure-optical property relationship. Using transmission electron microscopy (TEM), the assembly of AuNRs (7.9 nm × 28.4 nm) grafted with a P2VP brush in P2VP films is examined as a function of the AuNR volume fraction Ø(AuNRs) and film thickness h. For h ∼ 40 nm, AuNRs are confined to align parallel to the film and uniformly dispersed at low Ø(AuNRs). Upon increasing Ø(AuNRs), nanorods form discrete aggregates containing mainly side-by-side arrays due to depletion-attraction forces. For Ø(AuNRs) = 2.7%, AuNRs assemble into a 2D network where the discrete aggregates are connected by end-to-end linked nanorods. As Ø(AuNRs) further increases, the polymer-rich regions of the network fill in with nanorods and rod overlap is observed. Monte Carlo simulations capture the experimentally observed morphologies. The effect of film thickness is investigated at Ø(AuNRs) = 2.7%, where thicker films (40 and 70 nm) show a dense array of percolated nanorods and thinner films (20 nm) exhibit mainly isolated nanorods. Using Rutherford backscattering spectrometry (RBS), the AuNRs are observed to segregate near the substrate during spin-casting. Optically, the longitudinal surface plasmon resonance (LSPR) peaks are correlated with the local orientation of the AuNRs, where side-by-side and end-to-end alignments induce blue and red shifts, respectively. The LSPR undergoes a red shift up to 51 nm as Ø(AuNRs) increases from 1.6 to 2.7%. These studies indicate that the optical properties of polymer nanocomposite films containing gold nanorods can be fine-tuned by changing Ø(AuNRs) and h. These results are broadly applicable and provide guidelines for dispersing other functional nanoparticles, such as quantum dots and carbon nanotubes.
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Affiliation(s)
- Guoqian Jiang
- Department of Materials Science and Engineering and Laboratory for Research on the Structure of Matter, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6272, United States
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12
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Wu W, Xiao X, Zhang S, Ren F, Jiang C. Facile method to synthesize magnetic iron oxides/TiO2 hybrid nanoparticles and their photodegradation application of methylene blue. NANOSCALE RESEARCH LETTERS 2011; 6:533. [PMID: 21961891 PMCID: PMC3212071 DOI: 10.1186/1556-276x-6-533] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2011] [Accepted: 09/30/2011] [Indexed: 05/03/2023]
Abstract
Many methods have been reported to improving the photocatalytic efficiency of organic pollutant and their reliable applications. In this work, we propose a facile pathway to prepare three different types of magnetic iron oxides/TiO2 hybrid nanoparticles (NPs) by seed-mediated method. The hybrid NPs are composed of spindle, hollow, and ultrafine iron oxide NPs as seeds and 3-aminopropyltriethyloxysilane as linker between the magnetic cores and TiO2 layers, respectively. The composite structure and the presence of the iron oxide and titania phase have been confirmed by transmission electron microscopy, X-ray diffraction, and X-ray photoelectron spectra. The hybrid NPs show good magnetic response, which can get together under an external applied magnetic field and hence they should become promising magnetic recovery catalysts (MRCs). Photocatalytic ability examination of the magnetic hybrid NPs was carried out in methylene blue (MB) solutions illuminated under Hg light in a photochemical reactor. About 50% to 60% of MB was decomposed in 90 min in the presence of magnetic hybrid NPs. The synthesized magnetic hybrid NPs display high photocatalytic efficiency and will find recoverable potential applications in cleaning polluted water with the help of magnetic separation.
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Affiliation(s)
- Wei Wu
- Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education, Wuhan University, Wuhan 430072, People's Republic of China
- Center for Electron Microscopy and School of Physics and Technology, Wuhan University, Wuhan 430072, People's Republic of China
- School of Printing and Packaging, Wuhan University, Wuhan 430079, People's Republic of China China
| | - Xiangheng Xiao
- Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education, Wuhan University, Wuhan 430072, People's Republic of China
- Center for Electron Microscopy and School of Physics and Technology, Wuhan University, Wuhan 430072, People's Republic of China
| | - Shaofeng Zhang
- Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education, Wuhan University, Wuhan 430072, People's Republic of China
- Center for Electron Microscopy and School of Physics and Technology, Wuhan University, Wuhan 430072, People's Republic of China
| | - Feng Ren
- Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education, Wuhan University, Wuhan 430072, People's Republic of China
- Center for Electron Microscopy and School of Physics and Technology, Wuhan University, Wuhan 430072, People's Republic of China
| | - Changzhong Jiang
- Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education, Wuhan University, Wuhan 430072, People's Republic of China
- Center for Electron Microscopy and School of Physics and Technology, Wuhan University, Wuhan 430072, People's Republic of China
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13
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Improvement of thermal stability of poly(methyl methacrylate) by incorporation of colloidal TiO2 nanorods. Polym Degrad Stab 2011. [DOI: 10.1016/j.polymdegradstab.2011.03.020] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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14
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Roth SV, Herzog G, Körstgens V, Buffet A, Schwartzkopf M, Perlich J, Abul Kashem MM, Döhrmann R, Gehrke R, Rothkirch A, Stassig K, Wurth W, Benecke G, Li C, Fratzl P, Rawolle M, Müller-Buschbaum P. In situ observation of cluster formation during nanoparticle solution casting on a colloidal film. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2011; 23:254208. [PMID: 21654049 DOI: 10.1088/0953-8984/23/25/254208] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
We present a real-time study of the nanostructuring and cluster formation of gold nanoparticles deposited in aqueous solution on top of a pre-structured polystyrene colloidal thin film. Cluster formation takes place at different length scales, from the agglomerations of the gold nanoparticles to domains of polystyrene colloids. By combining in situ imaging ellipsometry and microbeam grazing incidence small-angle x-ray scattering, we are able to identify different stages of nanocomposite formation, namely diffusion, roughness increase, layer build-up and compaction. The findings can serve as a guideline for nanocomposite tailoring by solution casting.
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Affiliation(s)
- S V Roth
- Deutsches Elektronen-Synchrotron (DESY), Notkestrabe, Hamburg, Germany.
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15
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Patra N, Barone AC, Salerno M. Solvent effects on the thermal and mechanical properties of poly(methyl methacrylate) casted from concentrated solutions. ADVANCES IN POLYMER TECHNOLOGY 2011. [DOI: 10.1002/adv.20203] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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16
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Shishino Y, Yonezawa T, Udagawa S, Hase K, Nishihara H. Preparation of Optical Resins Containing Dispersed Gold Nanoparticles by the Matrix Sputtering Method. Angew Chem Int Ed Engl 2010. [DOI: 10.1002/ange.201005723] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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17
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Shishino Y, Yonezawa T, Udagawa S, Hase K, Nishihara H. Preparation of Optical Resins Containing Dispersed Gold Nanoparticles by the Matrix Sputtering Method. Angew Chem Int Ed Engl 2010; 50:703-5. [DOI: 10.1002/anie.201005723] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2010] [Indexed: 11/06/2022]
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18
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Torres-Torres D, Trejo-Valdez M, Castañeda L, Torres-Torres C, Tamayo-Rivera L, Fernández-Hernández RC, Reyes-Esqueda JA, Muñoz-Saldaña J, Rangel-Rojo R, Oliver A. Inhibition of the two-photon absorption response exhibited by a bilayer TiO2 film with embedded Au nanoparticles. OPTICS EXPRESS 2010; 18:16406-16417. [PMID: 20721027 DOI: 10.1364/oe.18.016406] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
We use two different synthesis approaches for the preparation of TiO(2) films in order to study their resulting third order optical nonlinearity, and its modification by the inclusion of Au nanoparticles in one of the samples. An ultrasonic spray pyrolysis method was used for preparing a TiO(2) film in which we found two-photon absorption as a dominant nonlinear effect for 532 nm and 26 ps pulses; and a purely electronic nonlinearity at 830 nm for 80 fs pulses. A strong optical Kerr effect and the inhibition of the nonlinear optical absorption in 532 nm can be obtained for the first sample if Au nanoparticles embedded in a second TiO(2) film prepared by a sol-gel technique are added to it. We used an optical Kerr gate, z-scan, a multi-wave mixing experiment and an input-output transmittance experiment for measuring the optical nonlinearities.
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Affiliation(s)
- D Torres-Torres
- Centro de Investigación y Estudios Avanzados del IPN Unidad Querétaro,76001 Querétaro, Qro, México.
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19
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Fragouli D, Buonsanti R, Bertoni G, Sangregorio C, Innocenti C, Falqui A, Gatteschi D, Cozzoli PD, Athanassiou A, Cingolani R. Dynamical formation of spatially localized arrays of aligned nanowires in plastic films with magnetic anisotropy. ACS NANO 2010; 4:1873-1878. [PMID: 20356062 DOI: 10.1021/nn901597a] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
We present a simple technique for magnetic-field-induced formation, assembling, and positioning of magnetic nanowires in a polymer film. Starting from a polymer/iron oxide nanoparticle casted solution that is allowed to dry along with the application of a weak magnetic field, nanocomposite films incorporating aligned nanocrystal-built nanowire arrays are obtained. The control of the dimensions of the nanowires and of their localization across the polymer matrix is achieved by varying the duration of the applied magnetic field, in combination with the evaporation dynamics. These multifunctional anisotropic free-standing nanocomposite films, which demonstrate high magnetic anisotropy, can be used in a wide field of technological applications, ranging from sensors to microfluidics and magnetic devices.
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Affiliation(s)
- Despina Fragouli
- Center for Bio-Molecular Nanotechnologies (CBN) of IIT@NNL-UniLe-Lecce, via Barsanti c/o STAMMS, Arnesano 73010 Lecce, Italy.
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20
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Colloidal Inorganic Nanocrystal Based Nanocomposites: Functional Materials for Micro and Nanofabrication. MATERIALS 2010. [PMCID: PMC5513470 DOI: 10.3390/ma3021316] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The unique size- and shape-dependent electronic properties of nanocrystals (NCs) make them extremely attractive as novel structural building blocks for constructing a new generation of innovative materials and solid-state devices. Recent advances in material chemistry has allowed the synthesis of colloidal NCs with a wide range of compositions, with a precise control on size, shape and uniformity as well as specific surface chemistry. By incorporating such nanostructures in polymers, mesoscopic materials can be achieved and their properties engineered by choosing NCs differing in size and/or composition, properly tuning the interaction between NCs and surrounding environment. In this contribution, different approaches will be presented as effective opportunities for conveying colloidal NC properties to nanocomposite materials for micro and nanofabrication. Patterning of such nanocomposites either by conventional lithographic techniques and emerging patterning tools, such as ink jet printing and nanoimprint lithography, will be illustrated, pointing out their technological impact on developing new optoelectronic and sensing devices.
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21
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Tu Y, Zhou L, Jin YZ, Gao C, Ye ZZ, Yang YF, Wang QL. Transparent and flexible thin films of ZnO-polystyrene nanocomposite for UV-shielding applications. ACTA ACUST UNITED AC 2010. [DOI: 10.1039/b914156a] [Citation(s) in RCA: 161] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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22
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Capozzi CJ, Ivanov IN, Joshi S, Gerhardt RA. The effect of the atmosphere on the optical properties of as-synthesized colloidal indium tin oxide. NANOTECHNOLOGY 2009; 20:145701. [PMID: 19420531 DOI: 10.1088/0957-4484/20/14/145701] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
The optical properties of indium tin oxide (ITO) have often been explored when it is in the form of deposited thin films. In this study, a colloidal chemistry approach is taken to investigate the influence of the atmosphere on the optical properties of ITO nanoparticles. X-ray diffraction (XRD), transmission electron microscopy (TEM), absorption spectroscopy and photoluminescence (PL) were used to characterize colloidal ITO samples, synthesized under aerated and inert conditions, with the same composition. In both cases, the ITO can be completely dispersed in a non-polar solvent without any evidence of agglomeration. For the ITO made in air, the nanoparticle-solvent solution exhibits a pale green color, and XRD and TEM indicate an average particle size of approximately 7 nm and small shrinkage in the lattice structure. When the ITO is synthesized under inert conditions, the solution turns blue, and XRD and TEM indicate an average particle size of approximately 8 nm and even less strain in the lattice than for the ITO synthesized under aerated conditions. The change in color and lattice strain is attributed to the difference in oxygen vacancy concentration for the ITO nanoparticles synthesized under aerated and inert conditions, which exhibit different optical band gap values of 3.89 eV and 4.05 eV, respectively. Our work here shows that thin film deposition or sintering steps may not be required for studying the optical properties of as-synthesized ITO nanoparticles.
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Affiliation(s)
- Charles J Capozzi
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA 30332-0245, USA
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Lü C, Yang B. High refractive index organic–inorganic nanocomposites: design, synthesis and application. ACTA ACUST UNITED AC 2009. [DOI: 10.1039/b816254a] [Citation(s) in RCA: 310] [Impact Index Per Article: 20.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Convertino A, Leo G, Striccoli M, Di Marco G, Curri ML. Effect of shape and surface chemistry of TiO2 colloidal nanocrystals on the organic vapor absorption capacity of TiO2/PMMA composite. POLYMER 2008. [DOI: 10.1016/j.polymer.2008.09.069] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Meuer S, Fischer K, Mey I, Janshoff A, Schmidt M, Zentel R. Liquid Crystals from Polymer-Functionalized TiO2 Nanorod Mesogens. Macromolecules 2008. [DOI: 10.1021/ma801369w] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- S. Meuer
- Institute for Organic Chemistry, University of Mainz, Duesbergweg 10-14, 55128 Mainz, Germany, and Institute for Physical Chemistry, University of Mainz, Jakob Welder Weg 11, 55128 Mainz, Germany
| | - K. Fischer
- Institute for Organic Chemistry, University of Mainz, Duesbergweg 10-14, 55128 Mainz, Germany, and Institute for Physical Chemistry, University of Mainz, Jakob Welder Weg 11, 55128 Mainz, Germany
| | - I. Mey
- Institute for Organic Chemistry, University of Mainz, Duesbergweg 10-14, 55128 Mainz, Germany, and Institute for Physical Chemistry, University of Mainz, Jakob Welder Weg 11, 55128 Mainz, Germany
| | - A. Janshoff
- Institute for Organic Chemistry, University of Mainz, Duesbergweg 10-14, 55128 Mainz, Germany, and Institute for Physical Chemistry, University of Mainz, Jakob Welder Weg 11, 55128 Mainz, Germany
| | - M. Schmidt
- Institute for Organic Chemistry, University of Mainz, Duesbergweg 10-14, 55128 Mainz, Germany, and Institute for Physical Chemistry, University of Mainz, Jakob Welder Weg 11, 55128 Mainz, Germany
| | - R. Zentel
- Institute for Organic Chemistry, University of Mainz, Duesbergweg 10-14, 55128 Mainz, Germany, and Institute for Physical Chemistry, University of Mainz, Jakob Welder Weg 11, 55128 Mainz, Germany
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