1
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Wang C, Matta SK, Ng CK, Cao C, Sharma M, Chesman ASR, Russo SP, Jasieniak JJ. Direct synthesis of CsPbX 3 perovskite nanocrystal assemblies. NANOSCALE 2024; 16:614-623. [PMID: 38086654 DOI: 10.1039/d3nr04285e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/04/2024]
Abstract
Inorganic CsPbX3 (X = Cl, Br, I) perovskite nanocrystals (NCs) possess many advantageous optoelectronic properties, making them an attractive candidate for light emitting diodes, lasers, or photodetector applications. Such perovskite NCs can form extended assemblies that further modify their bandgap and emission wavelength. In this article, a facile direct synthesis of CsPbX3 NC assemblies that are 1 μm in size and are composed of 10 nm-sized NC building blocks is reported. The direct synthesis of these assemblies with a conventional hot-injection method of the NCs is achieved through the judicious selection of the solvent, ligands, and reaction stoichiometry. Only under selective reaction conditions where the surface ligand environment is tuned to enhance the hydrophobic interactions between ligand chains of neighbouring NCs is self-assembly achieved. These assemblies possess narrow and red-shifted photoluminescence compared to their isolated NC counterparts, which further expands the colour gamut that can be rendered from inorganic perovskites. This is demonstrated through simple down-converting light emitters.
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Affiliation(s)
- Chujie Wang
- ARC Centre of Excellence in Exciton Science, Department of Materials Science and Engineering, Monash University, Clayton, Victoria 3800, Australia.
| | - Sri K Matta
- ARC Centre of Excellence in Exciton Science, School of Science, RMIT University, Melbourne 3000, Australia
- Center for Computational Sciences, University of Tsukuba, Japan
| | - Chun Kiu Ng
- ARC Centre of Excellence in Exciton Science, Department of Materials Science and Engineering, Monash University, Clayton, Victoria 3800, Australia.
| | - Chang Cao
- ARC Centre of Excellence in Exciton Science, Department of Materials Science and Engineering, Monash University, Clayton, Victoria 3800, Australia.
| | - Manoj Sharma
- ARC Centre of Excellence in Exciton Science, Department of Materials Science and Engineering, Monash University, Clayton, Victoria 3800, Australia.
| | - Anthony S R Chesman
- CSIRO Manufacturing, Ian Wark Laboratories, Research Way, Clayton, VIC 3168, Australia
| | - Salvy P Russo
- ARC Centre of Excellence in Exciton Science, School of Science, RMIT University, Melbourne 3000, Australia
| | - Jacek J Jasieniak
- ARC Centre of Excellence in Exciton Science, Department of Materials Science and Engineering, Monash University, Clayton, Victoria 3800, Australia.
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2
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Barry DE, Kitchen JA, Mercs L, Peacock RD, Albrecht M, Gunnlaugsson T. Chiral luminescent lanthanide complexes possessing strong (samarium, Sm III) circularly polarised luminescence (CPL), and their self-assembly into Langmuir-Blodgett films. Dalton Trans 2019; 48:11317-11325. [PMID: 31271402 DOI: 10.1039/c9dt02003a] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
The lanthanide directed self-assembly of chiral amphiphilic 2,6-pyridinedicarboxylic acid based ligands 1 and 2 with various Ln(CF3SO3)3 (Ln = TbIII, SmIII, LuIII, DyIII) salts was studied in CH3CN and evaluated with the expected 1 : 3 and 1 : 1 Ln : Ligand species forming in solution. Ligand chirality was retained and transferred, as depicted by circular dichroism (CD) and circularly polarised luminescence (CPL) measurements (for TbIII and SmIII), to the lanthanide centre upon complexation with high dissymmetry factor values for the SmIII complexes obtained (glum = -0.44 and 0.29 and 0.45 and -0.23 for the 4G5/2→6H5/2 and the 4G5/2→6H7/2 transitions of Sm·13 and Sm·23, respectively). The ability of the complexes to form stable Langmuir monolayers at the air-water interface was also established while Langmuir-Blodgett films of Tb·L3 and Sm·L3 exhibited lanthanide luminescent emission.
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Affiliation(s)
- Dawn E Barry
- School of Chemistry and Trinity Biomedical Sciences Institute (TBSI), Trinity College Dublin, The University of Dublin, Dublin 2, Ireland.
| | - Jonathan A Kitchen
- Chemistry, School of Natural and Computational Sciences, Massey University, Auckland, New Zealand
| | - Laszlo Mercs
- School of Chemistry and Chemical Biology, University College Dublin, Belfield, Dublin 4, Ireland
| | - Robert D Peacock
- School of Chemistry, University of Glasgow, Glasgow, G 12 8QQ, Scotland, UK
| | - Martin Albrecht
- School of Chemistry and Chemical Biology, University College Dublin, Belfield, Dublin 4, Ireland
| | - Thorfinnur Gunnlaugsson
- School of Chemistry and Trinity Biomedical Sciences Institute (TBSI), Trinity College Dublin, The University of Dublin, Dublin 2, Ireland.
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3
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Bazán-Díaz L, Mendoza-Cruz R, Velázquez-Salazar JJ, Plascencia-Villa G, Ascencio-Aguirre FM, Ojeda-Galván HJ, Herrera-Becerra R, Guisbiers G, José-Yacamán M. Synthesis and Properties of the Self-Assembly of Gold-Copper Nanoparticles into Nanoribbons. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:9394-9401. [PMID: 30011365 DOI: 10.1021/acs.langmuir.7b04187] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
We report the efficient wet-chemical production of self-assembled gold-copper bimetallic nanoparticles (diameter of ∼2 nm) into two-dimensional flexible ribbonlike nanostructures. The direct observation of a layered arrangement of particles into nanoribbons was provided through high-resolution transmission electron microscopy and electron tomography. These nanoribbons showed photoluminesce and efficient photocatalytic activity for the conversion of 4-nitrophenol. The thermal stability of the nanoribbons was also measured by in situ heat treatment in the electron microscope, confirming that the self-assembled gold-copper nanoribbons efficiently supported up to 350 °C. The final morphology of the nanoparticles and their ability to self-assemble into flexible nanoribbons were dependent on concentration and the ratio of precursors. Therefore, these experimental factors were discussed. Remarkably, the presence of copper was found to be critical to triggering the self-assembly of nanoparticles into ordered layered structures. These results for the synthesis and stability of self-assemblies of metallic nanoparticles present a potential extension of the method to producing materials with catalytic applications.
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Affiliation(s)
- Lourdes Bazán-Díaz
- Department of Physics & Astronomy , University of Texas at San Antonio , One UTSA Circle , San Antonio , Texas 78249 , United States
| | - Rubén Mendoza-Cruz
- Department of Physics & Astronomy , University of Texas at San Antonio , One UTSA Circle , San Antonio , Texas 78249 , United States
| | - J Jesús Velázquez-Salazar
- Department of Physics & Astronomy , University of Texas at San Antonio , One UTSA Circle , San Antonio , Texas 78249 , United States
| | - Germán Plascencia-Villa
- Department of Physics & Astronomy , University of Texas at San Antonio , One UTSA Circle , San Antonio , Texas 78249 , United States
| | - Francisco Miguel Ascencio-Aguirre
- Institute of Physics, Universidad Nacional Autónoma de México, Circuito de la Investigación Científica s/n, Col. Ciudad Universitaria , Coyoacán D. F., C.P. 04510 , México
| | - H Joazet Ojeda-Galván
- Coordinación para la Innovación y la Aplicación de la Ciencia y la Tecnología (CIACYT), Universidad Autónoma de San Luis Potosí (UASLP) , Álvaro Obregón 64 , 78000 San Luis Potosí , México
| | - Raúl Herrera-Becerra
- Institute of Physics, Universidad Nacional Autónoma de México, Circuito de la Investigación Científica s/n, Col. Ciudad Universitaria , Coyoacán D. F., C.P. 04510 , México
| | - Grégory Guisbiers
- Department of Physics & Astronomy , University of Arkansas at Little Rock , 2801 South University Avenue , Little Rock , Arkansas 72204 , United States
| | - Miguel José-Yacamán
- Department of Physics & Astronomy , University of Texas at San Antonio , One UTSA Circle , San Antonio , Texas 78249 , United States
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4
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Pei M, Park KH, Jang M, Lee SB, Ahn J, Kim YH, Yang H. Control of consistent ordering in π-conjugated polymer films for organic field-effect transistor applications. RSC Adv 2016. [DOI: 10.1039/c6ra14677e] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A conjugated copolymer, pDPP-(TV)2B-2DO, including donor and acceptor blocks of 1,4-bis((E)-2-(thiophen-2-yl)vinyl)benzene and diketopyrrolopyrrole derivatives, respectively, was synthesized for organic field-effect transistor applications.
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Affiliation(s)
- Mingyuan Pei
- Department of Applied Organic Materials Engineering
- Inha University
- Incheon 22212
- Korea
| | - Kwang Hun Park
- Department of Polymer Science and Engineering
- Gyeongsang National University
- Jinju 52828
- Korea
| | - Mi Jang
- Department of Applied Organic Materials Engineering
- Inha University
- Incheon 22212
- Korea
| | - Sang Bong Lee
- Department of Chemistry
- Gyeongsang National University
- Research Institute of Nature Science (RINS)
- Jinju 52828
- Korea
| | - Joongyu Ahn
- Department of Applied Organic Materials Engineering
- Inha University
- Incheon 22212
- Korea
| | - Yun-Hi Kim
- Department of Chemistry
- Gyeongsang National University
- Research Institute of Nature Science (RINS)
- Jinju 52828
- Korea
| | - Hoichang Yang
- Department of Applied Organic Materials Engineering
- Inha University
- Incheon 22212
- Korea
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5
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Doig M, Camp PJ. The structures of hexadecylamine films adsorbed on iron-oxide surfaces in dodecane and hexadecane. Phys Chem Chem Phys 2015; 17:5248-55. [DOI: 10.1039/c4cp05837b] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
The structure and friction of hexadecylamine surfactant films on iron oxide in alkanes are studied using large-scale molecular-dynamics simulations.
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Affiliation(s)
- Michael Doig
- School of Chemistry
- University of Edinburgh
- Edinburgh
- UK
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6
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Wood MH, Welbourn RL, Charlton T, Zarbakhsh A, Casford MT, Clarke SM. Hexadecylamine adsorption at the iron oxide-oil interface. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2013; 29:13735-13742. [PMID: 24106786 PMCID: PMC3850247 DOI: 10.1021/la4018147] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/14/2013] [Revised: 10/03/2013] [Indexed: 05/28/2023]
Abstract
The adsorption behavior of a model additive, hexadecylamine, onto an iron surface from hexadecane oil has been characterized using polarized neutron reflectometry, sum-frequency generation spectroscopy, solution depletion isotherm, and X-ray photoelectron spectroscopy (XPS). The amine showed a strong affinity for the metal surface, forming a dense monolayer at relatively low concentrations; a layer thickness of 16 (±3) Å at low concentrations, increasing to 20 (±3) Å at greater amine concentrations, was determined from the neutron data. These thicknesses suggest that the molecules in the layer are tilted. Adsorption was also indicated by sum-frequency generation spectroscopy and XPS, the latter indicating that the most dominant amine-surface interaction was via electron donation from the nitrogen lone pair to the positively charged iron ions. Sum-frequency generation spectroscopy was used to determine the alkyl chain conformation order and orientation on the surface.
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Affiliation(s)
- Mary H. Wood
- Department
of Chemistry and BP Institute, Cambridge
University, Cambridge CB2 1EW, United Kingdom
| | - Rebecca
J. L. Welbourn
- Department
of Chemistry and BP Institute, Cambridge
University, Cambridge CB2 1EW, United Kingdom
| | - Timothy Charlton
- ISIS, Rutherford Appleton Laboratory, Didcot OX11 0QX, United Kingdom
| | - Ali Zarbakhsh
- School
of Biological and Chemical Science, Queen
Mary University of London, Joseph Priestly Building, Mile End Road, London E1 4NS, United Kingdom
| | - M. T. Casford
- Department
of Chemistry and BP Institute, Cambridge
University, Cambridge CB2 1EW, United Kingdom
| | - Stuart M. Clarke
- Department
of Chemistry and BP Institute, Cambridge
University, Cambridge CB2 1EW, United Kingdom
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7
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Zhai R, Zhang B, Liu L, Xie Y, Zhang H, Liu J. Immobilization of enzyme biocatalyst on natural halloysite nanotubes. CATAL COMMUN 2010. [DOI: 10.1016/j.catcom.2010.09.030] [Citation(s) in RCA: 153] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
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8
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Sołoducho J, Cabaj J, Swist A. Structure and sensor properties of thin ordered solid films. SENSORS 2009; 9:7733-52. [PMID: 22408477 PMCID: PMC3292080 DOI: 10.3390/s91007733] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/28/2009] [Revised: 09/09/2009] [Accepted: 09/09/2009] [Indexed: 12/03/2022]
Abstract
Miniaturized gas sensors and biosensors based on nanostructured sensing elements have attracted considerable interest because these nanostructured materials can be used to significantly improve sensor sensitivity and the response time. We report here on a generic, reversible sensing platform based on hybrid nanofilms. Thin ordered Langmuir-Blodgett (LB) films built of fluorene derivatives were used as effective gas sensors for both oxidative and reductive analytes. A novel immobilization method based on thin LB films as a matrix has been developed for construction of sensing protein layers. Biomolecules can often be incorporated into and immobilized on Langmuir-Blodgett films using adsorption methods or by covalent immobilization of proteins. The sensor sensitisation was achieved by an amphiphilic N-alkyl-bis(thiophene)arylenes admixed into the film. The interlaced derivative was expected to facilitate the electron transfer, thereby enhancing the sensor sensitivity. The results suggest that this may be very promising approach for exploring the interactions between proteins and high throughput detection of phenol derivatives in wastewater.
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Affiliation(s)
- Jadwiga Sołoducho
- Department of Medicinal Chemistry and Microbiology, Faculty of Chemistry, Wrocław University of Technology, Wybrzeże Wyspiańskiego 27, 50-370 Wrocław, Poland; E-Mails: (J.C.); (A.S.)
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9
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Using phospholipid Langmuir and Langmuir–Blodgett films as matrix for urease immobilization. J Colloid Interface Sci 2008; 319:100-8. [DOI: 10.1016/j.jcis.2007.12.007] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2007] [Revised: 12/06/2007] [Accepted: 12/06/2007] [Indexed: 11/18/2022]
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10
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de Jongh HHJ, Meinders MBJ. Proteins at air-water interfaces studied using external reflection circular dichroism. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2002; 58:3197-3204. [PMID: 12511104 DOI: 10.1016/s1386-1425(02)00099-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
In this report we describe the first attempts to record external reflection circular dichroism (ERCD) spectra of beta-lactoglobulin solutions. It is shown that the accumulated proteins at and near the air-water interface can be detected using ERCD and that the signals obtained contain information on the conformational properties and concentration of the proteins residing at the interface. The local protein concentration and its conformation are in full agreement with previous observations using external reflection infrared spectroscopy. The ERCD signals are dominated by linear dichroism (LD) due to non-ideal behavior of the instrumental optics, but can be explained for using the theoretical description of chiral reflection. This allows the analysis of ERCD spectra of protein solutions. The measured ERCD signals are described accurately in the region between 190 and 220 nm, but poor resemblance is obtained at higher wavelengths. We are however confident that improvement of experimental conditions and theoretical description will allow that in the near future, external reflection circular dichroism (CD) can be a valuable tool that complements the application of external reflection infrared spectroscopy to study interfacial systems.
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Affiliation(s)
- Harmen H J de Jongh
- Wageningen Centre for Food Sciences, Department of Biopolymer Stability and Functionality, Diedenweg 20, Wageningen, The Netherlands.
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11
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Surface-sensitive X-ray and neutron scattering characterization of planar lipid model membranes and lipid/peptide interactions. PEPTIDE-LIPID INTERACTIONS 2002. [DOI: 10.1016/s1063-5823(02)52007-x] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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12
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Schalke M, Lösche M. Structural models of lipid surface monolayers from X-ray and neutron reflectivity measurements. Adv Colloid Interface Sci 2000; 88:243-74. [PMID: 11185700 DOI: 10.1016/s0001-8686(00)00047-6] [Citation(s) in RCA: 77] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
Structural investigations of phospholipid monolayers on aqueous subphases on the submolecular level using X-ray and neutron reflectivity measurements are reviewed. While such investigations have been limited in the past by a relatively restricted accessible momentum transfer range, recent developments in synchrotron technology--almost doubling this range--have considerably improved the capabilities of the technique. Until recently, data interpretation has entirely relied on 'box models' which describe the structures as molecularly homogeneous slabs--one hydrophobic and one hydrophilic. It is shown that box models of phospholipid monolayers are rather inadequate to model data at the high momentum transfer available nowadays in X-ray measurements. As an alternative, a hybrid data inversion strategy is proposed that treats the hydrophobic alkane phase as a homogeneous slab and describes the position of submolecular fragments of the lipid headgroups by means of distribution functions along the interface. Within this approach, composition-space refinement--enabling the coupling of data sets from various X-ray and neutron contrasts--in connection with volumetric constraints enables structural characterization of lipid monolayers in unprecedented detail. Extending a recent characterization of dimyristoylphosphatidic acid (DMPA) monolayers on pure water [Schalke et al., Biochim. Biophys. Acta 1464 (2000) 113-126] it is shown that stoichiometric binding of the divalent cations--DMPA-:Cat2+= 2:1--occurs only at exceedingly low areas per molecule, A lipid. At low surface pressure pi, both cations and anions are incorporated into the headgroup in significant amounts, approximately 0.68 Ba2+ and approximately 0.35 Cl- per PA molecule at pi = 2 mN m(-1). They are continuously squeezed out upon compression, until upon approaching Alipid = 41 A2, the stoichiometric ratio between bound cations and acidic headgroups is observed. The average inclination angle alpha of the headgroups as well as their water content is constant along the whole isotherm. The intrinsic contribution to the distribution width--i.e. the spread that is due to a distribution of the fragments within the headgroup without the action of capillary waves--increases with compression up to pi approximately 30 mN m(-1) and drops sharply thereafter in a regime of the isotherm where Alipid approaches its limiting value. The same general picture is observed for DMPA on subphases with 10 mM Ca2+, although the lower electron density of that cation limits the precision of the results.
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Affiliation(s)
- M Schalke
- Leipzig University, Institute of Experimental Physics I, Germany
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