1
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Liu Y, McNaughter PD, Liu X, Kretinin AV, Skelton JM, Azough F, Lewis DJ, Freer R. Exceptional Thermoelectric Performance of Cu 2(Zn,Fe,Cd)SnS 4 Thin Films. ACS Appl Mater Interfaces 2024; 16:11516-11527. [PMID: 38391145 PMCID: PMC10921374 DOI: 10.1021/acsami.3c17730] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/26/2023] [Revised: 02/07/2024] [Accepted: 02/08/2024] [Indexed: 02/24/2024]
Abstract
High-quality Cu2(Zn,Fe,Cd)SnS4 (CZFCTS) thin films based on the parent CZTS were prepared by aerosol-assisted chemical vapor deposition (AACVD). Substitution of Zn by Fe and Cd significantly improved the electrical transport properties, and monophasic CZFCTS thin films exhibited a maximum power factor (PF) of ∼0.22 μW cm-1 K-2 at 575 K. The quality and performance of the CZFCTS thin films were further improved by postdeposition annealing. CZFCTS thin films annealed for 24 h showed a significantly enhanced maximum PF of ∼2.4 μW cm-1 K-2 at 575 K. This is higher than all reported values for single-phase quaternary sulfide (Cu2BSnS4, B = Mn, Fe, Co, Ni) thin films and even exceeds the PF for most polycrystalline bulk materials of these sulfides. Density functional theory (DFT) calculations were performed to understand the impact of Cd and Fe substitution on the electronic properties of CZTS. It was predicted that CZFCTS would have a smaller band gap than CZTS and a higher density of states (DoS) near the Fermi level. The thermal conductivity and thermoelectric figure of merit (zT) of the CZFCTS thin films have been evaluated, yielding an estimated maximum zT range of 0.18-0.69 at 550 K. The simple processing route and improved thermoelectric performance make CZFCTS thin films extremely promising for thermoelectric energy generation.
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Affiliation(s)
- Yu Liu
- Department
of Materials, University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
| | - Paul D. McNaughter
- Department
of Chemistry, University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
| | - Xiaodong Liu
- Department
of Materials, University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
| | - Andrey V. Kretinin
- Department
of Materials, University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
- National
Graphene Institute, University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
| | - Jonathan M. Skelton
- Department
of Chemistry, University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
| | - Feridoon Azough
- Department
of Materials, University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
| | - David J. Lewis
- Department
of Materials, University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
| | - Robert Freer
- Department
of Materials, University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
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2
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Liu Y, McNaughter PD, Azough F, Liu X, Skelton JM, Kretinin AV, Lewis DJ, Freer R. Enhanced Thermoelectric Performance of Tin(II) Sulfide Thin Films Prepared by Aerosol Assisted Chemical Vapor Deposition. ACS Appl Energy Mater 2023; 6:4462-4474. [PMID: 37123105 PMCID: PMC10131136 DOI: 10.1021/acsaem.3c00608] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/07/2023] [Accepted: 03/17/2023] [Indexed: 05/03/2023]
Abstract
Orthorhombic SnS exhibits excellent thermoelectric performance as a consequence its relatively high Seebeck coefficient and low thermal conductivity. In the present work, polycrystalline orthorhombic SnS thin films were prepared by aerosol-assisted chemical vapor deposition (AACVD) using the single source precursor dibutyl-bis(diethyldithiocarbamato)tin(IV) [Sn(C4H9)2(S2CN(C2H5)2)2]. We examined the effects of the processing parameters on the composition, microstructure, and electrical transport properties of the SnS films. Deposition temperature dominates charge transport; the room temperature electrical conductivity increased from 0.003 to 0.19 S·cm-1 as deposition temperature increased from 375 to 445 °C. Similarly, the maximum power factor (PF) increased with deposition temperature, reaching ∼0.22 μW·cm-1·K-2 at 570 K. The power factors for SnS films deposited by AACVD are higher than values from earlier work on SnS bulks and SnS/SnSe films at temperatures up to 520 K. The electronic structure and electrical transport properties of SnS were investigated using density-functional theory to provide an improved understanding of the materials performance. To the best of our knowledge, the thermal conductivity (κ) of SnS film was measured for the first time allowing the figure of merit (zT) for SnS film to be evaluated. A relatively low thermal conductivity of ∼0.41 W·m-1·K-1 was obtained at 550 K for SnS films deposited at 445 °C; the corresponding zT value was ∼0.026. The SnS films are good candidates for thermoelectric applications and AACVD is a promising technique for the preparation of high-performance thermoelectric films.
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Affiliation(s)
- Yu Liu
- Department
of Materials, University of Manchester, Oxford Road, Manchester, M13 9PL, U.K.
| | - Paul D. McNaughter
- Department
of Chemistry, University of Manchester, Oxford Road, Manchester, M13 9PL, U.K.
| | - Feridoon Azough
- Department
of Materials, University of Manchester, Oxford Road, Manchester, M13 9PL, U.K.
| | - Xiaodong Liu
- Department
of Materials, University of Manchester, Oxford Road, Manchester, M13 9PL, U.K.
| | - Jonathan M. Skelton
- Department
of Chemistry, University of Manchester, Oxford Road, Manchester, M13 9PL, U.K.
| | - Andrey V. Kretinin
- Department
of Materials, University of Manchester, Oxford Road, Manchester, M13 9PL, U.K.
- National
Graphene Institute, University of Manchester, Oxford Road, Manchester, M13 9PL, U.K.
| | - David J. Lewis
- Department
of Materials, University of Manchester, Oxford Road, Manchester, M13 9PL, U.K.
| | - Robert Freer
- Department
of Materials, University of Manchester, Oxford Road, Manchester, M13 9PL, U.K.
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3
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Ward-O’Brien B, McNaughter PD, Cai R, Chattopadhyay A, Flitcroft JM, Smith CT, Binks DJ, Skelton JM, Haigh SJ, Lewis DJ. Quantum Confined High-Entropy Lanthanide Oxysulfide Colloidal Nanocrystals. Nano Lett 2022; 22:8045-8051. [PMID: 36194549 PMCID: PMC9614967 DOI: 10.1021/acs.nanolett.2c01596] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/20/2022] [Revised: 09/27/2022] [Indexed: 06/16/2023]
Abstract
We have synthesized the first reported example of quantum confined high-entropy (HE) nanoparticles, using the lanthanide oxysulfide, Ln2SO2, system as the host phase for an equimolar mixture of Pr, Nd, Gd, Dy, and Er. A uniform HE phase was achieved via the simultaneous thermolysis of a mixture of lanthanide dithiocarbamate precursors in solution. This was confirmed by powder X-ray diffraction and high-resolution scanning transmission electron microscopy, with energy dispersive X-ray spectroscopic mapping confirming the uniform distribution of the lanthanides throughout the particles. The nanoparticle dispersion displayed a significant blue shift in the absorption and photoluminescence spectra relative to our previously reported bulk sample with the same composition, with an absorption edge at 330 nm and a λmax at 410 nm compared to the absorption edge at 500 nm and a λmax at 450 nm in the bulk, which is indicative of quantum confinement. We support this postulate with experimental and theoretical analysis of the bandgap energy as a function of strain and surface effects (ligand binding) as well as calculation of the exciton Bohr radiii of the end member compounds.
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Affiliation(s)
- Brendan Ward-O’Brien
- Department
of Materials, University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
| | - Paul D. McNaughter
- Department
of Chemistry, University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
| | - Rongsheng Cai
- Department
of Materials, University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
| | - Amrita Chattopadhyay
- Department
of Chemistry, University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
| | - Joseph M. Flitcroft
- Department
of Chemistry, University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
| | - Charles T. Smith
- Department
of Physics and Astronomy and the Photon Science Institute, University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
| | - David J. Binks
- Department
of Physics and Astronomy and the Photon Science Institute, University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
| | - Jonathan M. Skelton
- Department
of Chemistry, University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
| | - Sarah J. Haigh
- Department
of Materials, University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
| | - David J. Lewis
- Department
of Materials, University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
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4
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Buckingham MA, Norton K, McNaughter PD, Whitehead G, Vitorica-Yrezabal I, Alam F, Laws K, Lewis DJ. Investigating the Effect of Steric Hindrance within CdS Single-Source Precursors on the Material Properties of AACVD and Spin-Coat-Deposited CdS Thin Films. Inorg Chem 2022; 61:8206-8216. [PMID: 35583220 PMCID: PMC9157504 DOI: 10.1021/acs.inorgchem.2c00616] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
![]()
Cadmium sulfide (CdS)
is an important semiconductor for electronic
and photovoltaic applications, particularly when utilized as a thin
film for window layers in CdTe solar cells. Deposition of thin-film
CdS through the decomposition of single-source precursors is an attractive
approach due to the facile, low-temperature, and rapid nature of this
approach. Tailoring the precursor to affect the decomposition properties
is commonly employed to tune desirable temperatures of decomposition.
However, altering the precursor structure and the effect this has
on the nature of the deposited material is an area far less commonly
investigated. Here, we seek to investigate this by altering the ligands
around the Cd metal center to increase the steric hindrance of the
precursor and investigate the effect this has on the decomposition
properties and the properties of deposited thin-film CdS from these
precursors. For this, we report the synthesis of four CdS precursors
with xanthate and pyridyl ligands ([Cd(n-ethyl xanthate)2(3-methyl pyridine)2] [1], [Cd(n-ethyl xanthate)2(3,5-lutidine)2] [2], [(Cd2(isopropyl xanthate)4(3-methyl
pyridine)2)n] [3], and [Cd(isopropyl xanthate)2(3,5-lutidine)2] [4]). These single-source precursors for CdS were
fully characterized by elemental analysis, NMR spectroscopy, single-crystal
X-ray diffraction (XRD), and thermogravimetric analysis. It was found
that even with subtle alterations in the xanthate (n-ethyl to isopropyl) and pyridine (3-methyl and 3,5-dimethyl) ligands,
a range of hexa-coordinate precursors were formed (two with cis configuration, one with trans configuration, and one
as a one-dimensional (1D) polymer). These four precursors were then
used in aerosol-assisted chemical vapor deposition (AACVD) and spin-coating
experiments to deposit eight thin films of CdS, which were characterized
by Raman spectroscopy, powder X-ray diffraction, and scanning electron
microscopy. Comparative quantitative information concerning film thickness
and surface roughness was also determined by atomic force microscopy.
Finally, the optical properties of all thin films were characterized
by ultraviolet–visible (UV–Vis) absorption spectroscopy,
from which the band gap of each deposited film was determined to be
commensurate with that of bulk CdS (ca. 2.4 eV). Four single-source CdS precursors were
synthesized based
on a combination of xanthate- and pyridyl-derived ligands to investigate
increasing the steric hindrance of the precursor. Two cis, one trans, and one 1D polymer complexes were developed.
These precursors were then deposited as thin films through both spin
coating and aerosol-assisted chemical vapor deposition techniques,
and the morphology, film thickness, film surface roughness, particle
size distribution, and band gap energy were assessed.
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Affiliation(s)
- Mark A Buckingham
- Department of Materials, The University of Manchester, Manchester M13 9PL, U.K
| | - Kane Norton
- Department of Materials, The University of Manchester, Manchester M13 9PL, U.K
| | - Paul D McNaughter
- Department of Chemistry, The University of Manchester, Manchester M13 9PL, U.K
| | - George Whitehead
- Department of Chemistry, The University of Manchester, Manchester M13 9PL, U.K
| | | | - Firoz Alam
- Department of Chemistry, The University of Manchester, Manchester M13 9PL, U.K
| | - Kristine Laws
- Department of Chemistry, King's College London, London SE1 1DB, U.K
| | - David J Lewis
- Department of Materials, The University of Manchester, Manchester M13 9PL, U.K
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5
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Ming SK, Taylor RA, McNaughter PD, Lewis DJ, O’Brien P. Tunable structural and optical properties of Ag xCu yInS 2 colloidal quantum dots. NEW J CHEM 2022. [DOI: 10.1039/d2nj03169h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Herein is discussed tunable absorption and emission properties of AgxCuyInS2 quantum dots involving wurtzite to chalcopyrite phase transformation dependent on Ag+ dopant content.
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Affiliation(s)
- Shanna-Kay Ming
- Department of Chemistry, The University of the West Indies, St. Augustine, Trinidad and Tobago
| | - Richard A. Taylor
- Department of Chemistry, The University of the West Indies, St. Augustine, Trinidad and Tobago
| | - Paul D. McNaughter
- Department of Chemistry, University of Manchester, Manchester M13 9PL, UK
| | - David J. Lewis
- Department of Materials, University of Manchester, Manchester M13 9PL, UK
| | - Paul O’Brien
- Department of Chemistry, University of Manchester, Manchester M13 9PL, UK
- Department of Materials, University of Manchester, Manchester M13 9PL, UK
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6
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Alanazi A, McNaughter PD, Alam F, Vitorica-yrezabal IJ, Whitehead GFS, Tuna F, O’Brien P, Collison D, Lewis DJ. Structural Investigations of α-MnS Nanocrystals and Thin Films Synthesized from Manganese(II) Xanthates by Hot Injection, Solvent-Less Thermolysis, and Doctor Blade Routes. ACS Omega 2021; 6:27716-27725. [PMID: 34722972 PMCID: PMC8552351 DOI: 10.1021/acsomega.1c02907] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/03/2021] [Accepted: 08/17/2021] [Indexed: 06/13/2023]
Abstract
Manganese(II) xanthate complexes of the form [Mn(S2COR)2(TMEDA)], where TMEDA = tetramethylethylenediamine and R = methyl (1), ethyl (2), n-propyl (3), n-butyl (4), n-pentyl (5), n-hexyl (6), and n-octyl (7), have been synthesized and structures elucidated using single-crystal X-ray diffraction. Complexes 1-7 were used as molecular precursors to synthesize manganese sulfide (MnS). Olelyamine-capped nanocrystals have been produced via hot injection, while the doctor blading followed by thermolysis yielded thick films. Free-standing polycrystalline powders of MnS are produced by direct thermolysis of precursor powders. All thermolysis techniques produced cubic MnS, as confirmed by powder X-ray diffraction, scanning electron microscopy, energy-dispersive X-ray spectroscopy, and Raman spectroscopy. Magnetic measurements reveal that the α-MnS nanocrystals exhibit ferromagnetic behavior with a large coercive field strength (e.g., 0.723 kOe for 6.8 nm nanocrystals).
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Affiliation(s)
- Abdulaziz
M. Alanazi
- Department
of Chemistry, University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
| | - Paul D. McNaughter
- Department
of Chemistry, University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
| | - Firoz Alam
- Department
of Chemistry, University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
| | | | - George F. S. Whitehead
- Department
of Chemistry, University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
| | - Floriana Tuna
- Department
of Chemistry, University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
| | - Paul O’Brien
- Department
of Chemistry, University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
- Department
of Materials, University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
| | - David Collison
- Department
of Chemistry, University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
| | - David J. Lewis
- Department
of Materials, University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
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7
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Ming SK, Taylor RA, McNaughter PD, Lewis DJ, Leontiadou MA, O'Brien P. Tunable structural and optical properties of CuInS 2 colloidal quantum dots as photovoltaic absorbers. RSC Adv 2021; 11:21351-21358. [PMID: 35478826 PMCID: PMC9034010 DOI: 10.1039/d1ra03659a] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2021] [Accepted: 06/09/2021] [Indexed: 11/30/2022] Open
Abstract
Facile phase selective synthesis of CuInS2 (CIS) nanostructures has been an important pursuit because of the opportunity for tunable optical properties of the phases, and in this respect is investigated by hot-injection colloidal synthesis in this study. Relatively monodispersed colloidal quantum dots (3.8–5.6 nm) of predominantly chalcopyrite structure synthesized at 140, 180 and 210 °C over 60 minutes from copper(ii) hexafluoroacetylacetonate hydrate and indium(iii) diethyldithiocarbamate precursors exhibit temperature-dependent structural variability. The slightly off-stoichiometric quantum dots are copper-deficient in which copper vacancies , indium interstitials , indium–copper anti-sites and surface trapping states are likely implicated in broad photoluminescence emission with short radiative lifetimes, τ1, τ2, and τ3 of 1.5–2.1, 7.8–13.9 and 55.2–70.8 ns and particle-size dependent tunable band gaps between 2.25 and 2.32 eV. Further structural and optical tunability (Eg between 2.03 and 2.28 eV) is achieved with possible time-dependent wurtzite to chalcopyrite phase transformation at 180 °C likely involving a dynamic interplay of kinetic and thermodynamic factors. We report the facile hot-injection colloidal synthesis of near-stoichiometric CuInS2 quantum dots at varying reaction times and temperatures which exhibit both optical and structural tunability with implications for enhanced photovoltaic utility.![]()
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Affiliation(s)
- Shanna-Kay Ming
- Department of Chemistry, University of the West Indies St. Augustine Trinidad and Tobago
| | - Richard A Taylor
- Department of Chemistry, University of the West Indies St. Augustine Trinidad and Tobago
| | | | - David J Lewis
- Department of Materials, University of Manchester Manchester M13 9PL UK
| | - Marina A Leontiadou
- Department of Physics and Astronomy & Photon Science Institute, The University of Manchester Manchester M13 9PL UK
| | - Paul O'Brien
- Department of Chemistry, University of Manchester M13 BB UK.,Department of Materials, University of Manchester Manchester M13 9PL UK
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8
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Alsowayigh MM, Timco GA, Borilovic I, Alanazi A, Vitorica-Yrezabal IJ, Whitehead GFS, McNaughter PD, Tuna F, O'Brien P, Winpenny REP, Lewis DJ, Collison D. Heterometallic 3d-4f Complexes as Air-Stable Molecular Precursors in Low Temperature Syntheses of Stoichiometric Rare-Earth Orthoferrite Powders. Inorg Chem 2020; 59:15796-15806. [PMID: 33044071 DOI: 10.1021/acs.inorgchem.0c02249] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Four 3d-4f hetero-polymetallic complexes [Fe2Ln2((OCH2)3CR)2(O2CtBu)6(H2O)4] (where Ln = La (1 and 2) and Gd (3 and 4); and R = Me (1 and 3) and Et (2 and 4)) are synthesized and analyzed using elemental analysis, Fourier transform infrared spectroscopy, thermogravimetric analysis, and SQUID magnetometry. Crystal structures are obtained for both methyl derivatives and show that the complexes are isostructural and adopt a defective dicubane topology. The four heavy metals are connected with two alkoxide bridges. These four precursors are used as single-source precursors to prepare rare-earth orthoferrite pervoskites of the form LnFeO3. Thermal decomposition in a ceramic boat in a tube furnace gives orthorhombic LnFeO3 powders using optimized temperatures and decomposition times: LaFeO3 formed at 650 °C over 30 min, whereas GdFeO3 formed at 750 °C over 18 h. These materials are structurally characterized using powder X-ray diffraction, Raman spectroscopy, scanning electron microscopy, energy-dispersive X-ray map spectroscopy, and SQUID magnetometry. EDX spectroscopy mapping reveals a homogeneous spatial distribution of elements for all four materials consistent with LnFeO3. Magnetic measurements on complexes 1-4 confirm the presence of weak antiferromagnetic coupling between the central Fe(III) ions of the clusters and negligible ferromagnetic interaction with peripheral Gd(III) ions in 3 and 4. Zero-field-cooled and field-cooled measurements of magnetization of LaFeO3 and GdFeO3 in the solid-state suggest that both materials are ferromagnetic, and both materials show open magnetic hysteresis loops at 5 and 300 K, with Msat higher than previously reported for these nanomaterials. We conclude that this is a new and facile low temperature route to these important magnetic materials that is potentially universal, limited only by what metals can be programmed into the precursor complexes.
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Affiliation(s)
- Marwah M Alsowayigh
- Department of Chemistry, The University of Manchester, Oxford Road, Manchester, M13 9PL, United Kingdom.,Chemistry Department, College of Science, King Faisal University, P.O. 380, Al-Ahsa 31982, Kingdom of Saudia Arabia
| | - Grigore A Timco
- Department of Chemistry, The University of Manchester, Oxford Road, Manchester, M13 9PL, United Kingdom
| | - Ivana Borilovic
- Photon Science Institute, The University of Manchester, Oxford Road, Manchester, M13 9PL, United Kingdom
| | - Abdulaziz Alanazi
- Department of Chemistry, The University of Manchester, Oxford Road, Manchester, M13 9PL, United Kingdom
| | - Inigo J Vitorica-Yrezabal
- Department of Chemistry, The University of Manchester, Oxford Road, Manchester, M13 9PL, United Kingdom
| | - George F S Whitehead
- Department of Chemistry, The University of Manchester, Oxford Road, Manchester, M13 9PL, United Kingdom
| | - Paul D McNaughter
- Department of Chemistry, The University of Manchester, Oxford Road, Manchester, M13 9PL, United Kingdom
| | - Floriana Tuna
- Photon Science Institute, The University of Manchester, Oxford Road, Manchester, M13 9PL, United Kingdom
| | - Paul O'Brien
- Department of Chemistry, The University of Manchester, Oxford Road, Manchester, M13 9PL, United Kingdom.,Department of Materials, The University of Manchester, Oxford Road, Manchester, M13 9PL, United Kingdom
| | - Richard E P Winpenny
- Department of Chemistry, The University of Manchester, Oxford Road, Manchester, M13 9PL, United Kingdom
| | - David J Lewis
- Department of Materials, The University of Manchester, Oxford Road, Manchester, M13 9PL, United Kingdom
| | - David Collison
- Department of Chemistry, The University of Manchester, Oxford Road, Manchester, M13 9PL, United Kingdom
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9
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Alderhami SA, Collison D, Lewis DJ, McNaughter PD, O'Brien P, Spencer BF, Vitorica-Yrezabal I, Whitehead G. Accessing γ-Ga 2S 3 by solventless thermolysis of gallium xanthates: a low-temperature limit for crystalline products. Dalton Trans 2019; 48:15605-15612. [PMID: 31389451 DOI: 10.1039/c9dt02061f] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Alkyl-xanthato gallium(iii) complexes of the form [Ga(S2COR)3], where R = Me (1), Et (2), iPr (3), nPr (4), nBu (5), sBu (6) and iBu (7), have been synthesized and fully characterised. The crystal structures for 1 and 3-7 have been solved and examined to elucidate if these structures are related to their decomposition. Thermogravimetric analysis was used to gain insight into the decomposition temperatures for each complex. Unlike previously explored metal xanthate complexes which break down at low temperatures (<250 °C), to form crystalline metal chalcogenides, powder X-ray diffraction measurements suggest that when R ≥ Et these complexes did not produce crystalline gallium sulfides until heated to 500 °C, where γ-Ga2S3 was the sole product formed. In the case of R = Me, Chugaev elimination did not occur and amorphous GaxSy products were formed. We conclude therefore that the low-temperature synthesis route offered by the thermal decomposition of metal xanthate precursors, which has been reported for many metal sulfide systems prior to this, may not be appropriate in the case of gallium sulfides.
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Affiliation(s)
- Suliman A Alderhami
- School of Chemistry, The University of Manchester, Oxford Road, Manchester, M13 9PL, UK and Chemistry Department, Faculty of Science and Arts, Al-Baha University, Al Makhwah, Saudi Arabia
| | - David Collison
- School of Chemistry, The University of Manchester, Oxford Road, Manchester, M13 9PL, UK
| | - David J Lewis
- School of Materials, The University of Manchester, Oxford Road, Manchester, M13 9PL, UK.
| | - Paul D McNaughter
- School of Chemistry, The University of Manchester, Oxford Road, Manchester, M13 9PL, UK
| | - Paul O'Brien
- School of Chemistry, The University of Manchester, Oxford Road, Manchester, M13 9PL, UK and School of Materials, The University of Manchester, Oxford Road, Manchester, M13 9PL, UK.
| | - Ben F Spencer
- School of Materials, The University of Manchester, Oxford Road, Manchester, M13 9PL, UK.
| | | | - George Whitehead
- School of Chemistry, The University of Manchester, Oxford Road, Manchester, M13 9PL, UK
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10
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Li X, McNaughter PD, O'Brien P, Minamimoto H, Murakoshi K. Photoelectrochemical Formation of Polysulfide at PbS QD-Sensitized Plasmonic Electrodes. J Phys Chem Lett 2019; 10:5357-5363. [PMID: 31442057 DOI: 10.1021/acs.jpclett.9b02045] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Effective electron-hole separation is a key to enhance photoenergy conversion of semiconductor quantum dot (QD)-sensitized plasmonic solar cells. However, in contrast to intense studies on electron transfer, hole transfer from QDs and consequent chemical reactions with donors in electrolytes remain unclear. Herein, in situ electrochemical surface-enhanced Raman scattering (SERS) measurement on a PbS QD-sensitized TiO2/Au/TiO2 photoelectrode indicated formation of cyclo-octasulfur (α-S8) via tuning the electrochemical potential. A photocurrent density of 100 nA/cm2 was recorded simultaneously even with an extremely low QD loading. Two-dimensional correlation analysis of the SERS revealed subsequent formation of S8- and S42- at -1.1 to -0.1 V (vs Ag/AgCl), S8 from -0.3 V, and S52- and S62- at ≥0.2 V via complex disproportionation reactions. The sensitive detection is attributed to the enhanced electromagnetic field of localized surface plasmon resonance, which provides a better understanding of charge separation processes in QD-sensitized solar cells.
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Affiliation(s)
- Xiaowei Li
- Department of Chemistry, Faculty of Science , Hokkaido University , Sapporo 060-0810 , Japan
| | | | | | - Hiro Minamimoto
- Department of Chemistry, Faculty of Science , Hokkaido University , Sapporo 060-0810 , Japan
| | - Kei Murakoshi
- Department of Chemistry, Faculty of Science , Hokkaido University , Sapporo 060-0810 , Japan
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11
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Kun WN, McNaughter PD, Nyamen LD, Spencer BF, O'Brien P, Ndifon PT, Revaprasadu N. Synthesis of (Bi1−xSbx)2S3 solid solutions via thermal decomposition of bismuth and antimony piperidinedithiocarbamates. RSC Adv 2019; 9:15836-15844. [PMID: 35521396 PMCID: PMC9064327 DOI: 10.1039/c9ra01127g] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2019] [Accepted: 05/09/2019] [Indexed: 12/26/2022] Open
Abstract
The synthesis of the complete range of (Bi1−xSbx)2S3 solid solutions, where 0 ≤ x ≤ 1, by the variation of the mole ratio of bismuth and antimony piperidine dithiocarbamate complexes is reported. There was a near linear expansion of a and c lattice parameters as the mole ratio of the antimony precursor was increased. The composition of the particles directionally followed the amount of precursor ratio used. When the composition of particles was compared to cell parameters, a slight deviation from Vegard's law was observed with a corresponding contraction of the b parameter and an approximately 3.5% reduction of the lattice volume. The nanorods obtained showed aspect ratios that depend on the composition of the material. The Bi and Sb rich materials had high aspect ratios of 16.58 and 16.58 respectively with a minimum aspect ratio of 2.58 observed for x = 0.50. A full range of (Bi1−xSbx)2S3 solid solutions from bismuth and antimony piperidine dithiocarbamate complexes is reported.![]()
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Affiliation(s)
- Walter N. Kun
- Department of Inorganic Chemistry
- University of Yaoundé
- Yaoundé
- Cameroon
- School of Materials
| | | | - Linda D. Nyamen
- Department of Inorganic Chemistry
- University of Yaoundé
- Yaoundé
- Cameroon
| | - Ben F. Spencer
- Schools of Chemistry and Materials
- University of Manchester
- Manchester
- UK
| | - Paul O'Brien
- School of Materials
- University of Manchester
- Manchester
- UK
- Schools of Chemistry and Materials
| | - Peter T. Ndifon
- Department of Inorganic Chemistry
- University of Yaoundé
- Yaoundé
- Cameroon
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12
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Mensah MB, McNaughter PD, McAdams SG, Tuna F, Lewis DJ, Awudza JAM, Revaprasadu N, O'Brien P. Ricinoleic Acid as a Green Alternative to Oleic Acid in the Synthesis of Doped Nanocrystals. ChemistrySelect 2018. [DOI: 10.1002/slct.201803253] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Michael B. Mensah
- Department of Chemistry; Kwame Nkrumah University of Science and Technology, PMB; Kumasi Ghana
| | - Paul D. McNaughter
- The School of Chemistry; The University of Manchester, Oxford Road; Manchester M13 9PL United Kingdom
| | - Simon G. McAdams
- The School of Chemistry; The University of Manchester, Oxford Road; Manchester M13 9PL United Kingdom
| | - Floriana Tuna
- The School of Chemistry; The University of Manchester, Oxford Road; Manchester M13 9PL United Kingdom
| | - David J. Lewis
- The School of Materials; The University of Manchester, Oxford Road; Manchester M13 9PL United Kingdom
| | - Johannes A. M. Awudza
- Department of Chemistry; Kwame Nkrumah University of Science and Technology, PMB; Kumasi Ghana
| | - Neerish Revaprasadu
- Department of Chemistry; University of Zululand, Private Bag X1001; KwaDlangezwa 3886 South Africa
| | - Paul O'Brien
- The School of Chemistry; The University of Manchester, Oxford Road; Manchester M13 9PL United Kingdom
- The School of Materials; The University of Manchester, Oxford Road; Manchester M13 9PL United Kingdom
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13
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Ezenwa TE, McNaughter PD, Raftery J, Lewis DJ, O'Brien P. Full compositional control of PbS xSe 1-x thin films by the use of acylchalcogourato lead(ii) complexes as precursors for AACVD. Dalton Trans 2018; 47:16938-16943. [PMID: 30444503 DOI: 10.1039/c8dt03443e] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Selenium and sulfur derivatives of lead(ii) acylchalcogourato complexes have been used to deposit PbSxSe1-x thin films by AACVD. By variation of the mole ratio of sulfur and selenium precursors in the aerosol feed solution the full range of compositions of PbSxSe1-x was obtained, i.e. 0 ≥ x ≥ 1. The films showed no contaminant phases demonstrating the potential for acylchalcogourato metal complexes as precursors for metal chalcogenide thin films. The crystal structure for bis[N,N-diethyl-N'-2-naphthoylthioureato]lead(ii) was solved and displayed the expected decreases in Pb-E bond lengths from the previously reported selenium variant.
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Affiliation(s)
- Tagbo Emmanuel Ezenwa
- School of Chemistry, The University of Manchester, Oxford Road, Manchester, M13 9PL, UK.
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14
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Li X, McNaughter PD, O'Brien P, Minamimoto H, Murakoshi K. Plasmonically enhanced electromotive force of narrow bandgap PbS QD-based photovoltaics. Phys Chem Chem Phys 2018; 20:14818-14827. [PMID: 29780991 DOI: 10.1039/c8cp00767e] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Electromotive force of photovoltaics is a key to define the output power density of photovoltaics. Multiple exciton generation (MEG) exhibited by semiconductor quantum dots (QDs) has great potential to enhance photovoltaic performance owing to the ability to generate more than one electron-hole pairs when absorbing a single photon. However, even in MEG-based photovoltaics, limitation of modifying the electromotive force exists due to the intrinsic electrochemical potential of the conduction band-edges of QDs. Here we report a pronouncedly improved photovoltaic performance by constructing a PbS QD-sensitized electrode that comprises plasmon-active Au nanoparticles embedded in a titanium dioxide thin film. Significant enhancement on electromotive force is characterized by the onset potential of photocurrent generation using MEG-effective PbS QDs with a narrow bandgap energy (Eg = 0.9 eV). By coupling with localized surface plasmon resonance (LSPR), such QDs exhibit improved photoresponses and the highest output power density over the other QDs with larger bandgap energies (Eg = 1.1 and 1.7 eV) under visible light irradiation. The wavelength-dependent onset potential and the output power density suggest effective electron injection owing to the enhanced density of electrons excited by energy overlapping between MEG and LSPR.
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Affiliation(s)
- Xiaowei Li
- Department of Chemistry, Faculty of Science, Hokkaido University, Sapporo, 060-0810, Japan.
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15
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Matthews PD, Hirunpinyopas W, Lewis EA, Brent JR, McNaughter PD, Zeng N, Thomas AG, O'Brien P, Derby B, Bissett MA, Haigh SJ, Dryfe RAW, Lewis DJ. Black phosphorus with near-superhydrophobic properties and long-term stability in aqueous media. Chem Commun (Camb) 2018; 54:3831-3834. [DOI: 10.1039/c8cc01789a] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We present the use of a polymeric stabilizer which stymies the degradation of black phosphorus nanosheets in aqueous media as well as imparting superhydrophobic properties to immobilised nanosheets.
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Affiliation(s)
- Peter D. Matthews
- School of Chemical & Physical Sciences
- Keele University
- Staffordshire
- UK
- School of Chemistry
| | - Wisit Hirunpinyopas
- School of Chemistry
- University of Manchester
- Manchester
- UK
- National Graphene Institute
| | | | - Jack R. Brent
- School of Materials
- University of Manchester
- Manchester
- UK
| | | | - Niting Zeng
- School of Materials
- University of Manchester
- Manchester
- UK
| | | | - Paul O'Brien
- School of Chemistry
- University of Manchester
- Manchester
- UK
- School of Materials
| | - Brian Derby
- School of Materials
- University of Manchester
- Manchester
- UK
| | - Mark A. Bissett
- National Graphene Institute
- University of Manchester
- UK
- School of Materials
- University of Manchester
| | - Sarah J. Haigh
- National Graphene Institute
- University of Manchester
- UK
- School of Materials
- University of Manchester
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16
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Saah SA, Khan MD, McNaughter PD, Awudza JAM, Revaprasadu N, O’Brien P. Facile synthesis of a PbS1−xSex (0 ≤ x ≤ 1) solid solution using bis(N,N-diethyl-N′-naphthoylchalcogenoureato)lead(ii) complexes. NEW J CHEM 2018. [DOI: 10.1039/c8nj03299h] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
A precise composition and band gap tunable PbS1−xSex solid solution was prepared by a single source route.
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Affiliation(s)
- Selina Ama Saah
- Department of Chemistry
- Kwame Nkrumah University of Science and Technology
- Kumasi
- Ghana
- Department of Chemical Sciences
| | - Malik Dilshad Khan
- Department of Chemistry
- University of Zululand
- Kwa-Dlangezwa 3880
- South Africa
- School of Chemistry
| | | | - Johannes A. M. Awudza
- Department of Chemistry
- Kwame Nkrumah University of Science and Technology
- Kumasi
- Ghana
| | | | - Paul O’Brien
- School of Chemistry
- The University of Manchester
- Manchester
- UK
- School of Materials
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17
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Al-Shakban M, Matthews PD, Deogratias G, McNaughter PD, Raftery J, Vitorica-Yrezabal I, Mubofu EB, O’Brien P. Novel Xanthate Complexes for the Size-Controlled Synthesis of Copper Sulfide Nanorods. Inorg Chem 2017; 56:9247-9254. [DOI: 10.1021/acs.inorgchem.7b01288] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
| | | | - Geradius Deogratias
- Chemistry Department, University of Dar es Salaam, P.O. Box 35061, Dar es Salaam, Tanzania
| | | | | | | | - Egid B. Mubofu
- Chemistry Department, University of Dar es Salaam, P.O. Box 35061, Dar es Salaam, Tanzania
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18
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Brent JR, McNaughter PD, O'Brien P. Precursor determined lateral size control of monolayer MoS 2 nanosheets from a series of alkylammonium thiomolybdates: a reversal of trend between growth media. Chem Commun (Camb) 2017; 53:6428-6431. [PMID: 28560371 DOI: 10.1039/c7cc01641g] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
The growth of ligand-free MoS2 nanosheets with mean lateral sizes below 5 nm at 270 °C is reported. Nanosheets grown from a melt of tetraalkylammonium tetrathiomolybdates, [R4N]2[MoS4] (R = n-butyl, n-hexyl or n-octyl) vary in width between mean lateral sizes of 4.35 and 2.1 nm. Inclusion of the precursors into a polymer matrix shows the opposite trend in lateral dimensions with sheet widths ranging from 3.5 to 4.8 nm.
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Affiliation(s)
- J R Brent
- School of Materials, The University of Manchester, Oxford Road, Manchester, M13 9PL, UK. paul.o'
| | - P D McNaughter
- School of Chemistry, The University of Manchester, Oxford Road, Manchester, M13 9PL, UK
| | - P O'Brien
- School of Materials, The University of Manchester, Oxford Road, Manchester, M13 9PL, UK. paul.o' and School of Chemistry, The University of Manchester, Oxford Road, Manchester, M13 9PL, UK
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19
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Matthews PD, McNaughter PD, Lewis DJ, O'Brien P. Shining a light on transition metal chalcogenides for sustainable photovoltaics. Chem Sci 2017; 8:4177-4187. [PMID: 28626562 PMCID: PMC5468987 DOI: 10.1039/c7sc00642j] [Citation(s) in RCA: 71] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2017] [Accepted: 03/13/2017] [Indexed: 01/09/2023] Open
Abstract
Transition metal chalcogenides are an important family of materials that have received significant interest in recent years as they have the potential for diverse applications ranging from use in electronics to industrial lubricants. One of their most exciting properties is the ability to generate electricity from incident light. In this perspective we will summarise and highlight the key results and challenges in this area and explain how transition metal chalcogenides are a good choice for future sustainable photovoltaics.
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Affiliation(s)
- Peter D Matthews
- School of Chemistry , University of Manchester , Oxford Road , Manchester , M13 9PL , UK . paul.o'
| | - Paul D McNaughter
- School of Chemistry , University of Manchester , Oxford Road , Manchester , M13 9PL , UK . paul.o'
| | - David J Lewis
- School of Materials , University of Manchester , Oxford Road , Manchester , M13 9PL , UK
| | - Paul O'Brien
- School of Chemistry , University of Manchester , Oxford Road , Manchester , M13 9PL , UK . paul.o'
- School of Materials , University of Manchester , Oxford Road , Manchester , M13 9PL , UK
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20
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Kumar V, Brent JR, Shorie M, Kaur H, Chadha G, Thomas AG, Lewis EA, Rooney AP, Nguyen L, Zhong XL, Burke MG, Haigh SJ, Walton A, McNaughter PD, Tedstone AA, Savjani N, Muryn CA, O'Brien P, Ganguli AK, Lewis DJ, Sabherwal P. Nanostructured Aptamer-Functionalized Black Phosphorus Sensing Platform for Label-Free Detection of Myoglobin, a Cardiovascular Disease Biomarker. ACS Appl Mater Interfaces 2016; 8:22860-8. [PMID: 27508925 DOI: 10.1021/acsami.6b06488] [Citation(s) in RCA: 131] [Impact Index Per Article: 16.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
We report the electrochemical detection of the redox active cardiac biomarker myoglobin (Mb) using aptamer-functionalized black phosphorus nanostructured electrodes by measuring direct electron transfer. The as-synthesized few-layer black phosphorus nanosheets have been functionalized with poly-l-lysine (PLL) to facilitate binding with generated anti-Mb DNA aptamers on nanostructured electrodes. This aptasensor platform has a record-low detection limit (∼0.524 pg mL(-1)) and sensitivity (36 μA pg(-1) mL cm(-2)) toward Mb with a dynamic response range from 1 pg mL(-1) to 16 μg mL(-1) for Mb in serum samples. This strategy opens up avenues to bedside technologies for multiplexed diagnosis of cardiovascular diseases in complex human samples.
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Affiliation(s)
- Vinod Kumar
- Institute of Nano Science & Technology , Habitat Centre, Sector-64, Mohali 160062, Punjab, India
| | - Jack R Brent
- School of Materials, University of Manchester , Oxford Road, Manchester M13 9PL, United Kingdom
| | - Munish Shorie
- Institute of Nano Science & Technology , Habitat Centre, Sector-64, Mohali 160062, Punjab, India
| | - Harmanjit Kaur
- Institute of Nano Science & Technology , Habitat Centre, Sector-64, Mohali 160062, Punjab, India
| | - Gaganpreet Chadha
- Institute of Nano Science & Technology , Habitat Centre, Sector-64, Mohali 160062, Punjab, India
| | - Andrew G Thomas
- School of Materials, University of Manchester , Oxford Road, Manchester M13 9PL, United Kingdom
| | - Edward A Lewis
- School of Materials, University of Manchester , Oxford Road, Manchester M13 9PL, United Kingdom
| | - Aidan P Rooney
- School of Materials, University of Manchester , Oxford Road, Manchester M13 9PL, United Kingdom
| | - Lan Nguyen
- School of Materials, University of Manchester , Oxford Road, Manchester M13 9PL, United Kingdom
| | - Xiang Li Zhong
- School of Materials, University of Manchester , Oxford Road, Manchester M13 9PL, United Kingdom
| | - M Grace Burke
- School of Materials, University of Manchester , Oxford Road, Manchester M13 9PL, United Kingdom
| | - Sarah J Haigh
- School of Materials, University of Manchester , Oxford Road, Manchester M13 9PL, United Kingdom
| | - Alex Walton
- School of Chemistry, University of Manchester , Oxford Road, Manchester M13 9PL, United Kingdom
| | - Paul D McNaughter
- School of Chemistry, University of Manchester , Oxford Road, Manchester M13 9PL, United Kingdom
| | - Aleksander A Tedstone
- School of Chemistry, University of Manchester , Oxford Road, Manchester M13 9PL, United Kingdom
| | - Nicky Savjani
- School of Chemistry, University of Manchester , Oxford Road, Manchester M13 9PL, United Kingdom
| | - Christopher A Muryn
- School of Chemistry, University of Manchester , Oxford Road, Manchester M13 9PL, United Kingdom
| | - Paul O'Brien
- School of Materials, University of Manchester , Oxford Road, Manchester M13 9PL, United Kingdom
- School of Chemistry, University of Manchester , Oxford Road, Manchester M13 9PL, United Kingdom
| | - Ashok K Ganguli
- Institute of Nano Science & Technology , Habitat Centre, Sector-64, Mohali 160062, Punjab, India
- Department of Chemistry, Indian Institute of Technology Delhi , Hauz Khas, New Delhi 110016, India
| | - David J Lewis
- School of Materials, University of Manchester , Oxford Road, Manchester M13 9PL, United Kingdom
- School of Chemistry, University of Manchester , Oxford Road, Manchester M13 9PL, United Kingdom
| | - Priyanka Sabherwal
- Institute of Nano Science & Technology , Habitat Centre, Sector-64, Mohali 160062, Punjab, India
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21
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Che Rose L, Bear JC, McNaughter PD, Southern P, Piggott RB, Parkin IP, Qi S, Mayes AG. A SPION-eicosane protective coating for water soluble capsules: Evidence for on-demand drug release triggered by magnetic hyperthermia. Sci Rep 2016; 6:20271. [PMID: 26842884 PMCID: PMC4740764 DOI: 10.1038/srep20271] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2015] [Accepted: 11/25/2015] [Indexed: 01/22/2023] Open
Abstract
An orally-administered system for targeted, on-demand drug delivery to the gastrointestinal (GI) tract is highly desirable due to the high instances of diseases of that organ system and harsh mechanical and physical conditions any such system has to endure. To that end, we present an iron oxide nanoparticle/wax composite capsule coating using magnetic hyperthermia as a release trigger. The coating is synthesised using a simple dip-coating process from pharmaceutically approved materials using a gelatin drug capsule as a template. We show that the coating is impervious to chemical conditions within the GI tract and is completely melted within two minutes when exposed to an RF magnetic field under biologically-relevant conditions. The overall simplicity of action, durability and non-toxic and inexpensive nature of our system demonstrated herein are key for successful drug delivery systems.
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Affiliation(s)
- Laili Che Rose
- School of Chemistry, University of East Anglia, Norwich Research Park, Norwich, NR4 7TJ, UK.,School of Fundamental Science, Universiti Malaysia Terengganu, 21030 Kuala Terengganu, Terengganu Darul Iman, Malaysia
| | - Joseph C Bear
- Department of Chemistry, University College London, 20 Gordon Street, London, WC1H 0AJ, UK
| | - Paul D McNaughter
- School of Chemistry, University of East Anglia, Norwich Research Park, Norwich, NR4 7TJ, UK
| | - Paul Southern
- UCL Healthcare Biomagnetics Laboratories, Royal Institution of Great Britain, 21 Albemarle Street, London, W1S 4BS, UK
| | - R Ben Piggott
- Institute of Food Research, Norwich Research Park, Colney, Norwich, NR4 7UA, UK
| | - Ivan P Parkin
- Department of Chemistry, University College London, 20 Gordon Street, London, WC1H 0AJ, UK
| | - Sheng Qi
- School of Pharmacy, University of East Anglia, Norwich Research Park, Norwich, NR4 7TJ, UK
| | - Andrew G Mayes
- School of Chemistry, University of East Anglia, Norwich Research Park, Norwich, NR4 7TJ, UK
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22
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Che Rose L, Bear JC, Southern P, McNaughter PD, Piggott RB, Parkin IP, Qi S, Hills BP, Mayes AG. On-demand, magnetic hyperthermia-triggered drug delivery: optimisation for the GI tract. J Mater Chem B 2016; 4:1704-1711. [DOI: 10.1039/c5tb02068a] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An orally-administered vehicle for targeted on-demand delivery to the gastrointestinal tract is presented. Hyperthermia is induced from an external AC magnetic field to melt a super paramagnetic iron oxide nanoparticle wax composite coating and hence release the capsule content.
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Affiliation(s)
- Laili Che Rose
- School of Chemistry
- University of East Anglia
- Norwich
- UK
- School Of Fundamental Science
| | - Joseph C. Bear
- Department of Chemistry
- University College London
- London
- UK
| | - Paul Southern
- UCL Healthcare Biomagnetics Laboratories
- Royal Institution of Great Britain
- London
- UK
| | | | - R. Ben Piggott
- Institute of Food Research
- Norwich Research Park
- Norwich
- UK
| | - Ivan P. Parkin
- Department of Chemistry
- University College London
- London
- UK
| | - Sheng Qi
- School of Pharmacy
- University of East Anglia
- Norwich
- UK
| | - Brian P. Hills
- Institute of Food Research
- Norwich Research Park
- Norwich
- UK
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23
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Brent JR, Ganguli AK, Kumar V, Lewis DJ, McNaughter PD, O'Brien P, Sabherwal P, Tedstone AA. On the stability of surfactant-stabilised few-layer black phosphorus in aqueous media. RSC Adv 2016. [DOI: 10.1039/c6ra21296d] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
The stability of few-layer black phosphorus has been studied in aqueous media using a range of spectroscopic techniques. The material is meta-stable, degrading over time mainly to phosphoric acids.
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Affiliation(s)
| | - Ashok K. Ganguli
- Institute of Nano Science & Technology (INST)
- Mohali-160062
- India
- Department of Chemistry
- Indian Institute of Technology Delhi
| | - Vinod Kumar
- Institute of Nano Science & Technology (INST)
- Mohali-160062
- India
| | | | | | - Paul O'Brien
- School of Materials
- University of Manchester
- UK
- School of Chemistry
- University of Manchester
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24
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McNaughter PD, Saah SA, Akhtar M, Abdulwahab K, Malik MA, Raftery J, Awudza JAM, O'Brien P. The effect of alkyl chain length on the structure of lead(ii) xanthates and their decomposition to PbS in melt reactions. Dalton Trans 2016; 45:16345-16353. [DOI: 10.1039/c6dt02859d] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Lead(ii) n-alkylxanthates with varying alkyl groups are used in melt reactions to impart size control on the PbS nanocrystals formed.
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Affiliation(s)
| | - Selina A. Saah
- Department of Chemistry
- Kwame Nkrumah University of Science and Technology
- Kumasi
- Ghana
| | - Masood Akhtar
- School of Chemistry
- The University of Manchester
- Manchester
- UK
| | | | - M. Azad Malik
- School of Materials
- The University of Manchester
- Manchester
- UK
| | - James Raftery
- School of Chemistry
- The University of Manchester
- Manchester
- UK
| | | | - Paul O'Brien
- School of Chemistry
- The University of Manchester
- Manchester
- UK
- School of Materials
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25
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Gowenlock CE, McGettrick JD, McNaughter PD, O’Brien P, Dunnill CW, Barron AR. Copper-complexed isonicotinic acid functionalized aluminum oxide nanoparticles. MGC 2015. [DOI: 10.3233/mgc-150188] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Affiliation(s)
- Cathren E. Gowenlock
- Energy Safety Research Institute (ESRI), College of Engineering, Swansea University, Bay Campus, Fabian Way, Swansea, Wales, UK
| | - James D. McGettrick
- SPECIFIC, College of Engineering, Swansea University, Baglan Bay Innovation & Knowledge Centre, Central Avenue, Baglan, Port Talbot, Wales, UK
| | - Paul D. McNaughter
- Department of Chemistry, Manchester University, Oxford Road, Manchester, UK
| | - Paul O’Brien
- Department of Chemistry, Manchester University, Oxford Road, Manchester, UK
| | - Charles W. Dunnill
- Energy Safety Research Institute (ESRI), College of Engineering, Swansea University, Bay Campus, Fabian Way, Swansea, Wales, UK
| | - Andrew R. Barron
- Energy Safety Research Institute (ESRI), College of Engineering, Swansea University, Bay Campus, Fabian Way, Swansea, Wales, UK
- Department of Chemistry, Rice University, Houston, TX, USA
- Department of Materials Science and Nanoengineering, Rice University, Houston, TX, USA
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26
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Gomez V, Bear JC, McNaughter PD, McGettrick JD, Watson T, Charbonneau C, O'Brien P, Barron AR, Dunnill CW. Bi-phasic titanium dioxide nanoparticles doped with nitrogen and neodymium for enhanced photocatalysis. Nanoscale 2015; 7:17735-17744. [PMID: 26455738 DOI: 10.1039/c5nr06025g] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Bi-phasic or multi-phasic composite nanoparticles for use in photocatalysis have been produced by a new synthetic approach. Sol-gel methods are used to deposit multiple layers of active material onto soluble substrates. In this work, a layer of rutile (TiO2) was deposited onto sodium chloride pellets followed by an annealing step and a layer of anatase. After dissolving the substrate, bi-phasic nanoparticles containing half anatase and half rutile TiO2; with "Janus-like" characteristics are obtained. Nitrogen and neodymium doping of the materials were observed to enhance the photocatalytic properties both under UV and white light irradiation. The unique advantage of this synthetic method is the ability to systematically dope separate sides of the nanoparticles. Nitrogen doping was found to be most effective on the anatase side of the nanoparticle while neodymium was found to be most effective on the rutile side. Rhodamine B dye was effectively photodegraded by co-doped particles under white light.
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Affiliation(s)
- Virginia Gomez
- Energy Safety Research Institute (ESRI), College of Engineering, Swansea University, Bay Campus, Fabian Way Swansea, SA1 8EN, UK.
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Yan J, McNaughter PD, Wang Z, Hodson N, Chen M, Cui Z, O'Brien P, Saunders BR. Controlled aggregation of quantum dot dispersions by added amine bilinkers and effects on hybrid polymer film properties. RSC Adv 2015. [DOI: 10.1039/c5ra15009d] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Nanocrystal aggregation triggered by added bilinker prior to P3HT/ZnO film formation results in increased film thickness and light absorption.
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Affiliation(s)
- Junfeng Yan
- Polymers, Composites and Carbon Research Group
- School of Materials
- University of Manchester
- Manchester
- UK
| | | | - Ziji Wang
- Polymers, Composites and Carbon Research Group
- School of Materials
- University of Manchester
- Manchester
- UK
| | - Nigel Hodson
- BioAFM Facility
- University of Manchester
- Manchester
- UK
| | - Mu Chen
- Polymers, Composites and Carbon Research Group
- School of Materials
- University of Manchester
- Manchester
- UK
| | - Zhengxing Cui
- Polymers, Composites and Carbon Research Group
- School of Materials
- University of Manchester
- Manchester
- UK
| | - Paul O'Brien
- Polymers, Composites and Carbon Research Group
- School of Materials
- University of Manchester
- Manchester
- UK
| | - Brian R. Saunders
- Polymers, Composites and Carbon Research Group
- School of Materials
- University of Manchester
- Manchester
- UK
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Bear JC, Peveler WJ, McNaughter PD, Parkin IP, O'Brien P, Dunnill CW. Nanoparticle–sulphur “inverse vulcanisation” polymer composites. Chem Commun (Camb) 2015; 51:10467-70. [DOI: 10.1039/c5cc03419a] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Sulfur based mouldable nanocomposite polymers by “inverse vulcanisation”. Functional materials from waste.
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Affiliation(s)
| | | | | | - Ivan P. Parkin
- Department of Chemistry
- University College London
- London
- UK
| | - Paul O'Brien
- School of Chemistry
- University of Manchester
- Manchester
- UK
- School of Materials
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Bear JC, Yu B, Blanco-Andujar C, McNaughter PD, Southern P, Mafina MK, Pankhurst QA, Parkin IP. A low cost synthesis method for functionalised iron oxide nanoparticles for magnetic hyperthermia from readily available materials. Faraday Discuss 2014; 175:83-95. [DOI: 10.1039/c4fd00062e] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The synthesis of iron oxide nanocrystals from reagents taken from high street sources using thermal decomposition of an iron–fatty acid precursor in a high boiling point solvent in the presence of surfactants is presented. The nanocrystals were characterised using a variety of techniques including: electron microscopy, X-ray dispersive spectroscopy, infrared spectroscopy, X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and magnetometry. Thermogravimetric analysis (TGA) is also used to compare the decomposition behaviour of iron oleate and iron palmitate, our nanoparticle precursors. The nanoparticles also exhibit shape anisotropy when prepared under optimum conditions. We show that these nanoparticles have potential in magnetic hyperthermia after transfer to aqueous media via an amphiphilic polymer.
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Affiliation(s)
- Joseph C. Bear
- Materials Chemistry Research Centre
- Department of Chemistry
- University College London
- London, UK
| | - Bin Yu
- Materials Chemistry Research Centre
- Department of Chemistry
- University College London
- London, UK
| | | | - Paul D. McNaughter
- School of Chemistry
- University of East Anglia
- Norwich Research Park
- Norwich, UK
| | - Paul Southern
- UCL Healthcare Biomagnetics Laboratories
- Royal Institution of Great Britain
- London, UK
| | | | - Quentin A. Pankhurst
- UCL Healthcare Biomagnetics Laboratories
- Royal Institution of Great Britain
- London, UK
| | - Ivan P. Parkin
- Materials Chemistry Research Centre
- Department of Chemistry
- University College London
- London, UK
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Bear JC, Hollingsworth N, McNaughter PD, Mayes AG, Ward MB, Nann T, Hogarth G, Parkin IP. Copper-doped CdSe/ZnS quantum dots: controllable photoactivated copper(I) cation storage and release vectors for catalysis. Angew Chem Int Ed Engl 2013; 53:1598-601. [PMID: 24376131 PMCID: PMC4138996 DOI: 10.1002/anie.201308778] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2013] [Indexed: 11/28/2022]
Abstract
The first photoactivated doped quantum dot vector for metal-ion release has been developed. A facile method for doping copper(I) cations within ZnS quantum dot shells was achieved through the use of metal-dithiocarbamates, with Cu+ ions elucidated by X-ray photoelectron spectroscopy. Photoexcitation of the quantum dots has been shown to release Cu+ ions, which was employed as an effective catalyst for the Huisgen [3+2] cycloaddition reaction. The relationship between the extent of doping, catalytic activity, and the fluorescence quenching was also explored.
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Affiliation(s)
- Joseph C Bear
- Department of Chemistry, University College London, 20 Gordon Street, London, WC1H 0AJ (UK)
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Bear JC, Hollingsworth N, McNaughter PD, Mayes AG, Ward MB, Nann T, Hogarth G, Parkin IP. Copper-Doped CdSe/ZnS Quantum Dots: Controllable Photoactivated Copper(I) Cation Storage and Release Vectors for Catalysis. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201308778] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Bear JC, McNaughter PD, Jurkschat K, Crossley A, Aldous L, Compton RG, Mayes AG, Wildgoose GG. Synthesis and characterization of carbon nanotubes covalently functionalized with amphiphilic polymer coated superparamagnetic nanocrystals. J Colloid Interface Sci 2012; 383:110-7. [DOI: 10.1016/j.jcis.2012.06.028] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2012] [Accepted: 06/13/2012] [Indexed: 10/28/2022]
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Wildgoose GG, Lawrence EJ, Bear JC, McNaughter PD. Enabling electrochemical studies of chemically-modified carbon nanotubes in non-aqueous electrolytes using superparamagnetic nanoparticle-nanotube composites co-modified by diazirine molecular “tethers”. Electrochem commun 2011. [DOI: 10.1016/j.elecom.2011.07.015] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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McNaughter PD, Bear JC, Steytler DC, Mayes AG, Nann T. A Thin Silica-Polymer Shell for Functionalizing Colloidal Inorganic Nanoparticles. Angew Chem Int Ed Engl 2011; 50:10384-7. [DOI: 10.1002/anie.201103954] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2011] [Revised: 08/17/2011] [Indexed: 11/07/2022]
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McNaughter PD, Bear JC, Steytler DC, Mayes AG, Nann T. A Thin Silica-Polymer Shell for Functionalizing Colloidal Inorganic Nanoparticles. Angew Chem Int Ed Engl 2011. [DOI: 10.1002/ange.201103954] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Hopkins WS, Hamilton SM, McNaughter PD, Mackenzie SR. VUV photodissociation dynamics of diatomic gold, Au2: A velocity map imaging study at 157nm. Chem Phys Lett 2009. [DOI: 10.1016/j.cplett.2009.10.072] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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