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1دورية أكاديمية
المؤلفون: Geers, M., Gill, T.B., Burnett, A.D., Bassey, E.N., Fabelo, O., Cañadillas-Delgado, L., Cliffe, M.J.
وصف الملف: text
العلاقة: https://eprints.whiterose.ac.uk/212790/1/d4cp01265h%20%281%29.pdfTest; Geers, M. orcid.org/0000-0002-3004-5846 , Gill, T.B. orcid.org/0000-0002-1191-6466 , Burnett, A.D. orcid.org/0000-0003-2175-1893 et al. (4 more authors) (2024) Magnetic structure and properties of the honeycomb antiferromagnet [Na(OH₂)₃]Mn(NCS)₃. Physical Chemistry Chemical Physics. ISSN 1463-9076
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2دورية أكاديمية
المؤلفون: Prasad, R.R.R., Boyadjieva, S.S., Zhou, G., Tan, J., Firth, F.C.N., Ling, S., Huang, Z., Cliffe, M.J., Foster, J.A., Forgan, R.S.
الوصف: Two-dimensional metal-organic nanosheets (MONs) have emerged as attractive alternatives to their three-dimensional metal-organic framework (MOF) counterparts for heterogeneous catalysis due to their greater external surface areas and higher accessibility of catalytically active sites. Zr MONs are particularly prized because of their chemical stability and high Lewis and Brønsted acidities of the Zr clusters. Herein, we show that careful control over modulated self-assembly and exfoliation conditions allows the isolation of the first example of a two-dimensional nanosheet wherein Zr6 clusters are linked by dicarboxylate ligands. The hxl topology MOF, termed GUF-14 (GUF = Glasgow University Framework), can be exfoliated into monolayer thickness hns topology MONs, and acid-induced removal of capping modulator units yields MONs with enhanced catalytic activity toward the formation of imines and the hydrolysis of an organophosphate nerve agent mimic. The discovery of GUF-14 serves as a valuable example of the undiscovered MOF/MON structural diversity extant in established metal-ligand systems that can be accessed by harnessing the power of modulated self-assembly protocols.
وصف الملف: text
العلاقة: https://eprints.whiterose.ac.uk/211509/1/prasad-et-al-2024-modulated-self-assembly-of-catalytically-active-metal-organic-nanosheets-containing-zr6-clusters-and.pdfTest; Prasad, R.R.R. orcid.org/0000-0002-8724-6358 , Boyadjieva, S.S., Zhou, G. et al. (7 more authors) (2024) Modulated self-assembly of catalytically active metal–organic nanosheets containing Zr6 clusters and dicarboxylate ligands. ACS Applied Materials & Interfaces, 16 (14). pp. 17812-17820. ISSN 1944-8244
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3دورية أكاديمية
المؤلفون: Walsh, D.A., Lake, D.S., Snedden, E.W., Cliffe, M.J., Graham, D.M., Jamison, S.P.
الوصف: The sub-luminal phase velocity of electromagnetic waves in free space is generally unobtainable, being closely linked to forbidden faster than light group velocities. The requirement of sub-luminal phase-velocity in laser-driven particle acceleration schemes imposes a limit on the total acceleration achievable in free space, and necessitates the use of dispersive structures or waveguides for extending the field-particle interaction. We demonstrate a travelling source approach that overcomes the sub-luminal propagation limits. The approach exploits ultrafast optical sources with slow group velocity propagation, and a group-to-phase front conversion through nonlinear optical interaction. The concept is demonstrated with two terahertz generation processes, nonlinear optical rectification and current-surge rectification. We report measurements of longitudinally polarised single-cycle electric fields with phase and group velocity between 0.77c and 1.75c. The ability to scale to multi-megavolt-per-metre field strengths is demonstrated. Our approach paves the way towards the realisation of cheap and compact particle accelerators with femtosecond scale control of particles.
وصف الملف: application/pdf
العلاقة: https://eprints.lancs.ac.uk/id/eprint/125961/1/Walsh_travellingwaveTHz_NatComms2017.pdfTest; Walsh, D.A. and Lake, D.S. and Snedden, E.W. and Cliffe, M.J. and Graham, D.M. and Jamison, S.P. (2017) Demonstration of sub-luminal propagation of single-cycle terahertz pulses for particle acceleration. Nature Communications, 8 (1): 421. ISSN 2041-1723
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4دورية أكاديمية
المؤلفون: Cliffe, M.J, Castillo-Martínez, E, Wu, Y, Lee, J, Forse, A.C, Firth, F.C.N, Moghadam, P.Z, Fairen-Jimenez, D, Gaultois, M.W, Hill, J.A, Magdysyuk, O.V, Slater, B, Goodwin, A.L, Grey, C.P
المساهمون: DEPT OF MATERIALS SCIENCE & ENGINEERING
المصدر: Unpaywall 20201031
مصطلحات موضوعية: Carboxylation, Crystalline materials, Hafnium, Indium compounds, Lead compounds, Ligands, Nanosheets, Organometallics, Coordination polyhedra, Crystallographic shear planes, Face-centered cubic, Metal organic, Metal organic framework, Structural mechanisms, Two-dimensional materials, Two-dimensional metals, Defects, formic acid, metal organic nanosheet, nanosheet, unclassified drug, Article, cell size, crystal structure, crystallization, density functional theory, energy dispersive X ray spectroscopy, nanomedicine, nuclear magnetic resonance imaging, small angle scattering
الوصف: 10.1021/jacs.7b00106 ; Journal of the American Chemical Society ; 139 ; 15 ; 5397-5404
العلاقة: Cliffe, M.J, Castillo-Martínez, E, Wu, Y, Lee, J, Forse, A.C, Firth, F.C.N, Moghadam, P.Z, Fairen-Jimenez, D, Gaultois, M.W, Hill, J.A, Magdysyuk, O.V, Slater, B, Goodwin, A.L, Grey, C.P (2017). Metal-Organic Nanosheets Formed via Defect-Mediated Transformation of a Hafnium Metal-Organic Framework. Journal of the American Chemical Society 139 (15) : 5397-5404. ScholarBank@NUS Repository. https://doi.org/10.1021/jacs.7b00106Test; https://scholarbank.nus.edu.sg/handle/10635/183860Test
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5دورية أكاديمية
المؤلفون: Cliffe, M.J., Graham, D.M., Jamison, S.P.
الوصف: We demonstrate the generation of single-cycle longitudinally polarized terahertz pulses with field amplitudes in excess of 11 kV/cm using the interferometric recombination of two linearly polarized terahertz beams. High field strength transversely polarized pulses were generated by optical rectification in a matched pair of magnesium-oxide doped stoichiometric lithium niobate (MgO:SLN) crystals with a reversal in the v ð2Þ 333 orientation. The discontinuity in v ð2Þ 333 produces a polarity flip in the transverse field; the longitudinal field produced as a consequence of the transverse field discontinuity was measured in the far-field. Both the spatial and temporal profiles of the measured longitudinally polarized terahertz radiation were consistent with the propagation of the transverse discontinuity.
العلاقة: Cliffe, M.J. and Graham, D.M. and Jamison, S.P. (2016) Longitudinally polarized single-cycle terahertz pulses generated with high electric field strengths. Applied Physics Letters, 108 (22). ISSN 0003-6951
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6دورية أكاديمية
المؤلفون: Cliffe, M.J., Rodak, A., Graham, D.M., Jamison, S.P.
الوصف: We demonstrate the generation of near-single cycle longitudinally polarized terahertz radiation using a large-area radially biased photoconductive antenna with a longitudinal field amplitude in excess of 2 kV/cm. The 76 mm diameter antenna was photo-excited by a 0.5 mJ amplified nearinfrared femtosecond laser system and biased with a voltage of up to 100 kV applied over concentric electrodes. Amplitudes for both the transverse and longitudinal field components of the source were measured using a calibrated electro-optic detection scheme. By tightly focusing the radiation emitted from the photoconductive antenna, we obtained a maximum longitudinal field amplitude of 2.22 kV/cm with an applied bias field of 38.5 kV/cm.
العلاقة: Cliffe, M.J. and Rodak, A. and Graham, D.M. and Jamison, S.P. (2014) Generation of longitudinally polarized terahertz pulses with field amplitudes exceeding 2 kV/cm. Applied Physics Letters, 105 (19). ISSN 0003-6951
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7دورية أكاديمية
المؤلفون: Walsh, D.A., Cliffe, M.J., Pan, R., Snedden, E.W., Graham, D.M., Gillespie, W.A., Jamison, S.P.
الوصف: A general description of electro-optic detection including non-collinear phase matching and finite transverse beam profiles is presented. It is shown theoretically and experimentally that non-collinear phase matching in ZnTe (and similar materials) produces an angular chirp in the χ(2)-generated optical signal. Due to this, in non-collinear THz and probe arrangements such as single-shot THz measurements or through accidental misalignment, measurement of an undistorted THz signal is critically dependent on having sufficient angular acceptance in the optical probe path. The associated spatial walk-off can also preclude the phase retardation approximation used in THz-TDS. The rate of misalignment-induced chirping in commonly used ZnTe and GaP schemes is tabulated, allowing ready analysis of a detection system.
العلاقة: Walsh, D.A. and Cliffe, M.J. and Pan, R. and Snedden, E.W. and Graham, D.M. and Gillespie, W.A. and Jamison, S.P. (2014) Role of misalignment-induced angular chirp in the electro-optic detection of THz waves. Optics Express, 22 (10). pp. 12028-12037. ISSN 1094-4087
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8
المؤلفون: Overy, A.R., Cairns, A.B., Cliffe, M.J., Simonov, A., Tucker, M.G., Goodwin, A.L.
المصدر: 'Nature Communications ', vol: 7, pages: 10445-1-10445-8 (2016)
الوصف: Functional materials design normally focuses on structurally ordered systems because disorder is considered detrimental to many functional properties. Here we challenge this paradigm by showing that particular types of strongly correlated disorder can give rise to useful characteristics that are inaccessible to ordered states. A judicious combination of low-symmetry building unit and high-symmetry topological template leads to aperiodic ‘procrystalline’ solids that harbour this type of disorder. We identify key classes of procrystalline states together with their characteristic diffraction behaviour, and establish mappings onto known and target materials. The strongly correlated disorder found in these systems is associated with specific sets of modulation periodicities distributed throughout the Brillouin zone. Lattice dynamical calculations reveal selective disorder-driven phonon broadening that resembles the poorly understood ‘waterfall’ effect observed in relaxor ferroelectrics. This property of procrystalline solids suggests a mechanism by which strongly correlated topological disorder might allow independently optimized thermal and electronic transport behaviour, such as required for high-performance thermoelectrics.
وصف الملف: application/pdf
الوصول الحر: https://explore.openaire.eu/search/publication?articleId=illesrfpubli::086f81864b25533f3430657eea41da86Test
https://epn-library.esrf.fr/flora/jsp/index_view_direct_anonymous.jsp?record=doc:PUB_ESRF:47906Test -
9دورية أكاديمية
المؤلفون: CLIFFE, M.J.
المصدر: Journal of the Institute of Mental Subnormality (APEX) ; volume 2, issue 1, page 22-23 ; ISSN 0141-2205
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10دورية أكاديمية
المؤلفون: Elbadawy, M.H.F., Cliffe, M.J., James, P.T.
المصدر: The Canadian Journal of Psychiatry ; volume 30, issue 7, page 544-545 ; ISSN 0706-7437 1497-0015
مصطلحات موضوعية: Psychiatry and Mental health
الوصف: This case study describes a female monozygotic twin-ship in which one of the twins presented with anorexia nervosa. The case supports the suggestion from the few such discordant pairs previously reported that the affected twin tends to have been relatively disadvantaged from an early age and to be the less dominant of the pair. A review of previously reported cases suggests a concordance rate for anorexia nervosa of about 50% in female MZ twin pairs. Some methodological problems associated with the derivation of such estimates are noted.
