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Kasprzyk-Hordern B, Adams B, Adewale ID, Agunbiade FO, Akinyemi MI, Archer E, Badru FA, Barnett J, Bishop IJ, Di Lorenzo M, Estrela P, Faraway J, Fasona MJ, Fayomi SA, Feil EJ, Hyatt LJ, Irewale AT, Kjeldsen T, Lasisi AKS, Loiselle S, Louw TM, Metcalfe B, Nmormah SA, Oluseyi TO, Smith TR, Snyman MC, Sogbanmu TO, Stanton-Fraser D, Surujlal-Naicker S, Wilson PR, Wolfaardt G, Yinka-Banjo CO. Wastewater-based epidemiology in hazard forecasting and early-warning systems for global health risks. Environ Int 2022; 161:107143. [PMID: 35176575 PMCID: PMC8842583 DOI: 10.1016/j.envint.2022.107143] [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] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/21/2021] [Revised: 01/20/2022] [Accepted: 02/07/2022] [Indexed: 05/17/2023]
Abstract
With the advent of the SARS-CoV-2 pandemic, Wastewater-Based Epidemiology (WBE) has been applied to track community infection in cities worldwide and has proven succesful as an early warning system for identification of hotspots and changingprevalence of infections (both symptomatic and asymptomatic) at a city or sub-city level. Wastewater is only one of environmental compartments that requires consideration. In this manuscript, we have critically evaluated the knowledge-base and preparedness for building early warning systems in a rapidly urbanising world, with particular attention to Africa, which experiences rapid population growth and urbanisation. We have proposed a Digital Urban Environment Fingerprinting Platform (DUEF) - a new approach in hazard forecasting and early-warning systems for global health risks and an extension to the existing concept of smart cities. The urban environment (especially wastewater) contains a complex mixture of substances including toxic chemicals, infectious biological agents and human excretion products. DUEF assumes that these specific endo- and exogenous residues, anonymously pooled by communities' wastewater, are indicative of community-wide exposure and the resulting effects. DUEF postulates that the measurement of the substances continuously and anonymously pooled by the receiving environment (sewage, surface water, soils and air), can provide near real-time dynamic information about the quantity and type of physical, biological or chemical stressors to which the surveyed systems are exposed, and can create a risk profile on the potential effects of these exposures. Successful development and utilisation of a DUEF globally requires a tiered approach including: Stage I: network building, capacity building, stakeholder engagement as well as a conceptual model, followed by Stage II: DUEF development, Stage III: implementation, and Stage IV: management and utilization. We have identified four key pillars required for the establishment of a DUEF framework: (1) Environmental fingerprints, (2) Socioeconomic fingerprints, (3) Statistics and modelling and (4) Information systems. This manuscript critically evaluates the current knowledge base within each pillar and provides recommendations for further developments with an aim of laying grounds for successful development of global DUEF platforms.
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Affiliation(s)
| | - B Adams
- Department of Mathematical Sciences, University of Bath, BA2 7AY, UK
| | - I D Adewale
- Department of Electrical and Electronics Engineering, University of Lagos, 100213 Akoka, Lagos, Nigeria
| | - F O Agunbiade
- Department of Chemistry, Faculty of Science, University of Lagos, Akoka, Lagos, Nigeria
| | - M I Akinyemi
- Department of Mathematics, University of Lagos, Akoka, Lagos, Nigeria
| | - E Archer
- Department of Microbiology, Stellenbosch University, 7600 Stellenbosch, South Africa
| | - F A Badru
- Department of Social Work, University of Lagos, Akoka, Lagos, Nigeria
| | - J Barnett
- Department of Psychology, University of Bath, BA2 7AY, UK
| | - I J Bishop
- Earthwatch Europe, Mayfield House, 256 Banbury Road, Summertown, Oxford OX2 7DE, UK
| | - M Di Lorenzo
- Department of Chemical Engineering, University of Bath, BA2 7AY Bath, UK
| | - P Estrela
- Department of Electronic and Electrical Engineering, University of Bath, BA2 7AY, UK
| | - J Faraway
- Department of Mathematical Sciences, University of Bath, BA2 7AY, UK
| | - M J Fasona
- Department of Geography, University of Lagos, Akoka, Lagos, Nigeria
| | - S A Fayomi
- Research for Sustainable Development Unit, Peculiar Grace Youth Empowerment Initiative, Shasha, Lagos, Nigeria
| | - E J Feil
- Department of Biology and Biochemistry, University of Bath, BA2 7AY, UK
| | - L J Hyatt
- Amazon Web Services, 60 Holborn Viaduct, Holborn, London EC1A 2FD, United Kingdom
| | - A T Irewale
- Research for Sustainable Development Unit, Peculiar Grace Youth Empowerment Initiative, Shasha, Lagos, Nigeria
| | - T Kjeldsen
- Department of Architecture and Civil Engineering, University of Bath, BA2 7AY, UK
| | - A K S Lasisi
- Environmental Assessment Department, Lagos State Ministry of Environment and Water Resources, Lagos, Nigeria
| | - S Loiselle
- Earthwatch Europe, Mayfield House, 256 Banbury Road, Summertown, Oxford OX2 7DE, UK
| | - T M Louw
- Department of Process Engineering, Stellenbosch University, Stellenbosch, South Africa
| | - B Metcalfe
- Department of Electronic and Electrical Engineering, University of Bath, BA2 7AY, UK
| | - S A Nmormah
- Centre for Human Development (CHD), Lagos, Nigeria
| | - T O Oluseyi
- Department of Chemistry, Faculty of Science, University of Lagos, Akoka, Lagos, Nigeria
| | - T R Smith
- Department of Mathematical Sciences, University of Bath, BA2 7AY, UK
| | - M C Snyman
- TecLab SP, Collaborator of Stellenbosch University Water Institute, Stellenbosch 64B. W, South Africa
| | - T O Sogbanmu
- Ecotoxicology and Conservation Unit, Department of Zoology, Faculty of Science, University of Lagos, Akoka, Lagos, Nigeria
| | | | - S Surujlal-Naicker
- Scientific Services Branch, Water and Sanitation Department, City of Cape Town Metropolitan Municipality, Cape Town, South Africa
| | - P R Wilson
- Department of Electronic and Electrical Engineering, University of Bath, BA2 7AY, UK
| | - G Wolfaardt
- Department of Microbiology, Stellenbosch University, 7600 Stellenbosch, South Africa
| | - C O Yinka-Banjo
- Department of Computer Sciences, University of Lagos, Akoka, Lagos, Nigeria
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Aliakbarinodehi N, Jolly P, Bhalla N, Miodek A, De Micheli G, Estrela P, Carrara S. Aptamer-based Field-Effect Biosensor for Tenofovir Detection. Sci Rep 2017; 7:44409. [PMID: 28294122 PMCID: PMC5353720 DOI: 10.1038/srep44409] [Citation(s) in RCA: 47] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2016] [Accepted: 02/02/2017] [Indexed: 01/10/2023] Open
Abstract
During medical treatment it is critical to maintain the circulatory concentration of drugs within their therapeutic range. A novel biosensor is presented in this work to address the lack of a reliable point-of-care drug monitoring system in the market. The biosensor incorporates high selectivity and sensitivity by integrating aptamers as the recognition element and field-effect transistors as the signal transducer. The drug tenofovir was used as a model small molecule. The biointerface of the sensor is a binary self-assembled monolayer of specific thiolated aptamer and 6-mercapto-1-hexanol (MCH), whose ratio was optimized by electrochemical impedance spectroscopy measurements to enhance the sensitivity towards the specific target. Surface plasmon resonance, performed under different buffer conditions, shows optimum specific and little non-specific binding in phosphate buffered saline. The dose-response behavior of the field-effect biosensor presents a linear range between 1 nM and 100 nM of tenofovir and a limit of detection of 1.2 nM. Two non-specific drugs and one non-specific aptamer, tested as stringent control candidates, caused negligible responses. The applications were successfully extended to the detection of the drug in human serum. As demonstrated by impedance measurements, the aptamer-based sensors can be used for real-time drug monitoring.
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Affiliation(s)
- N Aliakbarinodehi
- School of Engineering, École Polytechnique Fédérale de Lausanne (EPFL), STI-IEL-LSI2, Building INF, 3rd floor, 1015 Lausanne, Switzerland
| | - P Jolly
- Department of Electronic and Electrical Engineering, University of Bath, Claverton Down, BA2 7AY Bath, United Kingdom
| | - N Bhalla
- Department of Electronic and Electrical Engineering, University of Bath, Claverton Down, BA2 7AY Bath, United Kingdom
| | - A Miodek
- Department of Electronic and Electrical Engineering, University of Bath, Claverton Down, BA2 7AY Bath, United Kingdom
| | - G De Micheli
- School of Engineering, École Polytechnique Fédérale de Lausanne (EPFL), STI-IEL-LSI2, Building INF, 3rd floor, 1015 Lausanne, Switzerland
| | - P Estrela
- Department of Electronic and Electrical Engineering, University of Bath, Claverton Down, BA2 7AY Bath, United Kingdom
| | - S Carrara
- School of Engineering, École Polytechnique Fédérale de Lausanne (EPFL), STI-IEL-LSI2, Building INF, 3rd floor, 1015 Lausanne, Switzerland
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Aboagye EO, Aigbirhio FI, Allen P, Arent R, Arrowsmith RL, Banci G, Bagley MC, Bailey CD, Blake T, Bunt AJ, Bushby N, Carroll L, Cons BD, Cortezon F, Dilworth JR, Dorff PN, Eggleston IM, Ellames G, Elmore CS, Ernst G, Estrela P, Faithfull J, Ge H, Geach NJ, Hall J, Harding J, Harwood LM, Hickey MJ, Heys JR, Hogg C, Hudson MJ, James T, Kerr WJ, Killick D, Kingston LP, Kociok-Köhn G, Landvatter S, Lewis F, Lockley WJS, Marken F, Mudd RJ, Pascu SI, Pheko T, Powell ME, Reid M, Riss PJ, Ruhl T, Rustidge DC, Schenk DJ, Schofield C, Schweiger L, Sharma P, Smith D, Tuttle CTT, Testa A, Tyson JA, Tyrrell RM, Urbanek R, Wilkinson DJ, Willis CL, Zanda M. Abstracts of the 22nd International Isotope Society (UK Group) Symposium: synthesis and applications of labelled compounds 2013. J Labelled Comp Radiopharm 2014. [DOI: 10.1002/jlcr.3173] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- E. O. Aboagye
- Department of Chemistry, Faculty of Engineering and Physical Sciences; University of Surrey; Guildford Surrey GU2 7XH UK
| | - F. I. Aigbirhio
- Department of Chemistry, Faculty of Engineering and Physical Sciences; University of Surrey; Guildford Surrey GU2 7XH UK
| | - P. Allen
- Department of Chemistry, Faculty of Engineering and Physical Sciences; University of Surrey; Guildford Surrey GU2 7XH UK
| | - R. Arent
- Department of Chemistry, Faculty of Engineering and Physical Sciences; University of Surrey; Guildford Surrey GU2 7XH UK
| | - R. L. Arrowsmith
- Department of Chemistry, Faculty of Engineering and Physical Sciences; University of Surrey; Guildford Surrey GU2 7XH UK
| | - G. Banci
- Department of Chemistry, Faculty of Engineering and Physical Sciences; University of Surrey; Guildford Surrey GU2 7XH UK
| | - M. C. Bagley
- Department of Chemistry, Faculty of Engineering and Physical Sciences; University of Surrey; Guildford Surrey GU2 7XH UK
| | - C. D. Bailey
- Department of Chemistry, Faculty of Engineering and Physical Sciences; University of Surrey; Guildford Surrey GU2 7XH UK
| | - T. Blake
- Department of Chemistry, Faculty of Engineering and Physical Sciences; University of Surrey; Guildford Surrey GU2 7XH UK
| | - A. J. Bunt
- Department of Chemistry, Faculty of Engineering and Physical Sciences; University of Surrey; Guildford Surrey GU2 7XH UK
| | - N. Bushby
- Department of Chemistry, Faculty of Engineering and Physical Sciences; University of Surrey; Guildford Surrey GU2 7XH UK
| | - L. Carroll
- Department of Chemistry, Faculty of Engineering and Physical Sciences; University of Surrey; Guildford Surrey GU2 7XH UK
| | - B. D. Cons
- Department of Chemistry, Faculty of Engineering and Physical Sciences; University of Surrey; Guildford Surrey GU2 7XH UK
| | - F. Cortezon
- Department of Chemistry, Faculty of Engineering and Physical Sciences; University of Surrey; Guildford Surrey GU2 7XH UK
| | - J. R. Dilworth
- Department of Chemistry, Faculty of Engineering and Physical Sciences; University of Surrey; Guildford Surrey GU2 7XH UK
| | - P. N. Dorff
- Department of Chemistry, Faculty of Engineering and Physical Sciences; University of Surrey; Guildford Surrey GU2 7XH UK
| | - I. M. Eggleston
- Department of Chemistry, Faculty of Engineering and Physical Sciences; University of Surrey; Guildford Surrey GU2 7XH UK
| | - G. Ellames
- Department of Chemistry, Faculty of Engineering and Physical Sciences; University of Surrey; Guildford Surrey GU2 7XH UK
| | - C. S. Elmore
- Department of Chemistry, Faculty of Engineering and Physical Sciences; University of Surrey; Guildford Surrey GU2 7XH UK
| | - G. Ernst
- Department of Chemistry, Faculty of Engineering and Physical Sciences; University of Surrey; Guildford Surrey GU2 7XH UK
| | - P. Estrela
- Department of Chemistry, Faculty of Engineering and Physical Sciences; University of Surrey; Guildford Surrey GU2 7XH UK
| | - J. Faithfull
- Department of Chemistry, Faculty of Engineering and Physical Sciences; University of Surrey; Guildford Surrey GU2 7XH UK
| | - H. Ge
- Department of Chemistry, Faculty of Engineering and Physical Sciences; University of Surrey; Guildford Surrey GU2 7XH UK
| | - N. J. Geach
- Department of Chemistry, Faculty of Engineering and Physical Sciences; University of Surrey; Guildford Surrey GU2 7XH UK
| | - J. Hall
- Department of Chemistry, Faculty of Engineering and Physical Sciences; University of Surrey; Guildford Surrey GU2 7XH UK
| | - J. Harding
- Department of Chemistry, Faculty of Engineering and Physical Sciences; University of Surrey; Guildford Surrey GU2 7XH UK
| | - L. M. Harwood
- Department of Chemistry, Faculty of Engineering and Physical Sciences; University of Surrey; Guildford Surrey GU2 7XH UK
| | - M. J. Hickey
- Department of Chemistry, Faculty of Engineering and Physical Sciences; University of Surrey; Guildford Surrey GU2 7XH UK
| | - J. R. Heys
- Department of Chemistry, Faculty of Engineering and Physical Sciences; University of Surrey; Guildford Surrey GU2 7XH UK
| | - C. Hogg
- Department of Chemistry, Faculty of Engineering and Physical Sciences; University of Surrey; Guildford Surrey GU2 7XH UK
| | - M. J. Hudson
- Department of Chemistry, Faculty of Engineering and Physical Sciences; University of Surrey; Guildford Surrey GU2 7XH UK
| | - T. James
- Department of Chemistry, Faculty of Engineering and Physical Sciences; University of Surrey; Guildford Surrey GU2 7XH UK
| | - W. J. Kerr
- Department of Chemistry, Faculty of Engineering and Physical Sciences; University of Surrey; Guildford Surrey GU2 7XH UK
| | - D. Killick
- Department of Chemistry, Faculty of Engineering and Physical Sciences; University of Surrey; Guildford Surrey GU2 7XH UK
| | - L. P. Kingston
- Department of Chemistry, Faculty of Engineering and Physical Sciences; University of Surrey; Guildford Surrey GU2 7XH UK
| | - G. Kociok-Köhn
- Department of Chemistry, Faculty of Engineering and Physical Sciences; University of Surrey; Guildford Surrey GU2 7XH UK
| | - S. Landvatter
- Department of Chemistry, Faculty of Engineering and Physical Sciences; University of Surrey; Guildford Surrey GU2 7XH UK
| | - F. Lewis
- Department of Chemistry, Faculty of Engineering and Physical Sciences; University of Surrey; Guildford Surrey GU2 7XH UK
| | - W. J. S. Lockley
- Department of Chemistry, Faculty of Engineering and Physical Sciences; University of Surrey; Guildford Surrey GU2 7XH UK
| | - F. Marken
- Department of Chemistry, Faculty of Engineering and Physical Sciences; University of Surrey; Guildford Surrey GU2 7XH UK
| | - R. J. Mudd
- Department of Chemistry, Faculty of Engineering and Physical Sciences; University of Surrey; Guildford Surrey GU2 7XH UK
| | - S. I. Pascu
- Department of Chemistry, Faculty of Engineering and Physical Sciences; University of Surrey; Guildford Surrey GU2 7XH UK
| | - T. Pheko
- Department of Chemistry, Faculty of Engineering and Physical Sciences; University of Surrey; Guildford Surrey GU2 7XH UK
| | - M. E. Powell
- Department of Chemistry, Faculty of Engineering and Physical Sciences; University of Surrey; Guildford Surrey GU2 7XH UK
| | - M Reid
- Department of Chemistry, Faculty of Engineering and Physical Sciences; University of Surrey; Guildford Surrey GU2 7XH UK
| | - P. J. Riss
- Department of Chemistry, Faculty of Engineering and Physical Sciences; University of Surrey; Guildford Surrey GU2 7XH UK
| | - T. Ruhl
- Department of Chemistry, Faculty of Engineering and Physical Sciences; University of Surrey; Guildford Surrey GU2 7XH UK
| | - D. C. Rustidge
- Department of Chemistry, Faculty of Engineering and Physical Sciences; University of Surrey; Guildford Surrey GU2 7XH UK
| | - D. J. Schenk
- Department of Chemistry, Faculty of Engineering and Physical Sciences; University of Surrey; Guildford Surrey GU2 7XH UK
| | - C. Schofield
- Department of Chemistry, Faculty of Engineering and Physical Sciences; University of Surrey; Guildford Surrey GU2 7XH UK
| | - L. Schweiger
- Department of Chemistry, Faculty of Engineering and Physical Sciences; University of Surrey; Guildford Surrey GU2 7XH UK
| | - P. Sharma
- Department of Chemistry, Faculty of Engineering and Physical Sciences; University of Surrey; Guildford Surrey GU2 7XH UK
| | - D. Smith
- Department of Chemistry, Faculty of Engineering and Physical Sciences; University of Surrey; Guildford Surrey GU2 7XH UK
| | - C. T. T. Tuttle
- Department of Chemistry, Faculty of Engineering and Physical Sciences; University of Surrey; Guildford Surrey GU2 7XH UK
| | - A. Testa
- Department of Chemistry, Faculty of Engineering and Physical Sciences; University of Surrey; Guildford Surrey GU2 7XH UK
| | - J. A. Tyson
- Department of Chemistry, Faculty of Engineering and Physical Sciences; University of Surrey; Guildford Surrey GU2 7XH UK
| | - R. M. Tyrrell
- Department of Chemistry, Faculty of Engineering and Physical Sciences; University of Surrey; Guildford Surrey GU2 7XH UK
| | - R. Urbanek
- Department of Chemistry, Faculty of Engineering and Physical Sciences; University of Surrey; Guildford Surrey GU2 7XH UK
| | - D. J. Wilkinson
- Department of Chemistry, Faculty of Engineering and Physical Sciences; University of Surrey; Guildford Surrey GU2 7XH UK
| | - C. L. Willis
- Department of Chemistry, Faculty of Engineering and Physical Sciences; University of Surrey; Guildford Surrey GU2 7XH UK
| | - M. Zanda
- Department of Chemistry, Faculty of Engineering and Physical Sciences; University of Surrey; Guildford Surrey GU2 7XH UK
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Gonçalves AP, Estrela P, de Visser A, Lopes EB, Catarino I, Bonfait G, Godinho M, Almeida M, Gnida D, Kaczorowski D. Single-crystal study on the heavy-fermion antiferromagnet UZn₁₂. J Phys Condens Matter 2011; 23:045602. [PMID: 21406890 DOI: 10.1088/0953-8984/23/4/045602] [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] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Millimetre size UZn(12) single crystals were grown by the high temperature solution growth method using zinc as the solvent. Single-crystal x-ray diffraction data confirm that this compound crystallizes in the hexagonal high temperature form of SmZn(12) (S.G. P6/mmm) and points to a U(1.01(1))Zn(11.7(1)) stoichiometry for the crystals, with ∼ 4% of the U atoms being located at the 2c site due to the partial substitution of 4h Zn pairs. UZn(12) orders antiferromagnetically at T(N) = 5.0(2) K, and the magnetization and resistivity measurements suggest that the magnetic moments are confined within the a-b plane. The Sommerfeld coefficient, derived from the paramagnetic region by the standard method, is γ(p)≈200 mJ (mol K(2))( - 1), which definitely classifies UZn(12) as a moderate heavy-fermion system. The heavy-fermion character of UZn(12) is also manifested in the overall shape of temperature-dependent electrical resistivity that is dominated by a single-ion Kondo effect at high temperatures and coherent Kondo scattering at low temperatures. The paramagnetic magnetoresistivity isotherms can be fairly well superimposed onto each other using Schlottmann's scaling for the single-ion Kondo model, as expected for a Kondo system.
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Affiliation(s)
- A P Gonçalves
- Departamento de Química, Instituto Tecnológico e Nuclear, P-2686-953 Sacavém, Portugal.
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Estrela P, Migliorato P, Takiguchi H, Fukushima H, Nebashi S. Electrical detection of biomolecular interactions with metal–insulator–semiconductor diodes. Biosens Bioelectron 2005; 20:1580-6. [PMID: 15626612 DOI: 10.1016/j.bios.2004.08.010] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2004] [Revised: 08/04/2004] [Accepted: 08/04/2004] [Indexed: 11/21/2022]
Abstract
We report the label-free detection of DNA hybridization using a metal-insulator-semiconductor (MIS) diode or capacitor. Upon immobilization of single-stranded DNA on the gold gate of a MIS capacitor, the capacitance versus voltage characteristics show a significant shift in the direction of negative voltages as expected from the immobilization of negative charges on the gate. The hybridization with the complementary strand gives rise to a further significant shift in the same direction as before, which is consistent with the increase of negative charges on the gate brought about by the hybridization. Fluorescence studies indicate that the immobilization and hybridization of DNA can be electrostatically promoted by electric fields externally applied to the MIS capacitors. The MIS diode detection method is applicable to all biomolecular interactions that affect the surface dipole at the interface between the metal gate and the electrolyte and can be extended to other chemical and biochemical systems such as proteins and cells.
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Affiliation(s)
- P Estrela
- Engineering Department, University of Cambridge, Trumpington Street, Cambridge CB2 1PZ, UK.
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Graf MJ, Estrela P, Amato A, Baines C, Andreica D, Gygax FN, Schenck A. Magnetic quantum critical point and superconductivity in UPt3 doped with Pd. Phys Rev Lett 2000; 85:3005-3008. [PMID: 11005989 DOI: 10.1103/physrevlett.85.3005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/30/2000] [Indexed: 05/23/2023]
Abstract
Transverse-field muon spin relaxation measurements have been carried out on the heavy-fermion superconductor UPt (3) doped with small amounts of Pd. We find that the critical Pd concentration for the emergence of the large-moment antiferromagnetic phase is approximately 0.6 at. %Pd. At the same Pd content, superconductivity is completely suppressed. The existence of a magnetic quantum critical point in the phase diagram, which coincides with the critical point for superconductivity, provides evidence for ferromagnetic spin-fluctuation mediated odd-parity superconductivity, which competes with antiferromagnetic order.
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Bonfait G, Godinho M, Estrela P, Gonçalves AP, Almeida M, Spirlet JC. Giant-magnetoresistance anomaly associated with a magnetization process in UFe4Al8. Phys Rev B Condens Matter 1996; 53:R480-R483. [PMID: 9983060 DOI: 10.1103/physrevb.53.r480] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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