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Ionic liquid passivated black phosphorus for stabilized compliant electronics

Nano Research 2023年第5期16卷 7858-7866页

作者： Ravindra Mehta Misook Min Ridwan F.Hossain Gustavo A.Saenz gerardo gamboa Anupama B.Kaul Department of Materials Science and Engineering PACCAR Technology InstituteUniversity of North TexasDentonTX 76207USA Department of Electrical Engineering University of North TexasDentonTX 76207USA

Black phosphorus(BP)is an attractive material for two-dimensional(2D)electronics and optoelectronics given its direct optical band gap in the ***,the vulnerability of BP to oxygen and moisture under ambient conditions has been a significant impediment for the adoption of this material towards practical *** vulnerability has also curtailed the development of additively manufactured,solution processed,ink-jet printed BP devices,which are cost-effective alternatives to lithographically patterned rigid electronics and optoelectronics based on *** this work,we have fabricated stable BP electronic devices on flexible and compliant substrates using low-cost,additive manufacturing techniques with ink-jet printing through scalable chemical exfoliation *** address the stability issues with BP,ionic liquids(ILs)were used as a passivation layer on the surface of the BP to minimize oxidative *** enhanced stability of BP was inferred through Raman spectroscopy and scanning probe microscopy techniques,where no observable changes in the A^(1)_(g)and A^(2)_(g)Raman vibrational modes were observed with time for the BP films passivated with ILs over a period of 168 h under ambient *** the other hand,a blue-shift in these Raman modes was evident for unpassivated *** probe microscopy measurements clearly revealed the difference in the surface characteristics through localized regions of degradation that intensified with time,which was clearly absent in IL/BP *** stability measurements were also conducted in electronic device platforms for IL coated BP devices,where the temperature T dependence of the I_(ds)-V_(ds)characteristic was measured from T~5.4 to 335 *** demonstrations of stabilized ILs/BP devices at ambient printed on flexible polyimide substrates were also *** irradiation with broadband radiation appears to have a significant influence on the electrical behavior of BP,evident through t

关键词： 2D materials black phosphorus ionic liquids ink-jet printing flexible electronics

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Host-parasite interactions in perpetual darkness:Macroparasite diversity in the cavefish Astyanax mexicanus

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Zoological Research 2023年第4期44卷 782-792页

作者： Ana Santacruz David Hernández-Mena Ramses Miranda-gamboa gerardo Pérez-Ponce De León Claudia Patricia Ornelas-García Departamento de Zoología Instituto de BiologíaUniversidad Nacional Autónoma de MéxicoMéxico City CP 04510México Departamento de Sistemas y Procesos Naturales Escuela Nacional de Estudios Superiores Unidad MéridaUcúYucatán CP 97357México Instituto de Energías Renovables Universidad Nacional Autónoma de MéxicoTemixcoMorelos CP 62580México Colección Nacional de Peces Departamento de ZoologíaInstituto de BiologíaUniversidad Nacional Autónoma de MéxicoMéxico City CP 04510México Stowers Institute for Medical Research Kansas CityMO 64110USA

Astyanax mexicanus has repeatedly colonized cave environments,displaying evolutionary parallelisms in many troglobitic *** being a model system for the study of adaptation to life in perpetual darkness,the parasites that infect cavefish are practically *** this study,we investigated the macroparasite communities in 18 cavefish populations from independent lineages and compared them with the parasite diversity found in their sister surface fish populations,with the aim of better understanding the role that parasites play in the colonization of new *** the cavefish populations,we identified 13 parasite taxa,including a subset of 10 of the 27 parasite taxa known for the surface *** infecting the cavefish belong to five taxonomic groups,including trematodes,monogeneans,nematodes,copepods,and *** are the most dominant group,found in 14 *** macroparasites include species with direct life cycles and trophic transmission,including invasive ***,paired comparisons indicate higher parasite richness in the cavefish than in the surface *** variation in parasite composition across the caves suggests historical and geographical contingencies in the host-parasite colonization process and potential evolution of local *** base-line data on parasite diversity in cavefish populations of *** provides a foundation to explore the role of divergent parasite infections under contrasting ecological pressures(cave *** environments)in the evolution of cave adaptive traits.

关键词： Adaptation Metazoan parasites Niche change Parasite assemblage Prevalence

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Host-parasite interactions in perpetual darkness: Macroparasite diversity in the cavefish Astyanax mexicanus

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动物学研究 2023年第4期

作者： Ana Santacruz David Hernández-Mena Ramses Miranda-gamboa gerardo Pérez-Ponce De León Claudia Patricia Ornelas-García

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