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Low-Cost and Biodegradable Thermoelectric Devices Based on van der Waals Semiconductors on Paper Substrates

Energy & Environmental Materials 2024年第1期7卷 201-206页

作者： Gulsum Ersu Carmen Munuera Federico J.Mompean Daniel Vaquero Jorge Quereda João Elias F.S.Rodrigues Jose A.Alonso Eduardo Flores Jose R.Ares Isabel J.Ferrer Abdullah M.Al-Enizi Ayman Nafady sruthi kuriakose Joshua O.Island Andres Castellanos-Gomez Materials Science Factory Instituto de Ciencia de Materiales de Madrid(ICMM-CSIC)Madrid E-28049Spain Nanotechnology Group USAL-NanolabUnivesidad de SalamancaSalamanca Junta de Castilla y León 37007Spain GISC Departamento de Física de MaterialesUniversidad Complutense de MadridMadrid E-28040Spain Departamento de Física Aplicada Centro de Investigación y Estudios AvanzadosMérida 97310Mexico MIRE Group Departamento de Física de MaterialesUniversidad Autónoma de MadridMadrid E-28049Spain Instituto Nicolás Cabrera Universidad Autónoma de MadridMadrid E-28049Spain Department of Chemistry College of ScienceKing Saud UniversityRiyadh 11451Saudi Arabia Department of Physics and Astronomy University of Nevada Las VegasLas Vegas NV 89154USA

We present a method to fabricate handcrafted thermoelectric devices on standard office paper *** devices are based on thin films of WS_(2),Te,and BP(P-type semiconductors)and TiS_(3)and TiS_(2)(N-type semiconductors),deposited by simply rubbing powder of these materials against *** thermoelectric properties of these semiconducting films revealed maximum Seebeck coefficients of(+1.32±0.27)mV K^(-1)and(-0.82±0.15)mV K^(-1)for WS_(2)and TiS_(3),***,Peltier elements were fabricated by interconnecting the P-and N-type films with graphite electrodes.A thermopower value up to 6.11 mV K^(-1)was obtained when the Peltier element were constructed with three *** findings of this work show proof-of-concept devices to illustrate the potential application of semiconducting van der Waals materials in future thermoelectric power generation as well as temperature sensing for low-cost disposable electronic devices.

关键词： paper-based electronics Seebeck effect semiconductors thermoelectrics van der Waals materials

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Solvent-free fabrication of broadband WS2 photodetectors on paper

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Opto-Electronic Advances 2023年第3期6卷 1-11页

作者： Wenliang Zhang Onur Çakıroğlu Abdullah Al-Enizi Ayman Nafady Xuetao Gan Xiaohua Ma sruthi kuriakose Yong Xie Andres Castellanos-Gomez Materials Science Factory Instituto de Ciencia de Materiales de Madrid(ICMM-CSIC)Madrid E-28049Spain Department of Chemistry College of ScienceKing Saud UniversityRiyadh 11451Saudi Arabia Key Laboratory of Light Field Manipulation and Information Acquisition Ministry of Industry and Information Technologyand Shaanxi Key Laboratory of Optical Information TechnologySchool of Physical Science and TechnologyNorthwestern Polytechnical UniversityXi’an 710129China School of Advanced Materials and Nanotechnology Xidian UniversityXi’an 710071China

Paper-based devices have attracted extensive attention due to the growing demand for disposable flexible ***,we integrate semiconducting devices on cellulose paper substrate through a simple abrasion technique that yields high-performance photodetectors.A solvent-free WS_(2) film deposited on paper favors an effective electron-hole separation and hampers *** as-prepared paper-based WS2 photodetectors exhibit a sensitive photoresponse over a wide spectral range spanning from ultraviolet(365 nm)to near-infrared(940 nm).Their responsivity value reaches up to~270 mA W^(−1) at 35 V under a power density of 35 mW cm^(−2).A high performance photodetector was achieved by controlling the environmental exposure as the ambient oxygen molecules were found to decrease the photoresponse and stability of the WS_(2) ***,we have built a spectrometer using such a paperbased WS_(2) device as the photodetecting component to illustrate its potential *** present work could promote the development of cost-effective disposable photodetection devices.

关键词： paper electronics photodetector van der Waals materials solvent-free deposition tungsten disulfide

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Scalable and low-cost fabrication of flexible WS_(2) photodetectors on polycarbonate

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npj Flexible Electronics 2022年第1期6卷 226-234页

作者： Jorge Quereda sruthi kuriakose Carmen Munuera Federico J.Mompean Abdullah M.Al-Enizi Ayman Nafady Enrique Diez Riccardo Frisenda Andres Castellanos-Gomez GISC Departamento de Física de MaterialesUniversidad Complutense de MadridMadridSpain Materials Science Factory Instituto de Ciencia de Materiales de Madrid(ICMMCSIC)28049 MadridSpain Department of Chemistry College of ScienceKing Saud UniversityRiyadh 11451Saudi Arabia Nanotechnology Group USAL–NanolabUniversidad de Salamanca37008 SalamancaSpain

We present a low-cost and easy-to-implement technique to fabricate large-area WS_(2) photodetector devices onto transparent and flexible polycarbonate *** method relies on the deposition of large-area(in the cm scale)thin films(~30 nm thick)of WS_(2) by a recently introduced abrasion-induced *** electrical contacts are then deposited by thermal evaporation through a shadow *** photodetectors present well-balanced performances with an good trade-off between responsivity(up to 144 mA/W at a source-drain voltage of 10 V and illumination power of 1μW)and response time(down to~70µs)and a detectivity value of 10^(8) *** found that the devices perform very reversibly upon several illumination and straining cycles and we found a moderate device-to-device variation.

关键词： drain illumination cost

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Synthesis and characterization of sodium-lithium niobate ceramic structures and their composites with biopolymers

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Journal of Advanced Ceramics 2013年第1期2卷 11-20页

作者： Thomas V.MATHEW Sunny kuriakose Research and Post Graduate Department of Chemistry St.Thomas CollegePalaArunapuram P.O.KottayamKeralaIndia

Ceramic powders of Na_(1−x)Li_(x)NbO_(3)(LNN)have been synthesized by an aqueous sol-gel *** solid solutions were prepared from Na-Li-Nb precursor *** precursor was synthesized from Na-EDTA,Li-EDTA and Nb-citrate complexes and they acted as the source of Na,Li and Nb,*** acid and ethylenediaminetetraacetic acid(EDTA)were used as the chelating agents for Na,Li and *** precursor gel was calcinated on a muffle furnace at 750℃for one hour and this provided the ceramic *** of LNN-biopolymers were prepared by the encapsulation of the ceramic structures into the biopolymeric *** ceramic structures and composites were characterized by FTIR,NMR,TG and SEM analysis.

关键词： ceramic structures sol-gel chemistry encapsulation thermo gravimetric analysis(TGA)

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Alkali salts of heteropoly tungstates: Efficient catalysts for the synthesis of biodiesel from edible and non-edible oils

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Journal of Energy Chemistry 2015年第1期24卷 87-92页

作者： Rekha Sree Sunny kuriakose Research & Development Center Bharathiar UniversityCoimbatore Tamil Nadu-641046 India Research & Postgraduate Department of Chemistry St. Thomas CollegePala Kerala-686574 India

Alkali salts of tungsten based heteropoly acids with different central atom such as P, Si and Co were prepared and evaluated for transes- terification of both edible and non-edible oils to their corresponding fatty acid methyl esters. The catalyst of sodium salt of tungstic acid with Co as central atom （Na5CoW12O40） showed optimum activity towards transesterification compared with other heteropoly tungstates. The catalysts activities were correlated with the observed physico-chemical characteristics derived from FT-infrared （FT-IR）, X-ray diffraction （XRD）, temperature-programmed desorption of ammonia （NH3-TPD） and carbon dioxide （CO2-TPD）. The Na5CoW12O40 catalyst exhibiting high activity even at 65 ℃ is due to the presence of strong acidic as well as basic sites. The disclosed catalyst is tolerable towards water and free fatty acids present in the oils. The influence of catalyst loading, reaction time and reaction temperature is studied to optimize the reaction parameters.

关键词： transesterification heteropoly tungstates cobalt alkali salts edible oils non-edible oils

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A method for groundwater prospect zonation in data poor areas using remote sensing and GIS:a case study in Kalikavu Panchayath of Malappuram district,Kerala,India

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International Journal of Digital Earth 2009年第2期2卷 155-170页

作者： B.C.Thomas S.L.kuriakose S.K.Jayadev School of Geography University of SouthamptonUK United Nations University-ITC School for Disaster Geo-information Management International Institute for Geo-information Science and Earth Observation(ITC)EnschedeThe Netherlands University Library University of KeralaPalayamThiruvananthapuramKeralaIndia

The present study was an attempt to delineate potential groundwater zones in Kalikavu Panchayat of Malappuram district,Kerala,*** geo-spatial database on geomorphology,landuse,geology,slope and drainage network was generated in a geographic information system(GIS)environment from satellite data,Survey of India topographic sheets and field *** understand the movement and occurrence of groundwater,the geology,geomorphology,structural set-up and recharging conditions have to be well *** the present study,the potential recharge areas are delineated in terms of geology,geomorphology,land use,slope,drainage pattern,*** thematic data generated were integrated using a heuristic method in the GIS domain to generate maps showing potential groundwater *** composite output map scores were reclassified into different zones using a decision *** final output map shows different zones of groundwater prospect,viz.,very good(15.57%of the area),good(43.74%),moderate(28.38%)and poor(12.31%).Geomorphic units such as valley plains,valley fills and alluvial terraces were identified as good to excellent prospect zones,while the gently sloping lateritic uplands were identified as good to moderate *** sloping hilly terrains underlain by hard rocks were identified as poor groundwater prospect zones.

关键词： groundwater Kerala GIS satellite images geomorphic units land use heuristic methods prospect zones the Western Ghats

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Rotula aquatica Lour. inhibits growth and biofilm formation of clinically isolated uropathogenic Escherichia coli

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Asian Pacific Journal of Tropical Biomedicine 2020年第12期10卷 547-554页

作者： A.Vysakh Sebastian Jose Midhun Ninan Jisha kuriakose Jayesh V.Vijeesh Mathew Jyothis MS Latha School of Biosciences Mahatma Gandhi UniversityPriyadarshini HillsKottayamKeralaIndia

Objective:To evaluate the anti-bacterial and anti-biofilm activity of ethyl acetate fraction of Rotula aquatica Lour.(EFRA)against clinically isolated uropathogenic Escherichia ***:In vitro antibacterial and anti-biofilm studies were *** antimicrobial activity of EFRA was assayed by the well diffusion *** minimum inhibitory concentration(MIC)and minimum bactericidal concentration(MBC)of the active fraction were determined by Resazurin *** time-kill kinetic assay,acridine orange-ethidium bromide staining,propidium iodide uptake assay,and scanning electron microscopic(SEM)analysis were done to evaluate the efficacy of EFRA in killing uropathogenic Escherichia *** anti-biofilm activity was determined by 3-[4,5-dimethyl-2-thiazolyl]-2,5-diphenyl-2 H-tetrazolium-bromide(MTT)assay and specific biofilm formation ***:The well diffusion assay of EFRA showed a very clear zone of inhibition against Escherichia coli *** MIC and MBC of EFRA were 2.5 mg/m L and 5 mg/m L,*** time-kill kinetic assay,fluorescence microscopic analysis,propidium iodide uptake assay,and SEM analysis displayed the effect of EFRA in killing the *** MTT assay and specific biofilm formation assay showed that EFRA prevented the formation of ***:The results of the present study confirm that EFRA could prevent bacterial growth and inhibit its biofilm formation.

关键词： Rotula aquatica Escherichia coli Urinary tract infections Anti-bacterial activity

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Krukenberg tumour as the initial presentation of Peutz-Jeghers syndrome

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Gastroenterology Report 2014年第1期2卷 73-76页

作者： Bhavith Remalayam Santhosh kuriakose Prathapan Valiya Kambarath Ramachandran Thazhath Mavali Department of Gastroenterology Government Medical CollegeKozhikodeKeralaIndia Department of Obstetrics and Gynaecology Government Medical CollegeKozhikodeKeralaIndia Department of Surgical Gastroenterology Government Medical CollegeKozhikodeKeralaIndia

Peutz-Jeghers syndrome(PJS)is an hereditary syndrome characterized by gastrointestinal polyposis and mucocutaneous *** patients are at increased risk of developing various cancers,especially of the gastrointestinal and gynaecological *** adenocarcinoma is one of the more common tumours that occur in *** report a young lady presenting with a large ovarian tumour,later diagnosed to have PJS with colonic signet cell adenocarcinoma and synchronous ovarian metastasis.

关键词： Krukenberg tumour Peutz-Jeghers syndrome signet cell adenocarcinoma

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Synthesis, Characterization and Photoinduced Cis-Trans Isomerisation Studies on Lignin Modified with 4-[(E)-2-(3-hydroxynaphthalen-2-yl)diazen-1-yl] Benzoic Acid

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Open Journal of Organic Polymer Materials 2012年第4期2卷 69-74页

作者： Ambily Chandran Sunny kuriakose Tessymol Mathew Research and Post Graduate Department of Chemistry St.George College Mahathma Gandhi University Kerala India. Research and Post Graduate Department of Chemistry St.Thomas College Mahathma Gandhi University Kerala India

In the present study, a photoresponsive chromophoric system such as 4-[(E)-2-(3-hydro xynaphthalen-2-yl)diazen-1-yl] benzoic acid was incorporated on to lignin core by functional transformation reactions and the photoresponsive beha-vior of the green, environment friendly product was investigated. The end hydroxyl group of lignin was modified with the chromophoric systems by DCC coupling. The chromophoric systems as well as the chromophore-bound biopolymer core systems were purified by column chromatography. The products were characterized by UV-visible, fluorescence, FT-IR and NMR spectroscopic methods. The results of the studies show that incorporation of the chromophoric system on to the lignin core enhanced the light absorption, emission and light stabilization properties of the chromophoric system. The light fastening properties of chromophoric system and the modified product were compared. It shows that stability of the chromophoric system greatly enhanced on attaching to the polymeric system. The trans-cis photoisomerisation and the reverse cis-trans thermal conversions were also assisted by the lignin core. The remarkable stability on irradiation shows that this is a novel photoresponsive system with excellent light fastening properties which would find application in coating materials, dyes, paints, inks, therapeutic agents and many more.

关键词： Lignin Photoresponsive Environment Friendly Light Fastening Cis-Trans Isomerisation

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Synthesis, Characterisation and Photoresponsive Studies of Lignin Functionalised with 2-(5-(4-dimethylamino-benzylidin)-4-oxo-2-thioxo- thiazolidin-3-yl)-acetic Acid

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Open Journal of Organic Polymer Materials 2012年第4期2卷 63-68页

作者： Ambily Chandran Sunny kuriakose Tessymol Mathew Research and Post Graduate Department of Chemistry St.George College Mahathma Gandhi University Kerala India Research and Post Graduate Department of Chemistry St.Thomas College Mahathma Gandhi University Kerala India

A chromophoric system 2-(5-(4-dimethylamino-benzylidin)-4-oxo-2-thioxo-thiazoli din-3-yl)acetic acid with push-pull electron modulation was synthesised and incorporated onto lignin core (technical lignin, lignin sulphonic acid M.W. 52,400) and the photo responsive behaviour was investigated. The product was characterised by UV-visible, fluores-cence, FT-IR, and NMR spectroscopic methods. The results of the studies show that the incorporation of the chromo-phoric system on to the lignin core enhanced the light absorption and light stabilization properties of the chromophoric system. The remarkable stability on irradiation provides a novel photo responsive system with excellent light fastening properties which would find application in coating materials, dyes, paints etc.

关键词： Lignin Photoresponsive Environment Friendly Light Fastening Coating Material

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