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Roy PK, Antonatos N, Li T, Jing Y, Luxa J, Azadmanjiri J, Marvan P, Heine T, Sofer Z. 2D Few-Layered PdPS: Toward High-Efficient Self-Powered Broadband Photodetector and Sensors. ACS Appl Mater Interfaces 2023; 15:1859-1870. [PMID: 36541490 DOI: 10.1021/acsami.2c18125] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Photodetectors and sensors have a prominent role in our lives and cover a wide range of applications, including intelligent systems and the detection of harmful and toxic elements. Although there have been several studies in this direction, their practical applications have been hindered by slow response and low responsiveness. To overcome these problems, we have presented here a self-powered (photoelectrochemical, PEC), ultrasensitive, and ultrafast photodetector platform. For this purpose, a novel few-layered palladium-phosphorus-sulfur (PdPS) was fabricated by shear exfoliation for effective photodetection as a practical assessment. The characterization of this self-powered broadband photodetector demonstrated superior responsivity and specific detectivity in the order of 33 mA W-1 and 9.87 × 1010 cm Hz1/2 W-1, respectively. The PEC photodetector also exhibits a broadband photodetection capability ranging from UV to IR spectrum, with the ultrafast response (∼40 ms) and recovery time (∼50 ms). In addition, the novel few-layered PdPS showed superior sensing ability to organic vapors with ultrafast response and a recovery time of less than 1 s. Finally, the photocatalytic activity in the form of hydrogen evolution reaction was explored due to the suitable band alignment and pronounced light absorption capability. The self-powered sensing platforms and superior catalytic activity will pave the way for practical applications in efficient future devices.
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Affiliation(s)
- Pradip Kumar Roy
- Department of Inorganic Chemistry, University of Chemistry and Technology Prague, Technická 5, 166 28Prague 6, Czech Republic
| | - Nikolas Antonatos
- Department of Inorganic Chemistry, University of Chemistry and Technology Prague, Technická 5, 166 28Prague 6, Czech Republic
| | - Tianchun Li
- Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, College of Chemical Engineering, Nanjing Forestry University, 210037Nanjing, China
| | - Yu Jing
- Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, College of Chemical Engineering, Nanjing Forestry University, 210037Nanjing, China
| | - Jan Luxa
- Department of Inorganic Chemistry, University of Chemistry and Technology Prague, Technická 5, 166 28Prague 6, Czech Republic
| | - Jalal Azadmanjiri
- Department of Inorganic Chemistry, University of Chemistry and Technology Prague, Technická 5, 166 28Prague 6, Czech Republic
| | - Petr Marvan
- Department of Inorganic Chemistry, University of Chemistry and Technology Prague, Technická 5, 166 28Prague 6, Czech Republic
| | - Thomas Heine
- Fakultät Chemie und Lebensmittelchemie, TU Dresden, Bergstraße 66c, 01062Dresden, Germany
- Helmholtz-Zentrum Dresden-Rossendorf, Forschungsstelle Leipzig, Permoserstraßem 15, 04318Leipzig, Germany
| | - Zdeněk Sofer
- Department of Inorganic Chemistry, University of Chemistry and Technology Prague, Technická 5, 166 28Prague 6, Czech Republic
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2
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Pal B, Matsoso JB, Parameswaran AK, Roy PK, Lukas D, Luxa J, Marvan P, Azadmanjiri J, Hrdlicka Z, Jose R, Sofer Z. Flexible, ultralight, and high-energy density electrochemical capacitors using sustainable materials. Electrochim Acta 2022. [DOI: 10.1016/j.electacta.2022.140239] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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3
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Malinsky P, Novák J, Štěpanovská E, Slepička P, Švorčík V, Szőkölová K, Marvan P, Sofer Z, Mackova A. The multi-energetic Au ion implantation of graphene oxide and polymers. EPJ Web Conf 2022. [DOI: 10.1051/epjconf/202226102006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The electric properties of polymers are increasingly important in a wide range of applications such as sensors, energy storages, microelectronics, and filtration membranes among others. In this work, the effect of multi-energetic Au ion implantation on the graphene oxide (GO), polyimide (PI), polyethylene terephthalate (PET) and polylactide (PLLA) elemental, chemical, structural end electric properties is presented with potential application in 3D metal-dielectric structure synthetization. The three energies, 3.2, 1.6, 0.8 MeV of Au ions with fluence 3.75×1014 cm-2 were used in ascending or descending order to create two sample sets, which were subsequently analysed by RBS, ERDA, EDS and AFM. RBS analysis was used for Au-depth profile characterization in the implanted samples, the profiles agree reasonably with those simulated by SRIM code. Electrical properties were investigated by standard two-point technique with respect to the used parameters of the ion irradiation. The sheet resistance decreases after ion irradiation and it is evident that the ascending order of ion implantation energies has more significant effect on the conductivity enhancement compare to the descending one.
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Wu B, Hou G, Kovalska E, Mazanek V, Marvan P, Liao L, Dekanovsky L, Sedmidubsky D, Marek I, Hervoches C, Sofer Z. High-Entropy NASICON Phosphates (Na 3M 2(PO 4) 3 and NaMPO 4O x, M = Ti, V, Mn, Cr, and Zr) for Sodium Electrochemistry. Inorg Chem 2022; 61:4092-4101. [PMID: 35191302 DOI: 10.1021/acs.inorgchem.1c03861] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
High-entropy materials, with complex compositions and unique cocktail characteristics, have recently drawn significant attention. Additionally, a family of sodium super ion conductors (NASICONs)-structured phosphates in energy storage areas shows a comprehensive application for traditional alkaline ion batteries and, in particular, solid-state electrolytes. However, there is no precedent in fabricating this kind of NASICON-type high-entropy phase. Here, we report the successful fabrication of two well-crystallized high-entropy phosphates, namely, Na3(Ti0.2V0.2Mn0.2Cr0.2Zr0.2)2(PO4)3 (HE-N3M2P3) and Na(Ti0.2V0.2Mn0.2Cr0.2Zr0.2)2PO4Ox (HE-NMP). The prepared materials in which the transition metals (TMs) of Ti, V, Mn, Cr, and Zr occupy the same 12c Wykoff position can form a structure analogous to R3̅c Na3V2(PO4)3 that is carefully determined by X-ray diffraction, neutron diffraction, and transmission electron microscopy. Further, their performance for sodium ion batteries and sodium-based solid-state electrolytes was evaluated. The HE-N3M2P3 might exhibit a promising electrochemical performance for sodium storage in terms of its structure resembling that of Na3V2(PO4)3. Meanwhile, the HE-NMP shows considerable electrochemical activity with numerous broad redox ranges during extraction and insertion of Na+, related to the coexistence of several TM elements. The evaluated temperature-dependent ionic conductivity for HE-NMP solid electrolyte varies from 10-6 to 10-5 S cm-1 from room temperature to 398.15 K, offering high potential for energy storage applications as a new high-entropy system.
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Affiliation(s)
- Bing Wu
- Department of Inorganic Chemistry, University of Chemistry and Technology Prague, Technická 5, 166 28 Prague 6, Czech Republic
| | - Guorong Hou
- Department of Inorganic Chemistry, University of Chemistry and Technology Prague, Technická 5, 166 28 Prague 6, Czech Republic
| | - Evgeniya Kovalska
- Department of Inorganic Chemistry, University of Chemistry and Technology Prague, Technická 5, 166 28 Prague 6, Czech Republic
| | - Vlastimil Mazanek
- Department of Inorganic Chemistry, University of Chemistry and Technology Prague, Technická 5, 166 28 Prague 6, Czech Republic
| | - Petr Marvan
- Department of Inorganic Chemistry, University of Chemistry and Technology Prague, Technická 5, 166 28 Prague 6, Czech Republic
| | - Liping Liao
- Department of Inorganic Chemistry, University of Chemistry and Technology Prague, Technická 5, 166 28 Prague 6, Czech Republic
| | - Lukas Dekanovsky
- Department of Inorganic Chemistry, University of Chemistry and Technology Prague, Technická 5, 166 28 Prague 6, Czech Republic
| | - David Sedmidubsky
- Department of Inorganic Chemistry, University of Chemistry and Technology Prague, Technická 5, 166 28 Prague 6, Czech Republic
| | - Ivo Marek
- Central Laboratories, University of Chemistry and Technology Prague, Technická 5, 166 28 Prague 6, Czech Republic
| | - Charles Hervoches
- Nuclear Physics Institute, Czech Academy of Sciences, 250 68 Řež, Czech Republic
| | - Zdenek Sofer
- Department of Inorganic Chemistry, University of Chemistry and Technology Prague, Technická 5, 166 28 Prague 6, Czech Republic
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5
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Roy PK, Marvan P, Mazánek V, Antonatos N, Bouša D, Kovalska E, Sedmidubský D, Sofer Z. Self-Powered Broadband Photodetector and Sensor Based on Novel Few-Layered Pd 3(PS 4) 2 Nanosheets. ACS Appl Mater Interfaces 2021; 13:30806-30817. [PMID: 34161061 DOI: 10.1021/acsami.1c05974] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Optoelectronics and sensing devices are of enormous importance in our modern lives, which has propelled the scientific community to explore new two-dimensional (2D) nanomaterials to meet the requirements of future devices. Herein, we present the exfoliation of palladium thiophosphate (Pd3(PS4)2) by mechanical shear force exfoliation. The Pd3(PS4)2-based photoelectrochemical (PEC) device demonstrated self-powered broadband photodetection in the range of 385-940 nm with an unprecedented responsivity of 2 A W-1 and a specific detectivity of about 8.67 × 1011 cm Hz1/2 W-1 under the illumination of 420 nm LED light. The crucial parameters such as photoresponsivity, response, and recovery time of the device can be controlled by an externally applied voltage and the analyte concentration. Moreover, Pd3(PS4)2-based vapor-sensing devices exhibited frequency-dependent selective acetone sensing in the presence of other organic vapors with an ultrafast response and a recovery time of less than 1 s. Finally, the photocatalytic activity of Pd3(PS4)2 was revealed, which can be attributed to the presence of an appropriate band alignment with the catalytic activity of Pd. This novel material with the aforementioned fascinating phenomenon will pave the way toward practical future applications in optoelectronics and sensing.
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Affiliation(s)
- Pradip Kumar Roy
- Department of Inorganic Chemistry, University of Chemistry and Technology Prague, Technická 5, 166 28 Prague 6, Czech Republic
| | - Petr Marvan
- Department of Inorganic Chemistry, University of Chemistry and Technology Prague, Technická 5, 166 28 Prague 6, Czech Republic
| | - Vlastimil Mazánek
- Department of Inorganic Chemistry, University of Chemistry and Technology Prague, Technická 5, 166 28 Prague 6, Czech Republic
| | - Nikolas Antonatos
- Department of Inorganic Chemistry, University of Chemistry and Technology Prague, Technická 5, 166 28 Prague 6, Czech Republic
| | - Daniel Bouša
- Department of Inorganic Chemistry, University of Chemistry and Technology Prague, Technická 5, 166 28 Prague 6, Czech Republic
| | - Evgeniya Kovalska
- Department of Inorganic Chemistry, University of Chemistry and Technology Prague, Technická 5, 166 28 Prague 6, Czech Republic
| | - David Sedmidubský
- Department of Inorganic Chemistry, University of Chemistry and Technology Prague, Technická 5, 166 28 Prague 6, Czech Republic
| | - Zdeněk Sofer
- Department of Inorganic Chemistry, University of Chemistry and Technology Prague, Technická 5, 166 28 Prague 6, Czech Republic
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6
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Zappia M, Bianca G, Bellani S, Curreli N, Sofer Z, Serri M, Najafi L, Piccinni M, Oropesa-Nuñez R, Marvan P, Pellegrini V, Kriegel I, Prato M, Cupolillo A, Bonaccorso F. Two-Dimensional Gallium Sulfide Nanoflakes for UV-Selective Photoelectrochemical-type Photodetectors. J Phys Chem C Nanomater Interfaces 2021; 125:11857-11866. [PMID: 34276861 PMCID: PMC8279705 DOI: 10.1021/acs.jpcc.1c03597] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/21/2021] [Revised: 04/28/2021] [Indexed: 06/13/2023]
Abstract
Two-dimensional (2D) transition-metal monochalcogenides have been recently predicted to be potential photo(electro)catalysts for water splitting and photoelectrochemical (PEC) reactions. Differently from the most established InSe, GaSe, GeSe, and many other monochalcogenides, bulk GaS has a large band gap of ∼2.5 eV, which increases up to more than 3.0 eV with decreasing its thickness due to quantum confinement effects. Therefore, 2D GaS fills the void between 2D small-band-gap semiconductors and insulators, resulting of interest for the realization of van der Waals type-I heterojunctions in photocatalysis, as well as the development of UV light-emitting diodes, quantum wells, and other optoelectronic devices. Based on theoretical calculations of the electronic structure of GaS as a function of layer number reported in the literature, we experimentally demonstrate, for the first time, the PEC properties of liquid-phase exfoliated GaS nanoflakes. Our results indicate that solution-processed 2D GaS-based PEC-type photodetectors outperform the corresponding solid-state photodetectors. In fact, the 2D morphology of the GaS flakes intrinsically minimizes the distance between the photogenerated charges and the surface area at which the redox reactions occur, limiting electron-hole recombination losses. The latter are instead deleterious for standard solid-state configurations. Consequently, PEC-type 2D GaS photodetectors display a relevant UV-selective photoresponse. In particular, they attain responsivities of 1.8 mA W-1 in 1 M H2SO4 [at 0.8 V vs reversible hydrogen electrode (RHE)], 4.6 mA W-1 in 1 M Na2SO4 (at 0.9 V vs RHE), and 6.8 mA W-1 in 1 M KOH (at 1.1. V vs RHE) under 275 nm illumination wavelength with an intensity of 1.3 mW cm-2. Beyond the photodetector application, 2D GaS-based PEC-type devices may find application in tandem solar PEC cells in combination with other visible-sensitive low-band-gap materials, including transition-metal monochalcogenides recently established for PEC solar energy conversion applications.
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Affiliation(s)
- Marilena
I. Zappia
- BeDimensional
Spa., via Lungotorrente
Secca 3D, 16163 Genova, Italy
- Department
of Physics, University of Calabria, Via P. Bucci cubo 31/C, 87036 Rende, CS, Italy
| | - Gabriele Bianca
- Graphene
Labs, Istituto Italiano di Tecnologia, via Morego 30, 16163 Genova, Italy
- Dipartimento
di Chimica e Chimica Industriale, Università
degli Studi di Genova, via Dodecaneso 31, 16146 Genoa, Italy
| | - Sebastiano Bellani
- BeDimensional
Spa., via Lungotorrente
Secca 3D, 16163 Genova, Italy
- Graphene
Labs, Istituto Italiano di Tecnologia, via Morego 30, 16163 Genova, Italy
| | - Nicola Curreli
- Functional
Nanosystems, Istituto Italiano di Tecnologia (IIT), via Morego 30, 16163 Genova, Italy
| | - Zdeněk Sofer
- Department
of Inorganic Chemistry, University of Chemistry
and Technology Prague, Technická 5, 166 28 Prague 6, Czech Republic
| | - Michele Serri
- Graphene
Labs, Istituto Italiano di Tecnologia, via Morego 30, 16163 Genova, Italy
| | - Leyla Najafi
- BeDimensional
Spa., via Lungotorrente
Secca 3D, 16163 Genova, Italy
- Graphene
Labs, Istituto Italiano di Tecnologia, via Morego 30, 16163 Genova, Italy
| | - Marco Piccinni
- Graphene
Labs, Istituto Italiano di Tecnologia, via Morego 30, 16163 Genova, Italy
- Dipartimento
di Chimica e Chimica Industriale, Università
degli Studi di Genova, via Dodecaneso 31, 16146 Genoa, Italy
| | - Reinier Oropesa-Nuñez
- BeDimensional
Spa., via Lungotorrente
Secca 3D, 16163 Genova, Italy
- Department
of Material Science and Engineering, Uppsala
University, Box 534, 75121 Uppsala, Sweden
| | - Petr Marvan
- Department
of Inorganic Chemistry, University of Chemistry
and Technology Prague, Technická 5, 166 28 Prague 6, Czech Republic
| | - Vittorio Pellegrini
- BeDimensional
Spa., via Lungotorrente
Secca 3D, 16163 Genova, Italy
- Graphene
Labs, Istituto Italiano di Tecnologia, via Morego 30, 16163 Genova, Italy
| | - Ilka Kriegel
- Functional
Nanosystems, Istituto Italiano di Tecnologia (IIT), via Morego 30, 16163 Genova, Italy
| | - Mirko Prato
- Materials
Characterization Facility, Istituto Italiano di Tecnologia, via Morego 30, Genova 16163, Italy
| | - Anna Cupolillo
- Department
of Physics, University of Calabria, Via P. Bucci cubo 31/C, 87036 Rende, CS, Italy
| | - Francesco Bonaccorso
- BeDimensional
Spa., via Lungotorrente
Secca 3D, 16163 Genova, Italy
- Graphene
Labs, Istituto Italiano di Tecnologia, via Morego 30, 16163 Genova, Italy
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Bouša D, Marvan P, Kosina J, Sturala J, Sofer Z. Picric acid violet light assisted photodegradation mediated by germanene-based materials. BCSJ 2021. [DOI: 10.1246/bcsj.20210056] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Daniel Bouša
- Department of Inorganic Chemistry, University of Chemistry and Technology Prague, 166 28 Prague, Czech Republic
| | - Petr Marvan
- Department of Inorganic Chemistry, University of Chemistry and Technology Prague, 166 28 Prague, Czech Republic
| | - Jiří Kosina
- Central laboratories, University of Chemistry and Technology Prague, 166 28 Prague, Czech Republic
| | - Jiri Sturala
- Department of Inorganic Chemistry, University of Chemistry and Technology Prague, 166 28 Prague, Czech Republic
| | - Zdeněk Sofer
- Department of Inorganic Chemistry, University of Chemistry and Technology Prague, 166 28 Prague, Czech Republic
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8
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Kovalska E, Luxa J, Melle-Franco M, Wu B, Marek I, Roy PK, Marvan P, Sofer Z. Single-Step Synthesis of Platinoid-Decorated Phosphorene: Perspectives for Catalysis, Gas Sensing, and Energy Storage. ACS Appl Mater Interfaces 2020; 12:50516-50526. [PMID: 33108159 DOI: 10.1021/acsami.0c15525] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The originality of phosphorene is suppressed by its structural defects, irreproducibility, and sensitivity to the ambient environment. To preserve phosphorene's essential characteristics, for example, influencing the charge redistribution and generating the formation of active centers, noble-metal decoration is found to be an efficient approach. Herein, we demonstrate a single-step electrochemical synthesis of platinoid-decorated few-layer phosphorene (FP). The material's structure and effects of metal (Ru, Rh, and Pd) deposition on the FP nanosheets were first explored by numerous analytical techniques and theoretical calculations. Platinoid-decorated FPs demonstrate high quality and consist of one to five layers modified with round- and heptagon-shaped metal nanoparticles with the most intense distribution of Pd. The high-rate Rh deposition provides the enhanced electrocatalytic efficiency for hydrogen evolution (79 mV·dec-1-Tafel slope) and almost 20 times increased capacity for the Li-ion batteries in comparison to bare and Ru-decorated FP. The chemosensing of platinoid-decorated FP indicates a response to methanol plus ethanol and shows inertness to acetone. The incorporation of Ru and Rh nanoparticles increases FP's selectivity toward methanol. This research provides a new approach for the in situ FP functionalization during top-down synthesis and thus broadens the material's feasibility for advanced nanotechnology.
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Affiliation(s)
- Evgeniya Kovalska
- Department of Inorganic Chemistry, University of Chemistry and Technology Prague, Technická 5, 166 28 Prague 6, Czech Republic
| | - Jan Luxa
- Department of Inorganic Chemistry, University of Chemistry and Technology Prague, Technická 5, 166 28 Prague 6, Czech Republic
| | - Manuel Melle-Franco
- CICECO-Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Bing Wu
- Department of Inorganic Chemistry, University of Chemistry and Technology Prague, Technická 5, 166 28 Prague 6, Czech Republic
| | - Ivo Marek
- Central Laboratories, University of Chemistry and Technology Prague, 166 28 Prague 6, Czech Republic
| | - Pradip Kumar Roy
- Department of Inorganic Chemistry, University of Chemistry and Technology Prague, Technická 5, 166 28 Prague 6, Czech Republic
| | - Petr Marvan
- Department of Inorganic Chemistry, University of Chemistry and Technology Prague, Technická 5, 166 28 Prague 6, Czech Republic
| | - Zdenek Sofer
- Department of Inorganic Chemistry, University of Chemistry and Technology Prague, Technická 5, 166 28 Prague 6, Czech Republic
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9
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Veselý M, Marvan P, Trejbal J, Mazánek V, Luxa J, Šturala J, Sofer Z. Autogenous Formation of Gold on Layered Black Phosphorus for Catalytic Purification of Waste Water. ACS Appl Mater Interfaces 2020; 12:22702-22709. [PMID: 32330010 DOI: 10.1021/acsami.9b20618] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Layered black phosphorus (BP) is a member of a layered material family with anisotropic properties and layer-dependent band gaps that can be exfoliated down to single-layered phosphorene. Compared with graphene, few-layered BP and its single-layer phosphorene are significantly more reactive, and this reactivity can be applied for the autogenous reduction of gold ions to metallic gold nanoparticles supported by few-layered BP (Au/BP). Few-layered BP and gold are well-known oxidation catalysts important in organic synthesis and also in the catalytic treatment and purification of industrial wastewater. The treatment of organic contamination present in industrial wastewater presents serious problems and is an important issue for current catalysis. Here, we show the high catalytic activity of the gold supported on few-layered black phosphorus (Au/BP) for wet oxidation of acrylic acid, including samples of industrial wastewater with complex composition. The catalyst Au/BP exhibits high stability, which allows utilization of its easily accessible 2D surface for the preparation of 2D material-supported metal catalysts.
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Affiliation(s)
- Martin Veselý
- Department of Organic Technology, University of Chemistry and Technology Prague, Technická 5, 166 28 Prague, Czech Republic
| | - Petr Marvan
- Department of Inorganic Chemistry, University of Chemistry and Technology Prague, Technická 5, 166 28 Prague, Czech Republic
| | - Jiří Trejbal
- Department of Organic Technology, University of Chemistry and Technology Prague, Technická 5, 166 28 Prague, Czech Republic
| | - Vlastimil Mazánek
- Department of Inorganic Chemistry, University of Chemistry and Technology Prague, Technická 5, 166 28 Prague, Czech Republic
| | - Jan Luxa
- Department of Inorganic Chemistry, University of Chemistry and Technology Prague, Technická 5, 166 28 Prague, Czech Republic
| | - Jiří Šturala
- Department of Inorganic Chemistry, University of Chemistry and Technology Prague, Technická 5, 166 28 Prague, Czech Republic
| | - Zdeněk Sofer
- Department of Inorganic Chemistry, University of Chemistry and Technology Prague, Technická 5, 166 28 Prague, Czech Republic
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10
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Najafi L, Bellani S, Oropesa-Nuñez R, Martín-García B, Prato M, Pasquale L, Panda JK, Marvan P, Sofer Z, Bonaccorso F. TaS 2, TaSe 2, and Their Heterogeneous Films as Catalysts for the Hydrogen Evolution Reaction. ACS Catal 2020; 10:3313-3325. [PMID: 33815892 PMCID: PMC8016161 DOI: 10.1021/acscatal.9b03184] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [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] [Received: 07/28/2019] [Revised: 02/10/2020] [Indexed: 12/16/2022]
Abstract
![]()
Metallic
two-dimensional transition-metal dichalcogenides (TMDs)
of the group 5 metals are emerging as catalysts for an efficient
hydrogen evolution reaction (HER). The HER activity of the group 5
TMDs originates from the unsaturated chalcogen edges and the highly
active surface basal planes, whereas the HER activity of the widely
studied group 6 TMDs originates solely from the chalcogen- or metal-unsaturated
edges. However, the batch production of such nanomaterials and their
scalable processing into high-performance electrocatalysts is still
challenging. Herein, we report the liquid-phase exfoliation of the
2H-TaS2 crystals by using 2-propanol to produce single/few-layer
(1H/2H) flakes, which are afterward deposited as catalytic films.
A thermal treatment-aided texturization of the catalytic films is
used to increase their porosity, promoting the ion access to the basal
planes of the flakes, as well as the number of catalytic edges of
the flakes. The hybridization of the H-TaS2 flakes and
H-TaSe2 flakes tunes the Gibbs free energy of the adsorbed
atomic hydrogen onto the H-TaS2 basal planes to the optimal
thermo-neutral value. In 0.5 M H2SO4, the heterogeneous
catalysts exhibit a low overpotential (versus RHE, reversible hydrogen
electrode) at the cathodic current of 10 mA cm–2 (η10) of 120 mV and high mass activity of 314 A
g–1 at an overpotential of 200 mV. In 1 M KOH, they
show a η10 of 230 mV and a mass activity of 220 A
g–1 at an overpotential of 300 mV. Our results provide
new insight into the usage of the metallic group 5 TMDs for the HER
through scalable material preparation and electrode processing.
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Affiliation(s)
- Leyla Najafi
- Graphene Labs, Istituto Italiano di Tecnologia, via Morego 30, 16163 Genova, Italy
| | - Sebastiano Bellani
- Graphene Labs, Istituto Italiano di Tecnologia, via Morego 30, 16163 Genova, Italy
| | | | | | - Mirko Prato
- Materials Characterization Facility, Istituto Italiano di Tecnologia, via Morego 30, 16163 Genova, Italy
| | - Lea Pasquale
- Materials Characterization Facility, Istituto Italiano di Tecnologia, via Morego 30, 16163 Genova, Italy
| | - Jaya-Kumar Panda
- Graphene Labs, Istituto Italiano di Tecnologia, via Morego 30, 16163 Genova, Italy
| | - Petr Marvan
- Department of Inorganic Chemistry, University of Chemistry and Technology Prague, Technická 5, 166 28 Prague 6, Czech Republic
| | - Zdeněk Sofer
- Department of Inorganic Chemistry, University of Chemistry and Technology Prague, Technická 5, 166 28 Prague 6, Czech Republic
| | - Francesco Bonaccorso
- Graphene Labs, Istituto Italiano di Tecnologia, via Morego 30, 16163 Genova, Italy
- BeDimensional Spa, via Albisola 121, 16163 Genova, Italy
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11
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Luxa J, Marvan P, Lazar P, Sofer Z. Chalcogenide vacancies drive the electrocatalytic performance of rhenium dichalcogenides. Nanoscale 2019; 11:14684-14690. [PMID: 31343029 DOI: 10.1039/c9nr03281a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The hydrogen evolution reaction (HER) is one of the most promising ways to produce clean energy. However, its wide-spread use is hindered by the price of the state-of-the-art catalysts based on precious metals. Transition metal dichalcogenide (TMD) nanomaterials are a cheap alternative, but a relatively large portion of them remains unexplored in terms of the HER. Here we report the HER performance of rhenium disulfide and diselenide in an acidic environment. We used sodium naphthalenide as an exfoliation agent. In comparison with other TMDs, the degree of exfoliation was relatively low. On the other hand, rhenium disulfide and diselenide both exhibit high chemical stability towards oxidation even after the exfoliation. The reported HER performance of the exfoliated rhenium dichalcogenides was strongly dependent on electrochemical treatment and to further enhance the performance, we used a series of electrochemical pretreatments at potentials as high as -2 V in sulfuric acid. While the morphology of the samples remained unchanged, the surface was found out to be chalcogen deficient, pointing out the formation of chalcogen vacancies. Consequentially, the HER performance was substantially enhanced. These results were corroborated by theoretical calculations showing improved bonding of hydrogen by chalcogenide vacancies at the surface. Our results show that a very simple electrochemical procedure can be used to improve the electrocatalytic performance of rhenium dichalcogenides and, possibly, also other TMDs.
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Affiliation(s)
- Jan Luxa
- Department of Inorganic Chemistry, University of Chemistry and Technology Prague, Technická 5, 166 28 Prague 6, Czech Republic.
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Gusmão R, Sofer Z, Marvan P, Pumera M. MoS 2 versatile spray-coating of 3D electrodes for the hydrogen evolution reaction. Nanoscale 2019; 11:9888-9895. [PMID: 31086894 DOI: 10.1039/c9nr01876j] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
A facile one-step MoS2 spray-coating method was applied to a range of rigid, flexible, porous and 3D printed carbon-based surfaces, yielding high loadings in MoS2 flakes. The characterization of MoS2 flakes from a commercial lubricant spray reveals up to micron-scale bulk sheets of the layered material, constituted in its majority by the semiconducting 2H polymorph, in the presence of the metallic 1T phase. Consequently, the process generates MoS2 spray-coated surfaces with improved hydrogen evolution reaction (HER) catalytic performance. In the case of carbon-based screen printed electrodes (SPE), a short-term thermal post-treatment of the MoS2 spray-coated SPE had a further beneficial effect in the HER overpotential. The MoS2 spray-coated 3D metallic meshes held the lowest HER overpotential of the series. Finally, MoS2 spray-coated 3D printed electrodes yielded improved heterogeneous charge transfer and a 500 mV shift in the required overpotential at a current density of -10 mA cm-2. The MoS2 spray-coated 3D printed electrode displayed an abundant coverage at the inner, external and planar zones of electrodes by the MoS2 sheets, even after long-term operation conditions. These outcomes can be beneficial for future tailoring of MoS2 spray-coated surfaces and their implementation in energy conversion technologies.
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Affiliation(s)
- Rui Gusmão
- Center for the Advanced Functional Nanorobots, Department of Inorganic Chemistry, University of Chemistry and Technology Prague, Technicka 5, 166 28 Prague 6, Czech Republic
| | - Zdeněk Sofer
- Center for the Advanced Functional Nanorobots, Department of Inorganic Chemistry, University of Chemistry and Technology Prague, Technicka 5, 166 28 Prague 6, Czech Republic
| | - Petr Marvan
- Center for the Advanced Functional Nanorobots, Department of Inorganic Chemistry, University of Chemistry and Technology Prague, Technicka 5, 166 28 Prague 6, Czech Republic
| | - Martin Pumera
- Center for the Advanced Functional Nanorobots, Department of Inorganic Chemistry, University of Chemistry and Technology Prague, Technicka 5, 166 28 Prague 6, Czech Republic and Department of Chemical and Biomolecular Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul 03722, Korea and Future Energy and Innovation Laboratory, Central European Institute of Technology, Brno University of Technology, Purkyňova 656/123, Brno, CZ-616 00, Czech Republic.
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Marvan P, Mazánek V, Sofer Z. Shear-force exfoliation of indium and gallium chalcogenides for selective gas sensing applications. Nanoscale 2019; 11:4310-4317. [PMID: 30788468 DOI: 10.1039/c8nr09294j] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Layered chalcogenides AIIIBVI of gallium and indium form a group of semiconducting nanomaterials with huge potential in electronic, sensor and energy storage applications. However, the preparation method predetermines the usage of the prepared nanomaterial. In this paper, we investigated shear-force milling exfoliation in a surfactant free water/ethanol mixture on indium and gallium chalcogenides and their utilization in the gas sensing of volatile organic compounds (VOCs). The exfoliation of bulk materials in a surfactant-free environment helped to avoid any surface contamination and allowed the preparation of materials without non-covalently bonded large organic molecules. Furthermore, the gas-sensing properties were evaluated by electrical impedance spectroscopy on VOCs. Our results showed high sensitivity and selectivity towards methanol. This suggests that shear-force milling is an effective method for the exfoliation of indium and gallium chalcogenides which can find application in the selective gas sensing of VOCs.
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Affiliation(s)
- Petr Marvan
- Department of Inorganic Chemistry, University of Chemistry and Technology Prague, Technická 5, 166 28 Prague 6, Czech Republic.
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Nischler C, Emesz M, Hufnagl C, Marvan P, Hornykewycz K, Stöllinger M, Grabner G, Hitzl W. Fahrgewohnheiten von Patienten mit Glaukom. Klin Monbl Augenheilkd 2005; 222:1002-7. [PMID: 16380886 DOI: 10.1055/s-2005-858588] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
BACKGROUND Central visual field defects due to glaucoma are common, increasing with old age. Impaired visual processing, for instance caused by glaucoma, may play a role in the aetiology of car accidents involving older drivers which can result in personal injury. Mandatory eye exams with assessment of the visual field in elderly people holding a driving licence will become more and more important, especially in a continuously ageing and increasingly mobile population. MATERIALS AND METHODS In this prospective study, 80 patients with overt glaucoma and 52 patients without glaucoma, all holders of a valid driving licence, were enrolled. For each patient, the best corrected visual acuity was recorded and an examination of the central visual field was performed with automatic perimetry. In addition, a detailed questionnaire about the current driving habits of the patient was requested. RESULTS In summary, 29 patients (36 %; 95 % CI: 26 - 48 %) of 80 glaucoma patients were driving a motor vehicle with binocular congruent scotomata within the central 30 degrees visual field, which is not sufficient to meet current legal requirements in Austria. In addition, 3 out of 29 impaired patients had a visual acuity that was below the mandatory legal requirements. A total of 39 patients (49 %; 95 % CI: 37 - 60 %) of the glaucoma patients fulfilled legal requirements. Examination of these patients showed only monocular or binocular central visual field defects that were not congruent. However, 12 (15 %; 95 % CI: 8 - 25 %) patients were holders of a valid driving licence, but had stopped driving some time ago. Based on the prevalence of glaucoma and the number of driving licence holders, the projected number of actively driving glaucoma patients who do not meet the legal requirements regarding the visual field is probably around 15,400 (7,400 - 29,500) in Austria and around 163,500 (79,000 - 313,500) in Germany. CONCLUSIONS Time limits for the validity of the driving licence within the European Community have been set. In addition, the legal requirements for driving a motor vehicle should also be clearly defined, especially the requirements regarding the visual field and the acceptable dimensions of central scotomata. In addition, a mandatory eye exam for older drivers to be performed by ophthalmologists should be considered in order to detect persons posing a safety risk in traffic.
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Affiliation(s)
- C Nischler
- Universitätsklinik für Augenheilkunde und Optometrie, Paracelsus Medizinische Privatuniversität Salzburg.
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Massieux B, Boivin MEY, Van Den Ende FP, Langenskiöld J, Marvan P, Barranguet C, Admiraal W, Laanbroek HJ, Zwart G. Analysis of structural and physiological profiles to assess the effects of Cu on biofilm microbial communities. Appl Environ Microbiol 2004; 70:4512-21. [PMID: 15294780 PMCID: PMC492431 DOI: 10.1128/aem.70.8.4512-4521.2004] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
We investigated the effects of copper on the structure and physiology of freshwater biofilm microbial communities. For this purpose, biofilms that were grown during 4 weeks in a shallow, slightly polluted ditch were exposed, in aquaria in our laboratory, to a range of copper concentrations (0, 1, 3, and 10 microM). Denaturing gradient gel electrophoresis (DGGE) revealed changes in the bacterial community in all aquaria. The extent of change was related to the concentration of copper applied, indicating that copper directly or indirectly caused the effects. Concomitantly with these changes in structure, changes in the metabolic potential of the heterotrophic bacterial community were apparent from changes in substrate use profiles as assessed on Biolog plates. The structure of the phototrophic community also changed during the experiment, as observed by microscopic analysis in combination with DGGE analysis of eukaryotic microorganisms and cyanobacteria. However, the extent of community change, as observed by DGGE, was not significantly greater in the copper treatments than in the control. Yet microscopic analysis showed a development toward a greater proportion of cyanobacteria in the treatments with the highest copper concentrations. Furthermore, copper did affect the physiology of the phototrophic community, as evidenced by the fact that a decrease in photosynthetic capacity was detected in the treatment with the highest copper concentration. Therefore, we conclude that copper affected the physiology of the biofilm and had an effect on the structure of the communities composing this biofilm.
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Affiliation(s)
- B Massieux
- Netherlands Institute of Ecology, Centre for Limnology, Rijkstraatweg 6, 3631 AC Nieuwersluis, The Netherlands.
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Pieh S, Hanselmayer G, Lackner B, Marvan P, Grechenig A, Weghaupt H, Vass C, Skorpik C. Tritan colour contrast sensitivity function in refractive multifocal intraocular lenses. Br J Ophthalmol 2001; 85:811-5. [PMID: 11423455 PMCID: PMC1724048 DOI: 10.1136/bjo.85.7.811] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
AIMS To compare tritan colour contrast sensitivity (CCS), without and with glare, in patients with refractive multifocal intraocular lenses (IOLs) and with monofocal intraocular lenses. METHODS Tritan CCS was determined (Moorfields Vision System, CH Electronics) in 15 eyes (14 patients, 75.7 (+/-6.6) years) with a refractive multifocal IOL (Allergan SA 40N) and in 11 eyes (10 patients, 73.7 (+/-6.4) years) with a monofocal IOL (Allergan SI 40 NB). Measurements were made monocularly under mesopic conditions at a distance of 2 metres from the monitor with best distance refraction plus 0.5 D at 0.5, 1, 3, 6, 11.4, and 22.8 cycles per degree (cpd). The test was then repeated for the multifocal IOLs, adding minus 2.5 D to the best distance refraction to force the patient to use the near focus. Both lenses were also investigated under glare conditions with the same set-up and using the brightness acuity tester (BAT). RESULTS The tritan CCS function without glare in multifocal lenses through the distance focus was nearly identical to that through the near focus. The following statistically significant differences were measured: the CCS function without glare for the multifocal lens was worse at 0.5 cpd and 1.0 cpd than that of the monofocal lens. In CCS testing of the multifocal group with glare at 6 cpd, the results through the distance focus were better than the results through the near focus. For the CCS function with glare, the values for the distance focus in the multifocal lens were worse than the values for the monofocal lens at 0.5 cpd and 1 cpd. In CCS testing with glare through the near focus and CCS testing through the monofocal lens, the monofocal lens performed better at 0.5 cpd, 1 cpd, 3 cpd, and 6 cpd. CONCLUSION Refractive multifocal intraocular lenses influence tritan CCS function compared to monofocal lenses.
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Affiliation(s)
- S Pieh
- Department of Ophthalmology, University of Vienna, Medical School, Währinger Gürtel 18-20, 1090 Vienna, Austria.
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Marvan P, Komárek J, Comas A. Weighting and scaling of features in numerical evaluation of coccal green algae (genera of the Selenastraceae). ACTA ACUST UNITED AC 1984. [DOI: 10.1127/algol_stud/67/1984/363] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [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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Chromek J, Kupec J, Marvan P, Mládek M. Möglichkeiten der Nachreinigung von Abwässern aus der Kunstlederproduktion mit Hilfe von Algen. ACTA ACUST UNITED AC 1983. [DOI: 10.1002/aheh.19830110312] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [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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Marvan P, Megret M, Wackenheim A. [The diagnosis of subtentorial tumours by vertebral angiography (author's transl)]. Wien Klin Wochenschr 1975; 87:235-48. [PMID: 1084627] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
The diagnosis of space-occupying lesions in the subtentorial space by vertebral angiography is based upon a good knowledge of arteries and veins and topographic points of this region. An imaginary line between the colliculo-central point and the chorioidal point divides the posterior fossa into two imaginary parts. In this way it is possible to localize displacements in the region of the posterior fossa. Of course, the displacement of the veins and arteries is very important in the verification of the tumours. Consequently, vertebral angiography is of vital importance in the investigation of space-occupying lesions in the posterior fossa.
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Wackenheim A, Braun JP, Babin E, Tournade A, Dupuis M, Haller M, Marvan P, Matias J. The herniation of the superior cerebellar vermis. Neuroradiology 1974; 7:221-7. [PMID: 4416291 DOI: 10.1007/bf00342702] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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Gordon HW, Rywlin AM, Sussman H, Marvan P. The effect of digitalis therapy on the vaginal cytology in postmenopausal females. Negative results in a pilot study. Am J Obstet Gynecol 1966; 94:524-6. [PMID: 5903674 DOI: 10.1016/0002-9378(66)90055-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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