Hybrid Semiconducting Materials: New Perspectives for Molecular‐Scale Information Processing

Gawęda, Sylwia; Kowalik, Remigiusz; Kwolek, Przemysław; Macyk, Wojciech; Mech, Justyna; Oszajca, Marcin; Podborska, Agnieszka; Szaciłowski, Konrad

doi:10.1002/9783527645442.ch7

Cited by 4 publications

(4 citation statements)

References 177 publications

(232 reference statements)

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“…Although, the internal electrostatic field was changed, the shape of photocurrent density curve did not affect by increasing of bias potential due to the relative minor effect. This phenomenon was consistent with the results reported by others [39,41]. The photocurrent density of Photoactivity of different synthesized photoelectrodes was also investigated by chronoamperometry technique (photocurrent transient).…”

Section: Physical and Chemical Characterizationssupporting

confidence: 91%

Constructing BiVO4/Graphene/TiO2 nanocomposite photoanode for photoelectrochemical conversion applications

Yousefzadeh

Faraji

Moshfegh

2016

Journal of Electroanalytical Chemistry

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BiVO 4 /Graphene/TiO 2 as a novel nanocomposite photoanode was designed, synthesized and characterized for photoelectrochemical application. BiVO 4 /Graphene nanocomposite was initially synthesized by photocatalytic process and then, BiVO 4 /Graphene/TiO 2 nanocomposite thin film was prepared by deposition of the BiVO 4 /Graphene solution onto the surface of sol-gel derived TiO 2 thin film. Morphology, crystal structure, surface chemical composition and optical properties of the synthesized BiVO 4 /Graphene/TiO 2 nanocomposite thin film were characterized and compared with the BiVO 4 /Graphene and pure TiO 2 samples. Observations of scanning electron microscopy (SEM) images revealed that the surface of the TiO 2 thin film was modified by the BiVO 4 /Graphene with high surface area. According to X-ray diffraction (XRD) analysis, formation of anatase and monoclinic phase was confirmed for crystalline structure of TiO 2 and BiVO 4 , respectively. UV-visible absorption spectra of the samples showed that the absorption edge and intensity of the BiVO 4 /Graphene/TiO 2 nanocomposite film were increased with respect to the TiO 2 film. The BiVO 4 /Graphene/TiO 2 nanocomposite photoanode yielded a photocurrent density of ∼1.30 A/m 2 as compared to 0.27 A/m 2 for the TiO 2 at 0.8 V vs Ag/AgCl under UV

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Section: Physical and Chemical Characterizationssupporting

confidence: 91%

Constructing BiVO4/Graphene/TiO2 nanocomposite photoanode for photoelectrochemical conversion applications

Yousefzadeh

Faraji

Moshfegh

2016

Journal of Electroanalytical Chemistry

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“…Among others, the electrochemistry of selenium is being thoroughly investigated and the papers concerned with this topic increasingly appeared in the literature [4] (and references therein). This is a consequence of the fact that the electrochemistry gives many possibilities of producing selenium [5], recover it from wastes [6], analyze its concentration in solutions [7] and carrying out synthesis of various materials containing this element e. g. semiconductors, nanoparticles and quantum dots based on polychalcogenides [2,[8][9][10][11][12][13][14][15][16][17]. Potential uses of such materials are highly desirable in technological applications related with optoelectronics, advanced thin film solar cells, IR detectors, solid state lasers, multipurpose sensors or thermoelectric materials [1,3,4].…”

Section: Introductionmentioning

confidence: 99%

The Voltammetric Analysis of Selenium Electrodeposition from H2SeO3 Solution on Gold Electrode

Kowalik¹

2015

Archives of Metallurgy and Materials

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The different voltammetry techniques were applied to understand the process of selenium deposition from sulfate solution on gold polycrystalline electrode. By applying the cycling voltammetry with different scan limits as well as the chronoamperometry combined with the cathodic and anodic linear stripping voltammetry, the different stages of the deposition of selenium were revealed. It was found that the process of reduction of selenous acid on gold surface exhibits a multistage character. The cyclic voltammetry results showed four cathodic peaks which are related to the surface limited phenomena and which coincide with the bulk deposition process. The fifth cathodic peak is related to the reduction of bulk deposited Se 0 to Se −2 ions. Furthermore, the connection of anodic peaks with cathodic ones confirmed the surface limited process of selenium deposition, bulk deposition and reduction to Se −2 . Additionally, the cathodic linear stripping voltammetry confirms the process of H 2 SeO 3 adsorption on gold surface. The experiments confirmed that classical voltammetry technique proved to be a very powerful tool for analyzing the electrochemical processes related with interfacial phenomena and electrodeposition.Keywords: Selenium, selenous acid, electrodeposition, adsorption, cyclic voltammetry, goldZastosowano różne techniki woltamperometryczne w celu pełnego zrozumienia procesu osadzania selenu metodą elektrochemiczną na elektrodzie złotej. Wykorzystano w tym celu cykliczną woltamperometrię, a także chronoamperometrię połączona z katodową i anodową woltamperometrią inwersyjną. Wykazano, że proces osadzania selenu jest bardzo złożony i zachodzi w kilku etapach. Wyróżniono etap podpotencjałowego osadzania selenu, następnie zachodzi redukcja zaadsorbowanych cząsteczek kwasu selenowego(IV), po którym następuje nadpotencjałowe osadzanie selenu. W zakresie wysokich nadpotencjałów dochodzi do redukcji Se 0 do jonów Se 2 −.Powyższe eksperymenty potwierdziły wysoką przdatność technik woltamperometrycznych jako metody badawczej w celu analizy mechanizmu osadzania powłok metodą elektrochemiczną.

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“…Molecular switches have received much attention as potential components for the development of memory or optical devices and sensors. − In particular, multistable molecular switches, that is, those which respond to a combination of different inputs, corresponding to Boolean operations, are thus mandatory for the construction of molecule-based electronic devices. , …”

Section: Introductionmentioning

confidence: 99%

Photochromic Metallopolymer Based on Dithienylethene as a Molecular Calculator

et al. 2022

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Switchable compounds have been often described as promising candidates for electronic applications such as molecular-scale calculators. A step further is the combination of several different switchable molecules in larger functional macromolecules to design more sophisticated Boolean logic gates. Here, complex logic devices have been built via a redoxand photoactive metallopolymer based on dithienylethene-appended iron bisterpyridine units. The commutation of individual building blocks of the metallopolymer is achieved using light or an electrical stimulus, thus demonstrating a way to build multiswitchable molecular logic gates by a rational chemical design. This functional material exhibits five accessible and distinguishable stable states that can be used as AND and OR logic gates, as a half-adder or multiplexer.

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Hybrid Semiconducting Materials: New Perspectives for Molecular‐Scale Information Processing

Cited by 4 publications

References 177 publications

Constructing BiVO4/Graphene/TiO2 nanocomposite photoanode for photoelectrochemical conversion applications

Constructing BiVO4/Graphene/TiO2 nanocomposite photoanode for photoelectrochemical conversion applications

The Voltammetric Analysis of Selenium Electrodeposition from H2SeO3 Solution on Gold Electrode

Photochromic Metallopolymer Based on Dithienylethene as a Molecular Calculator

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