A reversible field induced phase transition in semiconducting films of silver and copper TNAP radical-ion salts

Potember, Richard S.; Poehler, T. O.; Rappa, Angela; Cowan, Dwaine O.; Bloch, A. N.

doi:10.1021/ja00530a075

Cited by 57 publications

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“…Organic charge‐transfer complexes have been attractive research candidates over decades due to their unique properties for potential applications 1–16. Copper 7,7,8,8‐ tetracyano‐ p ‐quinodimethane (CuTCNQ) is a representative of these complexes due to its electric‐field‐induced bistable switching phenomenon for practical memory and switching devices 1, 2, 17–21. However, despite extensive efforts devoted to controllable synthesis, device fabrication, performance measurement, and switching mechanism analysis to understand this material, there remain diverse views regarding its switching nature.…”

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confidence: 99%

Mass‐Production of Single‐Crystalline Device Arrays of an Organic Charge‐Transfer Complex for its Memory Nature

Liu

Meng

et al. 2012

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Mass‐Production of Single‐Crystalline Device Arrays of an Organic Charge‐Transfer Complex for its Memory Nature

Liu

Meng

et al. 2012

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“…MeCN is a preferred medium of choice for the synthesis of CuTCNQ in conventional wet chemical route, wherein a Cu foil is dipped in a solution of TCNQ 0 dissolved in MeCN . A simple one electron transfer reaction between the Cu metal (solid) and TCNQ (MeCN) , results in the spontaneous crystallization of blackish‐blue colored CuTCNQ (solid) on the surface of the Cu foil (Equation ).…”

Section: Resultsmentioning

confidence: 99%

Role of Water in the Dynamic Crystallization of CuTCNQ for Enhanced Redox Catalysis (TCNQ = Tetracyanoquinodimethane)

Siu

Anderson

Mohammadtaheri

et al. 2017

Adv Materials Inter

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have established a breadth of TCNQ-based charge-transfer complexes, each with unique properties. While growing recognition of TCNQ-based materials has led to a number of fabrication strategies including electrochemical, vapor deposition, and wet chemical routes; the applicability of these materials has until recently been severely restricted to electronics. [21][22][23][24][25][26] A unique subset of this group of materials is MTCNQ ionic charge transfer complexes, wherein M corresponds to a transition metal cation (CuTCNQ and AgTCNQ are the most extensively studied) and TCNQ is an anion. [1][2][3][4][5][6][7][8] The presence of transition metal in these metal-organic charge transfer complexes offers a unique opportunity to combine their inherent organic semiconducting properties with the well-established applications of metals in catalysis, sensing, and biology. In recent years, our group and others have shown the potential of these materials beyond electronics, such that CuTCNQ and its metal composites were found as outstanding catalysts for electron transfer and dye degradation reactions; [1][2][3]5] CuTCNQ/ZnO heterojunctions as a humidity sensor; [27] CuTCNQ nanoarrays as pressure sensors; [28] KTCNQ, NaTCNQ, and LiTCNQ as highly specific NO x /H 2 gas sensors; [29,30] and AgTCNQ as antimicrobial agents. [31] These emerging applications of MTCNQ materials now warrant new developments in the current fabrication strategies such that obtained materials are best suited for the targeted application.For CuTCNQ, the current wet chemical fabrication strategy employs a Cu foil (Cu 0 ) as a source of metal, which is immersed in a TCNQ 0 solution dissolved in acetonitrile (MeCN). [1][2][3]32] A spontaneous redox reaction leads to crystallization of phase I CuTCNQ [i.e., Cu + TCNQ − ] microrods vertically aligned on the surface of the Cu foil. [21] A limitation of this approach is that the length of the CuTCNQ microrods is typically restricted to ≈10-15 µm. This is primarily because the as-synthesized CuTCNQ concomitantly dissolves into Cu + and TCNQ − ions on prolonged exposure to MeCN. [32] The concurrent dissolution/ crystallization of CuTCNQ does not allow the growth of these materials beyond certain dimensions. [32] In addition to dissolution, a physicochemical change occurs through which the original conductive phase I CuTCNQ (4.8 × 10 −3 S cm −1 ) transforms A new bisolvent approach is introduced to overcome the limitation of wet chemical routes of a semiconducting phase I CuTCNQ (7,7,8,8-tetracyanoquinodimethane) synthesis, which currently does not allow these materials to be grown beyond certain dimensions (10-15 µm). The use of water as a cosolvent during acetonitrile-mediated conventional synthesis of CuTCNQ allows a dynamic control over its crystallization and dissolution process through favorably shifting the reaction equilibrium. This enables CuTCNQ structures of unique morphologies with secondary growth, alongside dimensions exceeding 100 µm to be produced. These new morphologies of phase I CuTCNQ show re...

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“…3 Since Potember et al reported stable and reproducible switching phenomena between two resistant states induced by an applied electric field in the charge transfer complex thin films of Ag-TCNQ and Cu-TCNQ, 4,5 in-depth studies of electronic and optical properties of such devices have been carried out extensively. 3 Since Potember et al reported stable and reproducible switching phenomena between two resistant states induced by an applied electric field in the charge transfer complex thin films of Ag-TCNQ and Cu-TCNQ, 4,5 in-depth studies of electronic and optical properties of such devices have been carried out extensively.…”

Section: Introductionmentioning

confidence: 99%

Novel C60–DDME complex thin film with electrical bistable properties

Ouyang

Xue

Wang

et al. 1997

Journal of Vacuum Science &Amp; Technology B: Microelectronics and Nanometer Structures Processing, Measurement, and Phenomena

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Articles you may be interested inGrowth, electrical, and optical properties of nanocrystalline VO 2 (011) thin films prepared by thermal oxidation of magnetron sputtered vanadium films J. Vac. Sci. Technol. A 28, 595 (2010); 10.1116/1.3443562 Switching effect in Cu:TCNQ charge transfer-complex thin films by vacuum codeposition Appl. Phys. Lett. 83, 1252 (2003); 10.1063/1.1600848Effect of the disorder/order phase transition on the electrical and photoelectrical properties of C 60 thin films Using a new kind of organic complex system of electrical bistability for ultrahigh density data storage A novel C 60 -DDME complex thin film was prepared by a new modified vacuum deposition technique. Stable and reproducible electrical bistable properties are observed in the C 60 -DDME thin films. The structure and spectroscopy characteristics of the complex C 60 -DDME thin film are considerably different from those of both DDME and C 60 thin films, as is revealed by high resolution scanning electron microscopy, x-ray diffraction, and ultraviolet-visible absorption spectra.

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A reversible field induced phase transition in semiconducting films of silver and copper TNAP radical-ion salts

Cited by 57 publications

References 1 publication

Mass‐Production of Single‐Crystalline Device Arrays of an Organic Charge‐Transfer Complex for its Memory Nature

Mass‐Production of Single‐Crystalline Device Arrays of an Organic Charge‐Transfer Complex for its Memory Nature

Role of Water in the Dynamic Crystallization of CuTCNQ for Enhanced Redox Catalysis (TCNQ = Tetracyanoquinodimethane)

Novel C60–DDME complex thin film with electrical bistable properties

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