Preparation and electrical/optical bistable property of potassium tetracyanoquinodimethane thin films

Electrical Switching and Bistability in Organic/Polymeric Thin Films and Memory Devices

“…It has already been demonstrated that 8HQ and gold NPs can act as electron donors [33] and acceptors, [34] respectively. Moreover, the different surface potentials of the Au-DT NPs + 8HQ + PS film after treatment with different electric fields suggest that the electric field can induce polarization of the film.…”

Electrical Bistable Characteristics of Organic Charge Transfer Complex for Memory Device Applications

“…Recently, considerable attention has been directed toward electrical switching and memory devices which consist of organic materials, polymers and charge transfer complexes with an electrical bistable function [13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31]. Memory devices based on organic (polymer) materials have many advantages compared to inorganic memory devices, such as flexibility, simple processing, a low cost, and largearea fabrication via printing technology.…”

“…These conditions include a lower threshold voltage (<5 V), a higher ON/OFF ratio (>orders of 103), a rapid switching time (<100 ns), longer retention (>10 years at 60 o C), higher duration (>106 cycles) and a high memory capacity (>109 bite). Among the several types of organic (polymer) memory devices, such as trapping filling [13], filamentary conduction [14,15], electrochromicity [16], electroreduction and conformation changes of molecules [17,18], organic/metal/organic (O/M/O) structures [19][20][21][22] and charge transfer (CT) complex [23][24][25][26][27][28][29][30][31], last two organic (polymer) memory devices, organic/metal/organic (O/M/ O) structures and charge transfer (CT) complex, are entitled to be used for practical application. Especially, organic (polymer) memory devices based on the CT complex are expected to show fastest switching times (<10 ns), as the switching takes place via a rapid electronic process (redox reaction) rather than a slow process (chemical reaction, a conformational change, or isomerization), as reported in other memory devices.…”

“…The high built-in field which forms between the Al/Al2O3 and the CT complex layer controls the charge transfer between the donor and the acceptor. After the Cu:TCNQ CT complex memory device was reported, several types of CT complex organic memory devices were reported by changing the copper metal donor with a different metal [24] or with an alkali-metal donor [25], or using new types of organic donors and acceptors [26,27] with different electron donating and accepting capabilities. In memory devices based on the CT complex, ON and OFF switching were realized by the formation and de-formation of the CT complex via an electron transfer between the donor and the acceptor [29][30][31].…”

An Inexpensive Biosensor for Uric Acid Determination in Human Serum by Flow-Injection Analysis

“…The inclusion of redox mediators in carbon paste electrodes (CPE) gives rise to modified electrodes (MCPE).They act as electron-transfer, providing electrode hopping between the enzyme and the electrode support rendering measurements insensitive to oxygen fluctuations which can be carried out at lower, more negative potentials where the interfering reactions from physiologically coexisting electroactive species do not interfere [18,19]. Organic and organometallic redox compounds, such as ferrocene and quinone derivatives, ruthenium complexes, ferricyanide, phenoxazine compounds and organic conducting salts [14] have been used as electron mediators.…”