Organic memory devices

Ferrocene copolymers, (II) and (III), exhibiting redox potentials were prepared by Choi et al. (2) and used in organic memory devices. 

A. Aviram, Organic Memory Device, United States Patent 3,833,894 (September 3,... 

Electrical bistability is indeed observed in the nanocomposite film verifying that the nonvolatile memory effect is present even at nanoscale dimensions. This observation will continue to drive researchers towards developing future organic memory devices. 

Organic photovoltaic cells (OPV) for mobile and stationary use. Organic memory devices for consumer goods,... 

Introduction Memory Organization Memory Device Types... 

Drug release systems, synthetic articular cartilages, ultrafiltration membranes pH-sensitive bio-actuators/sensors drug delivery devices materials for the dehydration process of alcohols, ethanol or methanol organic memory devices separation of organic solute molecules from water or electrolyte membranes for fuel cell applications... 

Ayesh A. L, Qadri S., Baboo V. J., Haik M. Y., and Haik Y. Nano-floating gate organic memory devices utilizing Ag-Cu nanoparticles embedded in PVA-PAA-glycerol polymer. Synth. Met. 183 (2013) 24-28. 

Das, B. C., PiUai, R. G., Wu, Y., and McCreery, R. L. 2013 Redox-gated three-terminal organic memory devices Effectof composition and environment on performance. ACSzlpp/. Mater. Inter. 5 11052—11058. 

In any real memory device the capacitors take up most of the chip area the transistors and resistors are very small. Therefore the FRAM roadmap [8] shown in Table 2 mandates a fully three-dimensional (3D) capacitor structure in the industry by 2008. The state of the art at present is a PZT-lined trench, a Tokyo Institute of Technology-Samsung collaboration that achieves a 6.5 1 aspect ratio for the trenches. Ru electrodes are used, prepared from the organic precursor Ru-DER, from Tosoh Corp. 

As discussed in the introduction, a major motivation for the development of methods to controllably functionalize silicon surfaces is the opportunity to create novel hybrid organic/silicon devices. By integrating organic molecules with silicon substrates it should be possible to expand the functionality of conventional microelectronic devices. Possibilities include high-density molecular memory and logic as well as chemical and biochemical sensors. Realization of these opportunities requires not only the development of the attachment chemistries, as discussed in the previous sections, but also detailed studies of the electronic properties of the resulting surfaces. 

There is no limit to the number of photochromic systems possible. The systems discussed are excellent candidates for integration into solid-state devices because nearly all retain their photochromic properties in the absence of solvent. The organization of these systems in tandem with other molecular systems is being pursued. For the switching applications many of these systems have much too slow a turnover rate to be explored as working devices. That is unless the connectivity in these systems can be increased. In the meantime, photochromic systems will probably be explored as possible optical memory devices. The most promising switches are those based on the much faster processes of electron and energy transfer. We will now examine research in these areas. 

Recently, efforts have been devoted to the fabrication and characterization of PbZri- Ti c03 family thin films for their potential applications in nonvolatile memory devices (See Ref. 17, for example). Partly because of the convenient stoichiometry control during processing, it was found that chemical methods, such as sol-gel and metal organic decomposition (MOD), are superior to physical means in many aspects. To appreciate better the science and technology of ferroelectric thin-film fabrication, it is important to give a brief account of the past efforts and the present status and, it is hoped, shed some light on the future. 

Overall, much effort has been made to develop biocompatible organic materials, which allows for the ultimate integration between the electronic device and biological system. The possibility of fabricating memory devices on biodegradable substrates, such as, rice paper and chitosan is also demonstrated. Biocompatible and flexible resistive switching memory devices are made on the basis of Ag-doped chitosan as the natural solid polymer electrolyte layer on the transparent and bendable substrate. Decomposable devices, where chitosan layer serves as the substrate while Mg as the electrode, have been also achieved (Hosseini and Lee, 2015). A comparison of the biocompatible material-based resistive switching memory devices is made in Table 3.2. 

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