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Antonio Facchetti Polyera Corporation, www. The field of unconventional electronics represents a new opportunity for the semiconductor and electronics industries. The key component of all modern electronics is the thin-film transistor TFT, See Figure 1 for structure and function. The three fundamental TFT materials components are the contacts source, drain, and gate , the semiconductor, and the gate dielectric. Figure 1 Structure and operation of a thin-film transistor. The semiconductor field-effect mobility is calculated from the I-V data according to eq.

A dielectric affinity glucose microsensor using hydrogel-functionalized coplanar electrodes

Self-Assembled Nanodielectrics (SANDs) for Unconventional Electronics | Sigma-Aldrich

A supercapacitor SC , also called an ultracapacitor , is a high-capacity capacitor with a capacitance value much higher than other capacitors, but with lower voltage limits, that bridges the gap between electrolytic capacitors and rechargeable batteries. It typically stores 10 to times more energy per unit volume or mass than electrolytic capacitors, can accept and deliver charge much faster than batteries, and tolerates many more charge and discharge cycles than rechargeable batteries. Unlike ordinary capacitors, supercapacitors do not use the conventional solid dielectric , but rather, they use electrostatic double-layer capacitance and electrochemical pseudocapacitance , [4] both of which contribute to the total capacitance of the capacitor, with a few differences:. The electrolyte forms an ionic conductive connection between the two electrodes which distinguishes them from conventional electrolytic capacitors where a dielectric layer always exists, and the so-called electrolyte, e.

An Introduction to Biomedical Instrumentation

Integrating microfluidics with biosensors is of great research interest with the increasing trend of lab-on-the chip and point-of-care devices. Though there have been numerous studies performed relating microfluidics to the biosensing mechanisms, the study of the sensitivity variation due to microfluidic flow is very much limited. In this paper, the sensitivity of interdigitated electrodes was evaluated at the static drop condition and the microfluidic flow condition. In addition, this study demonstrates the use of gold nanoparticles to enhance the sensor signal response and provides experimental results of the capacitance difference during cancer antigen CA antigen—antibody conjugation at multiple concentrations of CA antigens.
Taking advantage of the triboelectrification effect and electrostatic induction, triboelectric nanogenerators TENGs provide a simple and efficient path to convert environmental mechanical energy into electric energy. Since the generation of surface charges and their density on triboelectric materials are the key factors in determining TENG performance, many efforts have been undertaken to engineer the structures and chemistry of triboelectric materials. Among others, dielectric control of triboelectric materials is an emerging approach because the dielectric constant is intimately correlated with the capacitance of materials. In this regard, we prepared porous polydimethylsiloxane PDMS composites decorated with Au nanoparticles NPs , which was designed to engineer the compressibility and dielectric constant of PDMS elastomer. This trade-off relationship has been discussed in terms of charge generation on the air surface and pores of NP-PDMS composites based on a recent experimental model.

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