Ambient stability

Bodlaki, D., Yamamoto, H., Waldeck, D. H. and Borguet, E. Ambient stability of chemically passivated germanium interfaces. Surface Science 543, 63-74 (2003). 

These conducting polymers are easy to prepare and show excellent ambient stability and very rapid and reversible absorption kinetics. They have, therefore, attracted much attention in the area of chemical and bio sensing. Extensive research... 

A wide range of alternative silicon sources has been investigated, especially with regard to either lower temperature deposition and/or precursors with greater ambient stability. 

Alternative approaches to improve polymer ambient stability by increasing the ionization potential have utilized electron poor comonomers in the polymer backbone. Electron deficient six-membered rings, such as 1,2-pyrazine [37] or perfluorobenzene [38], have also been introduced into the backbone. These are able to planarize the backbone through the formahon of intrachain S-N or S-F bonding interactions. Increases in ionizahon potenhal can therefore be attributed solely to an electron-withdrawing effect. Ambient stabilities were not reported, but charge carrier mobilities were on the order of 10 cm s. 

Of the catalysts listed in Table 6.1, the Mo(CO)6/4-chlorophenol system has been most widely utilized for the preparation of linear PPEs, most notably by Bunz [15]. This shake and bake method boasts inexpensive starting materials, a high ambient stability, and the use of undried, un-degassed solvents - which, overall, makes it an attractive catalyst system for polymerization. One particular advantage is that, in contrast to the much more sensitive Schrock catalysts, rigorous air- and moisture-free conditions are not required for a high conversion. Heteroatoms also... 

Ambient stability impacts both the device lifetime and also the device off-current through the introduction of bulk charge carriers when the semiconductor becomes doped, thus contributing to an increase in the conductivity in the absence of a gate voltage. A contributing factor is the redox electrochemistry that can occur between a neutral p-type semiconductor and the combination of both oxygen and humidity in ambient air [17]. 

NR is primarily utilized in the tyre industry because of its ideal properties. However, it has poor stability due to the existence of many double or unsaturated bonds. To improve the ambient stability of NR, synthetic rubber was chosen for blending. Zhang and coworkers blended and vulcanized NR and chloroprene rubber at a weight ratio of 75/25 by using a two-roll mill. The NR/ chloroprene rubber blends had improved mechanical properties in terms of their elongation strength and Shore A hardness. Moreover, the vulcanized chloroprene rubber blends had excellent oil resistance, thermal stability, selfextinguishing ability and ozone resistance. 

In addition, all devices fabricated in ambient also exhibited ambipolar behaviors. The highest hole mobility was further improved to 1.85 cm s with a little decrease in electron mobility. The highest electron mobility is 0.43 cm s, and the average mobility is 0.38 cm s (Fig. 3.2a). These mobilities are the highest reported to date for an ambipolar FETs fabricated under ambient conditions [7]. The reference non-fluorinated polymer PII2T showed comparable hole mobilities but much lower electron mobilities. Electron mobilities of up to 0.07 cm s are observed for devices fabricated in glovebox but decreased sharply to 10 -10 cm s for devices fabricated under ambient conditions. Hence, fluorination can substantially increase the ambient stability of the devices. 

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