(Invited) Channel Length Dependence of Mechanical Strain for Flexible (a-IGZO) TFT

Soft Matter ◽  
2021 ◽  
Author(s):  
Soichiro Tottori ◽  
Karolis Misiunas ◽  
Vahe Tshitoyan ◽  
Ulrich Keyser

Understanding the diffusive behavior of particles and large molecules in channels is of fundamental importance in biological and synthetic systems, such as channel proteins, nanopores, and nanofluidics. Although theoretical and...


2021 ◽  
Vol 21 (8) ◽  
pp. 4462-4465
Author(s):  
Taeho Park ◽  
Kyoungah Cho ◽  
Seunggen Yang ◽  
Sangsig Kim

In this study, we investigated thermoelectric materials with durability against mechanical stress using Ag2Se nanoparticle (NP) thin films and colorless polyimide (CPI) substrates. Ag2Se NP thin films and CPI substrates were produced by spin-coating, and their thicknesses were 40 nm and 15 μm, respectively. A bendable thermoelectric film with a channel length of 40 μm and a channel area of 1.6 μm2 generated a Seebeck voltage of 1.43 mV at a temperature difference of 4.5 K. Owing to the thickness of the extremely thin thermoelectric film and substrate, the mechanical strain was only 0.15% even when the thermoelectric devices were bent with a curvature of 3 mm. Therefore, it was determined that the bendable thermoelectric film was robust against mechanical stress.


1999 ◽  
Vol 277 (5) ◽  
pp. L968-L974 ◽  
Author(s):  
Steven S. An ◽  
Chi-Ming Hai

Mechanical strain regulates the maximal level of myosin light chain phosphorylation mediated by muscarinic activation in airway smooth muscle. Accordingly, we tested the hypothesis that mechanical strain regulates maximal phosphatidylinositol (PI) turnover ( V max) coupled to muscarinic receptors in bovine tracheal smooth muscle. We found that PI turnover was not significantly length dependent in unstimulated tissues. However, carbachol-induced PI turnover was linearly dependent on muscle length at both 1 and 100 μM. The observed linear length dependence of PI turnover at maximal carbachol concentration (100 μM) suggests that mechanical strain regulates V max. When carbachol concentration-PI turnover relationships were measured at optimal length and at 20% optimal length, the results could be explained by changes in V max alone. To determine whether the length-dependent step is upstream from heterotrimeric G proteins, we investigated the length dependence of fluoroaluminate-induced PI turnover. The results indicate that fluoroaluminate-induced PI turnover remained significantly length dependent at maximal concentration. These findings together suggest that regulating functional units of G proteins and/or phospholipase C enzymes may be the primary mechanism of mechanosensitive modulation in airway smooth muscle.


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