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SnO 2 chemical sensors were fabricated by two different methods. The first one was based on contacting individual nanowires by in situ nanofabrication in a Focused Ion Beam (FIB) microscope. The second one, the traditional sol-gel method, was based on tin dioxide nanopowder thermal agglomeration. Both types of sensors were capable of detecting air-diluted NH3 to the parts per million level...
In this work, a micromechanics approach is proposed for correlating the dependence of the macroscopic (or effective) stiffness and strength properties of concrete on the sizes of aggregate particles with the existence and damage of interfacial transition zones. Next, this approach is applied to concrete consisting of a paste with spherical isotropic aggregates.
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