Nano- and Microtechnology

Abstract

This article provides an overview of nano-electromechanical (NEMS) and micro-electromechanical (MEMS) systems and discusses ongoing research activities exploring potential applications for these systems. Advances in nano- and microtechnology have made it possible to manufacture small, intelligent, low-cost wireless devices that can be placed in concrete during mixing to provide real-time monitoring of workability and early-age properties. These devices also have potential application in detecting environmental and structural damage. A pilot study was conducted to investigate the feasibility of embedding and using NEMS and MEMS sensors in concrete. The sensor, which was designed to measure relative humidity and temperature in concrete, showed no indication of being negatively affected by the harsh concrete environment. A system for wireless data acquisition from humidity/temperature and accelerometer-based structural damage sensors was also evaluated. Findings from this ongoing research indicate that the sensors do have great potential for use in concrete structures.