Porous silicon micro- and nanoparticles for printed humidity sensors

Abstract

Accurate measurements of water vapor transmission through high-performance barrier layers Rev. Sci. Instrum. 83, 075118 (2012) Quantitative calcium resistivity based method for accurate and scalable water vapor transmission rate measurement Rev. Sci. Instrum. 82, 085101 (2011) Humidity response properties of a potentiometric sensor using LaF3 thin film as the solid electrolyte Rev. Sci. Instrum. 82, 083901 (2011) New Products Rev. Sci. Instrum. 82, 029501 (2011) Biologically inspired humidity sensor based on three-dimensional photonic crystals

Thermally Carbonized Porous Silicon and Its Recent Applications

“…In the second application, PSi nanoparticles have been utilized for the potential cheap mass production of sensor systems. Jalkanen et al produced undecylenic acid treated THCPSi micro‐ and nanoparticle ink, which was used to drop cast fully functional humidity sensors on a glass substrate on the top of inkjet‐printed silver electrodes . Interestingly, a narrow distribution of nanoparticles was found to provide the best adhesion between the particles.…”

How to Improve the Performance of Porous Silicon‐Based Gas and Vapor Sensors? Approaches and Achievements

“…Jalkanen et al showed that thermal hydrocarbonization (THC) of PSi also shows a strong decrease in hysteresis. The implementation of this approach allows the development of PSi‐based humidity sensors with negligible hysteresis (Figure ).…”

“…To impart hydrophilicity to the surface of the film, THCPSi films were treated with undecylenic acid by immersing the films in a solution of undecylenic acid for 12 h at 110 °C. Jalkanen et al believe that this functionalization of the surface minimizes the effect of capillary condensation and increases the role of surface effects in the gas‐detection phenomenon. Bjorkqvist et al showed that the continuous heating of PSi‐based sensors also reduced hysteresis drastically.…”

A predictive model for discrete cell gravure roll coating

“…Both coating and printing processes are of major industrial interest, being frequently encountered in the production of paper products, polymer sheets and a wide range of printed electronics. It is the latter which has attracted increasing attention in recent years, as printing of electronic circuitry and wide area coating, for example, lighting or photovoltaic applications (Krebs, 2009) places new requirements on coating and printing process technologies [ (Michels et al, 2014), (Pudas et al, 2005), (Mäkelä et al, 2007), (Jin et al, 2010), (Jalkanen et al, 2012), (Kumar, 2015)]. …”