Scalable gas sensors fabrication to integrate metal oxide nanoparticles with well-defined shape and size

Cu2O@PNIPAM core–shell microgels as novel inkjet materials for the preparation of CuO hollow porous nanocubes gas sensing layers

“…This result further suggests that Cu 2 O@PNIPAM core-shell nanoparticles can form very homogeneous patterns, which is critical to the high resolution pattern by inkjet printing and may be crucial in obtaining repeatable metal oxide based gas sensor fabrication. 19 Apart from homogeneous deposition of the particles with patterned distribution and smoother surface, the PNIPAM shells significantly improved the stability of the ink system by forming an extremely stable dispersion. As shown in Fig.…”

“…The highly homogeneous deposition of the Cu 2 O@PNIPAM particles may also point towards a method to improve the repeatability of metal oxide based gas sensors. 19 The experiments were conducted at different operation temperatures as well. Fig.…”

“…[16][17][18] Consequently, the deposition of Cu 2 O nanoparticles onto various substrates is of great importance in the construction of gas sensors, which has significant impact on the performance of the sensing layers. 19,20 Among the plethora of possible deposition techniques for nanostructures, 21 inkjet printing stands out as a flexible and scalable backend production process of functional layers. Inkjet printing has been one of the most effective deposition techniques due to its numerous advantages, such as economic use of functional materials, superior control of film thickness in nano-/micro-scale, and its feasibility to fabricate high quality patterns onto both hard and flexible substrates in a large volume production as well as in small batches.…”

Low-Power Odor-Sensing Network Based on Wake-Up Nodes

“…To detect H2S we employ copper(II) oxide (CuO) nanosphere-based functional layers [11] deposited onto micro-machined hotplates [12] via inkjet printing [13]. CuO is known to feature a highly specific reaction towards H2S even at room temperature [14], which ultimately leads to a break-down in electrical resistivity via a percolation phase transition [9,10].…”

Layer by Layer Deposition of Colloidal SnO2 Nano Particles

“…While intense research efforts in all of these areas are underway the use of wet-chemistry synthesized metal oxide particles in a colloidal dispersion in combination with inkjet printing offers distinct advantages because that offers a way to control most of the influencing parameter to a high degree [3]. Here we use a colloidal dispersion of SnO2 nanoparticles to deposit them layer-by-layer.…”