Enhancing the evanescent field in TiO2/Au hybrid thin films creates a highly sensitive room-temperature formaldehyde gas biosensor

Highly Selective Gas Sensor Based on Hydrophobic Silica Decorated with Trimethoxyoctadecylsilane

“…From a review of the literature on selective gas-sensing research, we determined the relative selectivity performance. The properties of typical gas sensors with different sensor species are shown in Table . − Metallic oxide materials have been adapted for application in mass gas sensors such as surface acoustic wave (SAW) sensors, ,,− which can selectively detect nitrogen oxide at room temperature. For those sensors, S can reach at least 89%.…”

“…18,22 These have a wide range of S values, and the working temperature is normally very high. Semiconductor materials such as ZnO, 25 TiO 2 28 and WO 3 30 are suitable for usage as optical gas sensors such as surface plasmon resonance (SPR) sensors for the detection of alcohol vapors, whose response signal was simple with average S values. Additionally, we determined S based on quartz crystal microbalance (QCM) sensors (as shown in Table 2).…”

“…S SO 2 of reduced graphene oxide prepared by Kumar et al 22 achieved 61.3%, while S SO 2 of carbon nanotubes prepared by Hoang et al 40 selective for H 2 S (88.5%). Kim et al 28 successfully prepared Au-doped TiO 2 , which could successfully select HCHO from VOCs (S = 83.3%). On the other hand, different methods of data analysis, such as establishing multiple-channel sensor arrays and using SPSS data analysis software for assistance, could also help with selective detection.…”

High-Tech and Nature-Made Nanocomposites and Their Applications in the Field of Sensors and Biosensors for Gas Detection

“…Optical-based sensors TiO 2 /Au polymer modified thin films were used to create an advanced type of formaldehyde gas sensor [13]. This particular gas sensing material was used to detect low amounts of formaldehyde interacting on the surface of the material using the optical-based detection method of surface plasmon resonance (SPR).…”

“…SEM images of the modified thin films developed ((A) and (B)), elemental analysis (C), and result obtained with the surface plasmon resonance (SPR) technique for the detection of formaldehyde (D). Reproduced from[13] with permission from Elsevier (License number 4927020376869).…”