The resistance values of all the elements in the humid synthetic air decrease as humidity increases, as shown in Figure 2d.The sensor response (S) of all the elements to the T�CVOC test gas under different humidity conditions is summarized in Figure 3. The sensor sellectchem response of the aged Pt,Pd,Au/SnO2 element is almost independent Inhibitors,Modulators,Libraries of humidity, as shown in Figure 3a. The plots of Figure 3b show that the sensor response of non-aged Pt,Pd,Au/SnO2 element to 1,000 ��g/m3 T�CVOC test gas at 75%RH is smaller than that to 800 ��g/m3 T�CVOC test gas at 25 and 50%RH. Thus, the S value of the non-aged Pt,Pd,Au/SnO2 element depends on humidity, especially under high humidity conditions. For the aged Pt/SnO2 element, the sensor response has almost the same performance as the Pt,Pd,Au/SnO2 elements at 25%RH.
However, the sensor performance is reduced drastically by increasing the relative humidity to higher than 50%RH. The degradation of the sensor performance on the aged Pt/SnO2 is almost the same as non-aged Pt/SnO2 [7]. The S values of room air (approximately 40%RH) and dry air aged Pt,Pd,Au/SnO2 elements are compared with those of the high-humidity and the Inhibitors,Modulators,Libraries non-aged Pt,Pd,Au/SnO2 elements in Figure 3d. Though the sensor performance of the room air-aged Pt,Pd,Au/SnO2 element is slightly reduced by
Sensing from the ultraviolet (UV)-visible to the infrared is critical for a variety of industrial and scientific applications, including image sensing, communications, environmental monitoring, remote control, day- and night-time surveillance and chemical/biological sensing [1�C3].
Today, separate sensors are fabricated from inorganic materials for different sub-bands within the UV to near-infrared (NIR) wavelength (��) range Inhibitors,Modulators,Libraries [4]. Colloidal inorganic semiconductor quantum dots (PbS) were used to fabricate NIR-photodetectors onto gold interdigitated electrodes [5,6]. These NIR-photodetectors showed photoconductive Inhibitors,Modulators,Libraries gain and photoresponse out to 1,450 nm [6]. However, the quantum dot NIR-photodetectors were fabricated using the ��in-plane�� structure with electrode spacing >5 ��m. As a result the required driving voltage is too high (>40 V) to be used with any commercially available thin film transistor (TFTs) arrays for read-out. These limitations significantly restrict the application of inorganic photodetectors in day- and night-time surveillance and chemical/biological sensing where high-speed Brefeldin_A and low power photodetectors are desired.
Polymer photodetectors (PPDs) have been the subject of extensive research in the past decade. PPDs offer a number of advantages: large-area detection, wide selection of materials, thin and light weight, low-cost fabrication on flexible substrates and operation at room temperature. PPDs with fast temporal-response selleck chemicals Lenalidomide have been reported [7�C10].