The responsivity is defined as the ratio of the output voltage of the sensor to the incident power. The authors designed a web-shaped top electrode sellectchem which not only improves the heat absorption but also the heat uniformity throughout the ZnO layer. The responsivity Inhibitors,Modulators,Libraries of the sensor may be improved by opening the windows so that the ZnO layer can come into direct contact with the heat source. On the other hand, the contact windows may reduce the top-electrode area and disperse the electrode and this electrode area reduction and dispersion may degrade the responsivity of the sensor. Thus, in the layout design of the top electrode, both the size of the ZnO layer contact window and the dispersion of the top electrodes must be considered. This work designs a web-type top electrode.

The outer regions of the web type possess large ZnO layer contact windows, whereas the inner regions possess dense Inhibitors,Modulators,Libraries top electrodes.Figure 1.The senor structures and dimensions in ��m.3.?Preparation of Inkjet SolutionsThe ZnO inkjet solution is prepared by the sol-gel method, as shown in Figure 2(a). It is synthesized by dissolving Inhibitors,Modulators,Libraries 0.4 mol of zinc acetate into 120 mL ethylene glycol and heating at 140 ��C for 30 min, which results in a transparent solution. However, the solution will settle after cooling at room temperature for about 30 minutes. Therefore 280 mL ethanol are add into the solution which is sonicated for 30 minutes until the sediment is completely dissolved in ethanol. Filtration of the solution affords a clear and homogeneous ZnO solution.

Its molal concentration is 1 M, its viscosity is 14 CPS, its surface tension is 30 dynes/cm, and its pH value is 6. The inkjet material of the top electrode layer is a commercial alcohol-based nano-silver ink provided by Cabot Conductive Ink (CCI-300). Inhibitors,Modulators,Libraries Its viscosity and surface tension at room temperature are about 11�C15 CPS and 30�C33 mN/m respectively, the silver solids loading is about 19�C21 wt%, and its density is about 19�C21 g/mL.Figure 2.(a) The preparation process of ZnO inkjet solution; (b) the fabrication process flow of the flexible pyroelectric sensor.4.?Fabrication ProcessThe overall process flow is shown in Figure 2(b) while the parameters are detailed in Table 1. Firstly, the flexible aluminum sheet is cleaned with ethanol and then blow-dried with nitrogen.

Then atmospheric Entinostat plasma is used to make the surface of the aluminum sheet more hydrophilic, to improve the adhesion of the ZnO solution on the aluminum sheet. The aluminum sheet is placed onto the stage of the plasma equipment. The plasma is sprayed by a nozzle whose orifice diameter is 4 mm. The orifice of the plasma spray nozzle is at a distance of 25 mm from the aluminum sheet. Figure 3 shows that the contact angle changes from 78.49�� to 18.67�� after the plasma modification.Figure 3.The contact angle of the aluminum sheet before and after method plasma modification.Table 1.