week 2

This week more information about micro fluid was read as the technology of micro fluid is an important part of this project. Mainly the aim was found and the plans were set. It was understood that this sensor is supposed to have several recognition moiety to identify the metal ions in the wasted water. According to the different chemical reactions due to some ions being tested, it can be observed by machine or other ways. The different colour combination can represent which ions are in the water.

During this week, the target is more clear, and we had found the basic prototype of a fluorescence sensor by using the technology of micro fluid.

The most common unit of the Micro-fluidic chip is the T-sensor or Y-sensor, which is shown below.

Sample liquid (1) and reagent solution (2) are pushed into the main channel from the injection port respectively. Due to the macromolecule and the particles diffuse quickly and micromolecule diffuse slowly, ions, which are micromolecules diffused into the reagent quickly and have reaction in the interdiffusion region.

As it is known now that the array sensor can show different colour combinations to indicate different ions in the tested water. However this may test only one ion and cannot show if there are several other ions. This means that we have to find out or hypothesis what the result would be if there are other ions.

Because the micro fluid would not move itself, there has to be some other ways to make the fluid move. Currently, we may use the capillary effect or use pressure to pump the water into the sensor.