In recent years, the development of analytical strategies has led to an evolution of sustainable and low-cost procedures. A very good example of this is paper-based chemical and biological sensors, which offer several advantages such as ease of use, flexibility, small size, and the ability of paper to absorb and retain liquids. But, without a doubt, what makes them most attractive is the simplicity of their fabrication. This, apart from being an environmentally friendly alternative and making them very affordable, allows us the possibility of customizing them for specific uses. In this work, the intention is to develop from scratch a handmade electrochemical sensor with graphite and silver ink electrodes. This device must be able to work even immersed in a solution and give results in a series of electrochemical measurements. We will synthesize as many of the compounds as we need and adapt the fabrication to the materials that we have. In addition, we will try a modification to specify the sensitivity of the device.

Treballs Finals de Grau de Química, Facultat de Química, Universitat de Barcelona, Any: 2022-2023, Tutor: Fabrizio Sordello. Treball defensat a la Università degli Studi di Torino