An electronic component includes a semiconductor substrate, an epitaxial semiconductor layer over the semiconductor substrate, and a semiconductor region in the epitaxial semiconductor layer. A Hall-voltage generator is coupled to the housing in a fixed position. The methods of the invention provide a rapid and cost-effective method to screen for compounds that prevent protein misfolding andor protein fibril formation andor protein aggregation which includes numerous neurodegenerative diseases including Parkinson’s disease, Alzheimer’s disease, Huntington’s disease as well as non-neuronal diseases such as type 2 diabetes.