Figure 2. Experimental Setup (IMAGE) Institute for Basic Science Caption (a) Samples of the Aβ proteins in monomer (M), oligomer (O) and fibril (F) form are analysed inside small wells sandwiched by sapphire plates. With a small amount of sample, it was possible to detect THz signals without noise. (b) Solution-based sample preparation for the THz near-field time-domain spectroscopy system. Credit IBS Usage Restrictions Please indicate the credit. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.