Observation and Measurement of Negative Differential Resistance on PtSi Schottky Junctions on Porous Silicon. - Seyedeh Maryam Banihashemian; Hassan Hajghassem; Alireza R. Erfanian; Majidreza Aliahmadi; Mansor Mohtashamifar; Seyed Mohamadhosein Mosakazemi (Sensors, 2010)