Figure 1: Schematic illustration of a graphene–hemin conjugate device.
From: Real-time electrical detection of nitric oxide in biological systems with sub-nanomolar sensitivity
(a) Schematic of a graphene sensor with integrated microfluidic sample delivery system. (b) Schematic illustration of a graphene–hemin FET that can selectively respond to NO. A typical graphene device has an active area of 0.5 × 0.5–0.5 × 2 μm2, sizes of source and drain electrodes are 2 × 5 μm2 (excluding the electrical leads) and the size of gate electrode is 50 × 50 μm2. The microfluidic PDMS channel has a width of 1 mm, height of 0.5 mm and length of 1 cm.
