2. Experimental sections
2.1. Materials and reagents
2.2. Synthesis of capture probe
Preparation of detection probe
Preparation of detection probe
3. Results and discussion
3.1. The principle of the portable biosensor for PDGF-BB
The principle of the portable biosensor for PDGF-BB is shown in Fig. 1. Firstly, SA-PMPs with primary aptamer was formed as the capture probe and invertase-labeled secondary aptamer was regarded as the detection probe. In the absence of PDGF-BB, a weak interaction occurred between the two probes, resulting in a weak signal from the PGM. In the presence of PDGF-BB, the combination of the capture probe and the detection probe leads