Table 2.

Comparison of glass, silicon, PDMS and paper as a sensor-substrate (redrawn from [21]).

Property	Glass	Silicon	PDMS	Paper
Surface profile	Very low	Very low	Very low	Moderate
Flexibility	No	No	Yes	Yes
Structure	Solid	Solid	Solid, gas-permeable	Fibrous
Sensitivity to moisture	No	No	No	Yes
Disposability	No	No	No	Yes
High-throughput fabrication	Yes	Yes	No	Yes
Functionalization	Difficult	Moderate	Difficult	Easy
Homogeneity of material	Yes	Yes	Yes	No
Price	Moderate	High	Moderate	Low
Initial investment	Moderate	High	Moderate	Low