1. The present methods are fast, have good sensitivity and selectivity
for biothiols, and do not require expensive chemical modification.
2. They eliminate the needs for chemical modifications, and sophisticated
instrumentations are convenient and low cost.
3. So far, the analytical tools that were used to detect biothiols such as chromatography [29,30],massspectrometry[31–33],andfluorescence [23,34–46] are
expensive, sophisticated, need modification of long analysis times,
require expensive chemical modification and have low applicability.
4. To our best knowledge, these new materials offer great potentials for thiols and other molecule separation.
5. It can also serve for analyte ionization due to its large surface area [60–64]. 6. Recently, AgFeO2 was proposed for Surface Enhancement Raman Spectroscopy (SERS) [65].