Xiaofeng Shi, Yong-Hyok Kwon, Jun Ma, Ronger Zheng, Chunyan Wang and H.-D. Kronfeldt Trace analysis of polycyclic aromatic hydrocarbons using calixarene layered gold colloid film as substrates for surface-enhanced Raman scattering Journal of Raman Spectroscopy 44
A surface-enhanced Raman scattering (SERS) active substrate for the detection of polycyclic aromatic hydrocarbons (PAHs) was developed, which used 25, 27-dimercaptoacetic acid-26, 28-dihydroxy-4-terbutyl calixarene (DMCX) to functionalize a gold colloid film. With the use of this SERS-active substrate and with the application of the shifted excitation Raman difference spectroscopy technique, Raman signals of pyrene and anthracene in aqueous solutions at low concentration level (500 pM) can be obtained. Moreover, the Raman bands of PAHs adsorbed on DMCX-fuctionalized gold colloid film can be one-to-one correspondence with those of solid PAHs.
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