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SER spectra of PRNL.
Notes: SER spectra of PRNL recorded using as substrates 1 mL OH AuNPs at pH =4 (b) and pH =10 (c). The SER spectrum of PRNL recorded on “classical” citrate-capped AuNPs is presented for comparison (a). The final concentration of PRNL was 2 mM. The spectra were recorded using a 785 nm excitation laser.
Abbreviations: SER, surface-enhanced Raman; PRNL, propranolol; OH, Origanum herba; AuNP, gold nanoparticle; au, atomic unit.
