Figure 2

SR-microFTIR spectra of bulk 4ATP (purple line) and of 20 nm 4ATP-AuNPs (grey line) acquired at the Diamond Light Source. The estimated enhancement factor due to the SEIRA effect is of ~200.
SR-microFTIR spectra of bulk 4ATP (purple line) and of 20 nm 4ATP-AuNPs (grey line) acquired at the Diamond Light Source. The estimated enhancement factor due to the SEIRA effect is of ~200.