SRN strings were coated with non-crosslinked PEG-b-PAEMA-b-PCMA micelles using either an electrospray or a standard jet nebulizer setup, and IR spectra covering the wavenumber range from 925 to 1920 cm−1 were obtained using NAM-IR (Fig. 7a). The NAM-IR spectra were normalized with respect to the QCL power. Fig. 7b shows a NAM-IR spectrum compared to an ATR-FTIR reference spectrum. In the experiment, from which the spectrum in Fig. 7b stems, the micelles were sampled onto a 210 μm long, 3 μm wide SRN string using a jet nebulizer. The particles were sampled at a flow velocity of 108 m/s for 5 min. The concentration of the micelle solution used for generating the aerosol was 0.2 mg/ml. The obtained NAM-IR spectrum is in good agreement with the reference spectrum, suggesting that NAM-IR is suitable for chemical analysis of small amounts of dispersed and complex ENMs.