H. Zhou, X. Li, A. Lemoff, B. Zhang, и B. Yan. Analyst, (2010)They prepared gold NPs with different molar ratios of two similar thiolate ligands. NPs were dried and pressed into KBr pellets for FTIR analysis; changes in the spectra were correlated with the molar ratio of the two ligands. The ratios were confirmed by cleaving off the ligands and analyzing them by HPLC (MS & UV/vis detection). Supporting info gives synthesis conditions. The authors are located at St Jude's in Memphis, as well as in China..
X. Zhu, L. Zhu, Z. Duan, R. Qi, Y. Li, и Y. Lang. Journal Of Environmental Science And Health Part A-Toxic/Hazardous Substances & Environmental Engineering, (2008)