We synthesized a kind of gold nanoparticle protected by a synthetic lipid (didodecyldimethylammonium bromide, DDAB). With the help of these gold nanoparticles, hemoglobin can exhibit a direct electron transfer (DET) reaction. The formal potential locates at -169 mV vs. Ag/AgCl. Spectral data indicated the hemoglobin on the electrode was not denatured. The lipid-protected gold nanoparticles were very stable (for at least 8 months). Their average diameter is 6.42 nm. It is the first time to use monolayer-protected nanoparticles to realize the direct electrochemistry of protein. © 2002 Elsevier Science B.V. All rights reserved.
Han, X., Cheng, W., Zhang, Z., Dong, S., & Wang, E. (2002). Direct electron transfer between hemoglobin and a glassy carbon electrode facilitated by lipid-protected gold nanoparticles. Biochimica et Biophysica Acta - Bioenergetics, 1556(2–3), 273–277. https://doi.org/10.1016/S0005-2728(02)00372-9