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Nanotechnol."],"accepted":{"date-parts":[[2023,8,7]]},"abstract":"<jats:p>N-Heterocyclic carbenes (NHCs) are an emerging alternative to thiols for the formation of stable self-assembled monolayers (SAMs) on gold. We examined several different species that have been used to produce NHC-based monolayers on gold, namely 1,3-diisopropyl-5-nitrobenzimidazolium iodide, 1,3-diisopropyl-5-nitrobenzimidazolium hydrogen carbonate, bis(1,3-diisopropyl-5-nitrobenzimidazolium)gold(I) iodide, and 1,3-diisopropyl-5-nitrobenzimidazole-2-ylidene. Contrary to expectation, solutions containing the first two species in tetrahydrofuran and dichloromethane caused visible loss of gold from thin-film-coated glass slides. The use of toluene solutions of all species resulted in no apparent dissolution of gold. We present scanning electron micrographs and elemental imaging analyses by energy dispersive X-ray spectroscopy to examine the effect of solutions of each species on the gold film. This work highlights the risk of unwanted etching during some routes to NHC-based surface functionalization but also the potential for deliberate etching, with the outcome determined by choice of chemically synthesized organic species and solvent.<\/jats:p>","DOI":"10.3762\/bjnano.14.71","type":"journal-article","created":{"date-parts":[[2023,8,21]],"date-time":"2023-08-21T03:52:36Z","timestamp":1692589956000},"page":"865-871","source":"Crossref","is-referenced-by-count":3,"title":["N-Heterocyclic carbene-based gold etchants"],"prefix":"10.3762","volume":"14","author":[{"given":"Robert 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