Front Cover: Near‐Infrared Photoluminescence from Small Copper, Silver, and Gold Nanoparticles (ChemNanoMat 3/2018)

Coinage metal nanoparticle emission: Near-infrared photoluminescence is observed for small-diameter (≈2–3 nm) copper and silver nanoparticles upon UV-vis excitation. Periodic trends are studied and reveal remarkably similar quantum yields, observed lifetimes, excitation pathways, and emission-peak features upon comparison to each other as well as to previously reported small-diameter gold nanoparticles (AuNPs), indicating that these processes may be universal across the coinage metals. The new particles and their emission properties are intriguing cost-effective alternatives to AuNPs in near-infrared-based applications such as biological imaging and sensing. More information can be found in the Communication by Jill E. Millstone et al. on page 265 in Issue 3, 2018 (DOI: 10.1002/cnma.201700382).