- The Cover shows new gold nanoparticles mimicking wool balls, which serve as excellent catalysts for methanol oxidation and nitrophenol reduction. In their Full Paper, X. Yin et al. describe the synthesis of nano “wool balls” through simple, spontaneous crystallization and reduction of gold thiocyanate [Au (SCN) 4 À] in water, without co-addition of nucleating seeds, templating compounds or reducing agents. The Au nano “wool balls” are highly uniform in size and display remarkable nanoribbon surface morphology. Their unique corrugated morphology and high surface area likely shape their catalytic performance. More information can be found in the Full Paper by X. Yin et al.(DOI: 10.1002/cctc. 201700459).