On 6-9th September 2021, an international scientific conference: 31st International Conference on Diamond and Carbon Materials was held, which was organized by the scientific journal Materials Today, publisher - Elsevier. The conference covered topics related to, among others, physical and chemical modification of carbon materials, energy harvesting and storage based on diamond, carbon nanotubes, graphene, etc. or topics related to carbon nanotubes. Our PhD student Wiktoria Tomal presented a flash talk at this conference on the topic: Carbon dots-based photoinitiating systems for 3D-VAT printing of functional light-sensitive hydrogel materials, where she presented her work results published within the journal Polymer Chemistry.