The fabrication of nanoscale hybrid materials by modifying surfaces with photoluminescent nanoparticles is important for the development of technologically advanced functional surfaces and interfaces. In this work, photoluminescent carbon dots (CDs) were grafted onto SiO₂ substrate using a simple one-step thermal annealing method. Two-step methods based on silane chemistry using amidation reaction between CDs and amine-terminated surfaces, and ring-opening reaction between CDs and glycidyl-terminated surfaces, were also developed. The thermal annealing method resulted in a complete monolayer of CDs on SiO₂ substrate. The successful grafting by different methods also confirmed that the surface of CDs consisted of –COOH, –NH₂, and –OH groups, which have been a subject of debate. The CD-grafted layer was then applied for metal ion sensing and adsorption, showing selective adsorption of Cu²⁺ with a high adsorption capacity of 2.4 × 10⁻⁵ mg·cm⁻². Additionally, functionalization of the CD-grafted layer was also demonstrated to show its tailoring ability.

通过用光致发光纳米粒子修饰表面来制造纳米级杂化材料对于开发技术先进的功能性表面和界面非常重要。在这项工作中，使用简单的一步式热退火方法将光致发光碳点（CD）接枝到SiO ₂衬底上。还开发了基于硅烷化学的两步法，该方法使用了CD与胺端基表面之间的酰胺化反应，以及CD与缩水甘油基端表面之间的开环反应。热退火方法在SiO ₂衬底上形成了完整的CD单层。通过不同方法成功接枝也证实了CD的表面由–COOH，–NH _2组成以及–OH团体，这些都是争论的话题。然后将CD接枝层应用于金属离子感测和吸附，表现出对Cu ^2+的选择性吸附，其具有2.4×10 ^-5 mg·cm ^-2的高吸附容量。另外，还证明了CD嫁接层的功能化显示了其定制能力。