The possible use of dopamine, monitored spectroscopically, as a probe molecule for surface area measurements is investigated. Using high surface area carbon materials, including both graphene and graphene oxide (GO), the method is established as a complement or alternative to methylene blue or conventional N₂ (BET) adsorption. The molecular reorientation (flat to vertical) of dopamine on the graphene and GO surface provides a direct indication of the monolayer coverage and the rapid adsorption (within 10 min to saturation) offers high convenience. The smaller dopamine molecule size and less self-repulsion compared to methylene blue can be considered to yield a more closely-packed surface coverage on the materials of interest. Especially for materials with complex morphologies and internal structures, the dopamine adsorption will therefore lead to a more ‘correct’ measurement.

研究了用光谱法监测的多巴胺作为探针分子进行表面积测量的可能用途。使用包括石墨烯和氧化石墨烯（GO）在内的高表面积碳材料，该方法被确立为对亚甲基蓝或常规N ₂的补充或替代（BET）吸附。多巴胺在石墨烯和GO表面上的分子重新定向（从平直到垂直）可直接指示单层覆盖率，而快速吸附（在10分钟以内达到饱和）则提供了极大的便利。与亚甲基蓝相比，可以认为多巴胺分子的尺寸较小，自排斥性较小，可以在目标材料上产生更紧密堆积的表面覆盖。特别是对于具有复杂形貌和内部结构的材料，多巴胺吸附将因此导致更“正确”的测量。