文献类型：期刊文献

英文题名：Dopamine facilitates Al2O3 film growth on polyethylene terephthalate by low-temperature plasma-enhanced atomic layer deposition

作者：Zhang, Zhen[1];Yan, Chi[1];Liu, Cui[1];Ye, Xiaojun[1];Yuan, Xiao[1];Li, Hongbo[1]

机构：[1]East China Univ Sci & Technol, Sch Mat Sci & Engn, Shanghai 200237, Peoples R China

年份：2022

卷号：33

期号：48

外文期刊名：NANOTECHNOLOGY

收录：;EI(收录号：20225113285377);WOS:【SCI-EXPANDED(收录号:WOS:000852838700001)】；

基金：This work was financed by the Science and Technology Commission of Shanghai Municipality, China [Grant No. 21DZ1205700]. The authors would like to thank Shiyanjia Lab (www.shiyanjia.com) for the XPS measurement.

语种：英文

外文关键词：dopamine; PEALD; PET; Al2O3; barrier layer

摘要：Polymeric materials, including polyethylene terephthalate (PET), are widely used in various fields because of their beneficial properties. Functional films are deposited on these materials through different approaches, such as plasma-enhanced atomic layer deposition (PEALD), to enhance their performance and prolong their life span. However, the inert and thermally fragile nature of most polymers hinders deposition. We developed a strategy for the PEALD of nanoscale Al2O3 films on PET substrates. First, a PET substrate is subjected to alkali treatment, which gives it basic hydrophilicity for the subsequent dopamine modification. After 24 h of dopamine deposition, the substrate shows adequate active sites (phenolic hydroxyl groups), which can chemisorb large amounts of precursor during the initial deposition. The island growth mode was observed during the PEALD processes. We analyzed the detailed chemical components of Al2O3 on alkali-treated PET and dopamine-modified PET. After 100 cycles of deposition, the Al2O3 films on both samples contained much hydrogen. Benefitting from the more active sites, we observed more continuous Al2O3 film on dopamine-modified PET, which exhibited excellent water vapor blocking performance. Our findings suggest that dopamine could act as a 'bridge' between polymers and PEALD functional films.