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Molecular Structures of Poly(methyl methacrylate) at Different Buried Interfaces Revealed by Sum Frequency Generation Vibrational Spectroscopy

文献类型：期刊论文

作者Hu, Xintong1,2; Li, Bolin2; Xu, Zhaohui3; Ma, Yong-Hao3; Han, Xiaofeng3; Hu, Linhua4; Wang, Chu3; Wang, Ningfang1,2; Xu, Jinsheng1,2; Sheng, Zhigao2
刊名LANGMUIR
出版日期2024-09-24
卷号40
ISSN号0743-7463
DOI10.1021/acs.langmuir.4c03038
通讯作者Li, Bolin(lbl@hmfl.ac.cn) ; Sheng, Zhigao(zhigaosheng@hmfl.ac.cn) ; Lu, Xiaolin(lxl@seu.edu.cn)
英文摘要Silica or calcium fluoride (CaF2) substrate-supported poly(methyl methacrylate) (PMMA) thin films as insulating layers are commonly used in photoelectric/photovoltaic devices to improve the efficiency or stability of these devices. However, a comparative investigation of molecular structures at buried PMMA/silica and PMMA/CaF2 interfaces under thermal stimuli remains unexplored. In this study, we qualitatively and quantitatively revealed different molecular orderings and orientations of PMMA at two interfaces before and after annealing using sum frequency generation (SFG) vibrational spectroscopy. SFG vibrations were carefully assigned by using various deuterated PMMAs. SFG results indicated that, at the buried PMMA/silica interface, the side OCH3 groups were prone to lie down before annealing and tended to stand up after annealing. In contrast, the case was the opposite at the buried PMMA/CaF2 interface. The relative hydrophobicity/hydrophilicity of the two substrates and the developed hydrogen bonds upon annealing at the buried PMMA/silica interface, which is absent at the CaF2 surface, are believed to be the driving forces for different interfacial molecular structures. This study benefits the molecular-level understanding of the interfacial local structural relaxation of polymers at buried interfaces and the rational design of photoelectric/photovoltaic devices from the molecular level.
WOS关键词RAMAN-SPECTRA ; ORIENTATION ; DYNAMICS ; PROBE
资助项目National Key R&D Program of China[2023YFA1607703] ; National Natural Science Foundation of China[22203097] ; Collaborative Innovation Program of Hefei Science Center, CAS[2022HSC-CIP006] ; High Magnetic Field Laboratory of Anhui Province
WOS研究方向Chemistry ; Materials Science
语种英语
WOS记录号WOS:001319872900001
出版者AMER CHEMICAL SOC
资助机构National Key R&D Program of China ; National Natural Science Foundation of China ; Collaborative Innovation Program of Hefei Science Center, CAS ; High Magnetic Field Laboratory of Anhui Province
源URL[http://ir.hfcas.ac.cn:8080/handle/334002/135616]  
专题中国科学院合肥物质科学研究院
通讯作者Li, Bolin; Sheng, Zhigao; Lu, Xiaolin
作者单位1.Anhui Univ, Inst Phys Sci & Informat Technol, Hefei 230601, Peoples R China
2.Chinese Acad Sci, High Magnet Field Lab, HFIPS, Hefei 230031, Anhui, Peoples R China
3.Southeast Univ, Sch Biol Sci & Med Engn, State Key Lab Digital Med Engn, Nanjing 210096, Peoples R China
4.Chinese Acad Sci, Inst Solid State Phys, Hefei Inst Phys Sci, CAS,Key Lab Photovolta & Energy Conservat Mat, Hefei 230031, Anhui, Peoples R China
推荐引用方式
GB/T 7714		 Hu, Xintong,Li, Bolin,Xu, Zhaohui,et al. Molecular Structures of Poly(methyl methacrylate) at Different Buried Interfaces Revealed by Sum Frequency Generation Vibrational Spectroscopy[J]. LANGMUIR,2024,40.
APA Hu, Xintong.,Li, Bolin.,Xu, Zhaohui.,Ma, Yong-Hao.,Han, Xiaofeng.,...&Lu, Xiaolin.(2024).Molecular Structures of Poly(methyl methacrylate) at Different Buried Interfaces Revealed by Sum Frequency Generation Vibrational Spectroscopy.LANGMUIR,40.
MLA Hu, Xintong,et al."Molecular Structures of Poly(methyl methacrylate) at Different Buried Interfaces Revealed by Sum Frequency Generation Vibrational Spectroscopy".LANGMUIR 40(2024).

入库方式： OAI收割

来源：合肥物质科学研究院

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