Grafting PDMAEMA brushes onto graphene oxide for fabricating Ag nanosheet-assembled microspheres as SERS substrates

[Display omitted] •PDMAEMA brushes were grafted onto GO to form GO-g-PDMAEMA films.•Spontaneously forming Ag nanosheet-assembled microspheres on GO-g-PDMAEMA films.•GO-g-PDMAEMA/Ag films exhibited excellent SERS performances. In this work, poly(2-(dimethylamino)ethyl methacrylate) (PDMAEMA) brushes...

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Veröffentlicht in:Chemical physics letters 2023-02, Vol.813, p.140296, Article 140296
Hauptverfasser: Li, Xiyong, Li, Xuan, Wang, Wenqin
Format: Artikel
Sprache:eng
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Zusammenfassung:[Display omitted] •PDMAEMA brushes were grafted onto GO to form GO-g-PDMAEMA films.•Spontaneously forming Ag nanosheet-assembled microspheres on GO-g-PDMAEMA films.•GO-g-PDMAEMA/Ag films exhibited excellent SERS performances. In this work, poly(2-(dimethylamino)ethyl methacrylate) (PDMAEMA) brushes were grafted onto graphene oxide (GO) film by the self-initiated photografting and photopolymerization (SIPGP). The Ag nanosheet-assembled microspheres could spontaneously grow on the GO-g-PDMAEMA film in [Ag(NH3)2]OH solution. The shape and size could be facilely tuned by controlling reaction time and the concentration of [Ag(NH3)2]OH solution. The as-obtained GO-g-PDMAEMA/Ag film as a surface-enhanced Raman scattering (SERS) substrate exhibited excellent SERS performances and its limit of detection (LOD) for 4-ATP and thiram were up to 10-16 M and 10 ng/mL, respectively.
ISSN:0009-2614
1873-4448
DOI:10.1016/j.cplett.2023.140296