Graphene Oxide/Hexylamine Superlattice Field‐Effect Biochemical Sensors. (25th February 2021)

• Record Type: Journal Article
• Authors: Huang, Yingqi; Yin, Shujia; Huang, Yujia; Zhang, Xiaoyan; Zhang, Weizhe; Jiang, Guangya; Zhu, Hongwei; Wan, Chunlei; Fu, Wangyang
• Is Part Of: Advanced functional materials. Volume 31:Number 23(2021)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2021-02-25
• Subjects: biochemical sensors -- field‐effect transistors -- flexible 2D materials -- graphene papers -- layer‐by‐layer superlattices; Materials -- Periodicals; Chemical vapor deposition -- Periodicals; 620.11
• DOI: 10.1002/adfm.202010563
• Languages: English
• ISSNs: 1616-301X

Abstract

Abstract: The bulky assembly of 2D materials is highly desired for macroscopic applications, but it is still challenging to access the exceptional properties of 2D materials owing to their spontaneous aggregation. Here, to facilitate the access of the field‐effect sensing abilities of semiconducting 2D materials in bulk quantities, 3D hybrid superlattices of alternating graphene oxide (GO) and hexylamine molecular layers are constructed. Strikingly, the fabricated flexible GO/hexylamine superlattice exhibits a "V"‐shaped ambipolar field‐effect transfer characteristic under electrolyte gating, with exceptional sensing ability to pH value and DNA molecules in buffer solutions. In contrast, GO paper prepared by annealing the hybrid superlattices exhibits neither field‐effect nor sensing responses to various analytes, highlighting the essential role that hexylamine plays in modulating the GO/hexylamine superlattice to enable a wider interlayer spacing for biomolecules transportation in the internal graphene layer. These achievements, along with stable electrical and sensing performance under mechanical stress of the 3D hybrid superlattices, highlight the unique potential of flexible graphene 3D hybrid superlattices for biochemical applications by overcoming multilayer aggregation. Abstract : Superlattices of alternating graphene oxide and hexylamine molecular layers are constructed. Owing to a wider interlayer spacing for biomolecular transportation, such graphene oxide/hexylamine superlattices exhibit an exceptional field‐effect sensing ability to pH values and DNA molecules in buffer solutions, highlighting the unique potential of graphene 3D hybrid superlattices for biochemical applications by overcoming multilayer aggregation.