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説明:

MXenes such as Ti₃C₂Tₓ and Ti₃CNTₓ are two‑dimensional materials whose surface terminations (Tₓ) passivate the otherwise reactive Ti surface. Tailoring this surface chemistry to anchor target molecules is a promising route to improve visible‑light‑to‑electricity conversion. Here, we report a covalent functionalization strategy that modifies the Tₓ terminations of Ti₃C₂Tₓ or Ti₃CNTₓ with alkyl amines, followed by coupling to a Zn‑porphyrin. This approach activates the optical response of MXenes without structural damage. Covalent attachment is confirmed by X‑ray photoelectron and infrared spectroscopy, while thermogravimetric analysis, transmission electron microscopy, and complementary techniques provide additional insight into structural and chemical changes. Spectroelectrochemical measurements reveal photoinduced carrier injection into the MXenes, consistent with enhanced conductivity under illumination. Photodetectors fabricated from these films exhibit responsivities of 1.4–15.0 A W⁻¹ and external quantum efficiencies of 1300–2830% across the visible range, comparable to established hybrid 2D nanomaterials such as MoS₂ and WS₂.

権利情報:

• Creative Commons BY Attribution 4.0 International
  

キーワード: Functionalization, spectroscopy

刊行年月日: 2025-08-03

出版者: Wiley

掲載誌:

• Small (ISSN: 16136810) vol. 21 issue. 38 e03895

研究助成金:

原稿種別: 出版者版 (Version of record)

MDR DOI:

公開URL: https://doi.org/10.1002/smll.202503895

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更新時刻: 2025-12-24 13:50:44 +0900

MDRでの公開時刻: 2025-12-24 16:20:29 +0900