Xinrui Du , Kong Gao , Dechun Li , Shixia Li , Feng Xia , Mei Wang , Maojin Yun , Li Dong
{"title":"表面工程的br端接Ti2C MXene在近红外区域具有优越的非线性光学特性,可用于超快光子应用","authors":"Xinrui Du , Kong Gao , Dechun Li , Shixia Li , Feng Xia , Mei Wang , Maojin Yun , Li Dong","doi":"10.1016/j.apsusc.2025.164077","DOIUrl":null,"url":null,"abstract":"<div><div>MXenes have recently garnered tremendous interest as emerging optoelectronic device materials due to their remarkable optical and electronic properties. However, the uncontrollable nature of surface termination seriously hinders the development of MXenes. Therefore, surface functionalization of MXenes is crucial to optimize their performance. In this study, Ti<sub>2</sub>C MXene with Br group modification (Ti<sub>2</sub>CBr<sub>2</sub>) was synthesized, and its nonlinear optical properties for near-infrared (NIR) ultrafast photonic applications were investigated. Theoretically, first-principles calculations revealed the optical and electronic properties of bare Ti<sub>2</sub>C and Ti<sub>2</sub>CT<sub>2</sub> (T = −Br, −Cl, –OH, −F, and −O). The results showed that Ti<sub>2</sub>CBr<sub>2</sub> exhibited a superior optical response in the NIR band compared to the other termination adsorptions. Experimentally, Ti<sub>2</sub>CBr<sub>2</sub> displayed large modulation depths of 48.25 % at 1 µm and 26.36 % at 1.5 µm, confirming its outstanding saturable absorption properties than many common nanomaterials. Furthermore, stable NIR mode-locking operation utilizing the Ti<sub>2</sub>CBr<sub>2</sub> SA was achieved at 1030 nm and 1563 nm, respectively. This work not only demonstrates the significant promise of Ti<sub>2</sub>CBr<sub>2</sub> in the field of ultrafast photonics but emphasizes the importance of surface functionalization modulation of MXene.</div></div>","PeriodicalId":247,"journal":{"name":"Applied Surface Science","volume":"711 ","pages":"Article 164077"},"PeriodicalIF":6.9000,"publicationDate":"2025-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Surface-engineered Br-terminated Ti2C MXene with superior nonlinear optical properties in the near-infrared region for ultrafast photonic applications\",\"authors\":\"Xinrui Du , Kong Gao , Dechun Li , Shixia Li , Feng Xia , Mei Wang , Maojin Yun , Li Dong\",\"doi\":\"10.1016/j.apsusc.2025.164077\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>MXenes have recently garnered tremendous interest as emerging optoelectronic device materials due to their remarkable optical and electronic properties. However, the uncontrollable nature of surface termination seriously hinders the development of MXenes. Therefore, surface functionalization of MXenes is crucial to optimize their performance. In this study, Ti<sub>2</sub>C MXene with Br group modification (Ti<sub>2</sub>CBr<sub>2</sub>) was synthesized, and its nonlinear optical properties for near-infrared (NIR) ultrafast photonic applications were investigated. Theoretically, first-principles calculations revealed the optical and electronic properties of bare Ti<sub>2</sub>C and Ti<sub>2</sub>CT<sub>2</sub> (T = −Br, −Cl, –OH, −F, and −O). The results showed that Ti<sub>2</sub>CBr<sub>2</sub> exhibited a superior optical response in the NIR band compared to the other termination adsorptions. Experimentally, Ti<sub>2</sub>CBr<sub>2</sub> displayed large modulation depths of 48.25 % at 1 µm and 26.36 % at 1.5 µm, confirming its outstanding saturable absorption properties than many common nanomaterials. Furthermore, stable NIR mode-locking operation utilizing the Ti<sub>2</sub>CBr<sub>2</sub> SA was achieved at 1030 nm and 1563 nm, respectively. This work not only demonstrates the significant promise of Ti<sub>2</sub>CBr<sub>2</sub> in the field of ultrafast photonics but emphasizes the importance of surface functionalization modulation of MXene.</div></div>\",\"PeriodicalId\":247,\"journal\":{\"name\":\"Applied Surface Science\",\"volume\":\"711 \",\"pages\":\"Article 164077\"},\"PeriodicalIF\":6.9000,\"publicationDate\":\"2025-07-17\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Applied Surface Science\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0169433225017921\",\"RegionNum\":2,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"CHEMISTRY, PHYSICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Applied Surface Science","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0169433225017921","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
Surface-engineered Br-terminated Ti2C MXene with superior nonlinear optical properties in the near-infrared region for ultrafast photonic applications
MXenes have recently garnered tremendous interest as emerging optoelectronic device materials due to their remarkable optical and electronic properties. However, the uncontrollable nature of surface termination seriously hinders the development of MXenes. Therefore, surface functionalization of MXenes is crucial to optimize their performance. In this study, Ti2C MXene with Br group modification (Ti2CBr2) was synthesized, and its nonlinear optical properties for near-infrared (NIR) ultrafast photonic applications were investigated. Theoretically, first-principles calculations revealed the optical and electronic properties of bare Ti2C and Ti2CT2 (T = −Br, −Cl, –OH, −F, and −O). The results showed that Ti2CBr2 exhibited a superior optical response in the NIR band compared to the other termination adsorptions. Experimentally, Ti2CBr2 displayed large modulation depths of 48.25 % at 1 µm and 26.36 % at 1.5 µm, confirming its outstanding saturable absorption properties than many common nanomaterials. Furthermore, stable NIR mode-locking operation utilizing the Ti2CBr2 SA was achieved at 1030 nm and 1563 nm, respectively. This work not only demonstrates the significant promise of Ti2CBr2 in the field of ultrafast photonics but emphasizes the importance of surface functionalization modulation of MXene.
期刊介绍:
Applied Surface Science covers topics contributing to a better understanding of surfaces, interfaces, nanostructures and their applications. The journal is concerned with scientific research on the atomic and molecular level of material properties determined with specific surface analytical techniques and/or computational methods, as well as the processing of such structures.