Triple-enhanced Raman scattering sensors from flexible MXene/Au nanocubes platform via attenuating the coffee ring effect.

Developing substrates that combine sensitivity and signal stability is a major challenge in surface enhanced Raman scattering (SERS) research. Herein, we present a flexible triple-enhanced Raman Scattering MXene/Au nanocubes (AuNCs) sensor fabricated by selective filtration of Ti3C2Tx MXene/AuNCs hybrid on the Ti3C2Tx MXene membrane and subsequent treatment with 1H,1H,2H,2H-perfluoro-octyltriethoxysilane (FOTS). The resultant superhydrophobic MXene/AuNCs-FOTS membrane not only provides the SERS substrate with environmental stability, but also imparts analyte enrichment to enhance the sensitivity (LOD = 1 × 10-14 M) and reliability (RSD = 6.41%) for Rhodamine 6G (R6G) molecules owing to the attenuation of the coffee ring effect. Moreover, the triple enhancement mechanism of combining plasmonic coupling enhancement from plasmonic coupling (EM) of nearby AuNCs at lateral and longitudinal direction of MXene/AuNCs-FOTS membrane, charge transfer (CT) from Ti3C2Tx MXene and target molecules and analyte enrichment function provides the substrate with excellent SERS performance (EF = 3.19 × 109), and allows efficient quantification of biomarkers in urine. This work could provide new insights into MXenes as building blocks for high-performance substrates and fill existing gaps in SERS techniques.

Liu X ，Dang A ，Li T ，Lee TC ，Sun Y ，Liu Y ，Ye F ，Ma S ，Yang Y ，Deng W ... -  《-》

Plasmonic Coupling of Au Nanoclusters on a Flexible MXene/Graphene Oxide Fiber for Ultrasensitive SERS Sensing.

Liu X ，Dang A ，Li T ，Sun Y ，Lee TC ，Deng W ，Wu S ，Zada A ，Zhao T ，Li H ... -  《ACS Sensors》

Flexible nanohybrid substrates utilizing gold nanocubes/nano mica platelets with 3D lightning-rod effect for highly efficient bacterial biosensors based on surface-enhanced Raman scattering.

Chen YF ，Lu MC ，Lee CJ ，Chiu CW ... -  《-》

Electrostatic Self-Assembly of Ti(3)C(2)T(x) MXene and Gold Nanorods as an Efficient Surface-Enhanced Raman Scattering Platform for Reliable and High-Sensitivity Determination of Organic Pollutants.

Xie H ，Li P ，Shao J ，Huang H ，Chen Y ，Jiang Z ，Chu PK ，Yu XF ... -  《ACS Sensors》

SERS Performance of Ti(3)C(2)T(x) MXene-Based Substrates Correlates with Surface Morphology.

Salehtash F ，Annušová A ，Stepura A ，Soyka Y ，Halahovets Y ，Hofbauerová M ，Mičušík M ，Kotlár M ，Nádaždy P ，Albrycht P ，Šiffalovič P ，Jergel M ，Omastová M ，Majková E ... -  《Materials》