Nano-infrared(nanoIR)probes play a crucial role as nano-mechanical sensors and antennas for light absorption and emission,and their testing performance is critically dependent on their optical properties and structura...Nano-infrared(nanoIR)probes play a crucial role as nano-mechanical sensors and antennas for light absorption and emission,and their testing performance is critically dependent on their optical properties and structural stability.Graphene-coated dielectric probes are highly attractive for enhancing light–matter interactions and integrating IR photonics,providing a broadband optical response and strong electromagnetic field.However,achieving continuous single-layer graphene growth on non-planar and non-single crystalline dielectrics is a significant challenge due to the low surface energy of the dielectric and the large difference in size between the probe tip,cantilever,and substrate.Herein,we present a novel method for the growth of high-quality and continuous graphene with good conductivity on non-planar and amorphous dielectric probe surfaces using manganese oxide powder-assisted short time heating chemical vapor deposition.The resulting graphene-coated dielectric probes exhibit an average IR reflectance of only 5%in the mid-IR band,significantly outperforming probes without continuous graphene coating.Such probes can not only effectively transduce the local photothermal sample expansion caused by the absorption of IR laser pulses,but also effectively scatter near-field light,which is 25 times stronger than the commercial metal-coated probes,and have advantages in the application of nanoIR sensing based on atomic force microscope-based infrared(AFM-IR)spectroscopy and infrared scattering scanning near field optical microscopy(IR s-SNOM)principles.Furthermore,our graphene growth method provides a solution for growing high-quality graphene on the surfaces of non-planar dielectric materials required for integrated circuits and other fields.展开更多
基金This work was financially supported by the National Natural Science Foundation of China(Nos.22002127,22275155,22272140,22202162,and 21904112)the Natural Science Foundation of Xiamen,China(No.3502Z20227008)+3 种基金the Fundamental Research Funds for the Central Universities(No.20720210016)the Ministry of Science and Technology of China,National Key Research and Development Program of China(No.2021YFA1201502)the Fundamental Research Funds for the Central Universities(No.20720220011)China Postdoctoral Science Foundation(No.2022M722648).
文摘Nano-infrared(nanoIR)probes play a crucial role as nano-mechanical sensors and antennas for light absorption and emission,and their testing performance is critically dependent on their optical properties and structural stability.Graphene-coated dielectric probes are highly attractive for enhancing light–matter interactions and integrating IR photonics,providing a broadband optical response and strong electromagnetic field.However,achieving continuous single-layer graphene growth on non-planar and non-single crystalline dielectrics is a significant challenge due to the low surface energy of the dielectric and the large difference in size between the probe tip,cantilever,and substrate.Herein,we present a novel method for the growth of high-quality and continuous graphene with good conductivity on non-planar and amorphous dielectric probe surfaces using manganese oxide powder-assisted short time heating chemical vapor deposition.The resulting graphene-coated dielectric probes exhibit an average IR reflectance of only 5%in the mid-IR band,significantly outperforming probes without continuous graphene coating.Such probes can not only effectively transduce the local photothermal sample expansion caused by the absorption of IR laser pulses,but also effectively scatter near-field light,which is 25 times stronger than the commercial metal-coated probes,and have advantages in the application of nanoIR sensing based on atomic force microscope-based infrared(AFM-IR)spectroscopy and infrared scattering scanning near field optical microscopy(IR s-SNOM)principles.Furthermore,our graphene growth method provides a solution for growing high-quality graphene on the surfaces of non-planar dielectric materials required for integrated circuits and other fields.
