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The vertically aligned Carbon Nanotubes have proved to be one of the best material as an efficient field emitter. To further improve its efficiency as well as long-term use in practical devices, it is involuntary to reduce the quantum resistance originating due to interface between electrode and emitters and the entanglement of the CNTs in bundle texture. Thus incorporation of graphene at the bottom of CNT bundles via seamless carbonaceous interface can easily solve this bottleneck. In this work we have first time demonstrated growth and field emission (FE) properties of pure seamless graphene-CNTs heterostructures (SGCNTs) and pure seamless graphene-vertically patterned oriented CNTs heterostructures (SGVCNTs) on Si/SiO2 substrate in contrast to the bare CNT mats and Few-layer graphene (FLG) without any tedious post transfer process. It was observed that seamless SGVCNTs show better field emission performance in terms of higher current density (236mA/cm2), lowering turn-on field (0.45V/µm) and threshold field (1.931 V/µm @100mA/cm2), high current density (236 mA/cm2) and improved field enhancement factor (β~ 41315) which is tailored by~ 4 fold as compared to bare CNT mat. The significant improvement of the field emission performance of SGVCNTs is mainly attributed due to low resistive seamless covalent carbonaceous interface, higher number of emitter sites and patterned vertical orientation that leads to long-term stability of the field emitter with a minimum loss till 32 hours. This finding could provide an important solution of carbonaceous materials based field emitter for real phase device application.
This article was published in the following journal.
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An imaging technique using compounds labelled with short-lived positron-emitting radionuclides (such as carbon-11, nitrogen-13, oxygen-15 and fluorine-18) to measure cell metabolism. It has been useful in study of soft tissues such as CANCER; CARDIOVASCULAR SYSTEM; and brain. SINGLE-PHOTON EMISSION-COMPUTED TOMOGRAPHY is closely related to positron emission tomography, but uses isotopes with longer half-lives and resolution is lower.
The interdisciplinary science that studies evolutionary biology, including the origin and evolution of the major elements required for life, their processing in the interstellar medium and in protostellar systems. This field also includes the study of chemical evolution and the subsequent interactions between evolving biota and planetary evolution as well as the field of biology that deals with the study of extraterrestrial life.
Measurement of hearing based on the use of pure tones of various frequencies and intensities as auditory stimuli.
The mechanical property of material that determines its resistance to force. HARDNESS TESTS measure this property.
Field of study concerning MENTAL PROCESSES, LEARNING, and the brain regions associated with them.