On-Chip Rayleigh Imaging and Spectroscopy of Carbon Nanotubes

Abstract

We report a novel on-chip Rayleigh imaging technique using wide-field laser illumination to measure optical scattering from individual single-walled carbon nanotubes (SWNTs) on a solid substrate with high spatial and spectral resolution. This method in conjunction with calibrated AFM measurements accurately measures the resonance energies and diameters for a large number of SWNTs in parallel. We apply this technique for fast mapping of key SWNT parameters, including the electronic-types and chiral indices for individual SWNTs, position and frequency of chirality-changing events, and intertube interactions in both bundled and distant SWNTs.

High-throughput optical imaging and spectroscopy of individual carbon nanotubes in devices

“…Currently nanotube research faces two outstanding challenges: (1) achieving chirality-controlled nanotube growth and (2) understanding chirality-dependent nanotube device physics. Addressing these challenges requires, respectively, high-throughput determination of nanotube chirality distribution on growth substrates and in-situ characterization of nanotube electronic structure in operating devices.Direct optical imaging and spectroscopy is well suited for these goals [8][9][10][11][12][13][14] , but its realization for single nanotubes on substrates or in devices has been an outstanding challenge due to small nanotube signal and unavoidable environment background. Here we demonstrate for the first time high-throughput real-time optical imaging and broadband spectroscopy of individual nanotubes in devices using a polarization-based microscopy combined with supercontinuum laser illumination.…”

“…Highthroughput and in-situ chirality and electronic structural characterization of individual carbon nanotubes is crucial for addressing these challenges. Optical imaging and spectroscopy has unparalleled throughput and specificity [8][9][10][11][12][13][14] , but its realization for single nanotubes on substrates or in devices has long been an outstanding challenge.…”

Multimodal optical microscopy in combination with gold nanorods for cancer cell imaging

“…Notably, the resolutions of SHG, TPL, and RLS were comparable to or even much higher than those reported in the previous researches. 23,38,43 For example, the resolution of SHG was 200 nm for the imaging of star-shaped golds, 38 the resolution of TPL was 300 nm for the imaging of blood vessels, 23 and the Rayleigh scattering displayed submicrometer resolution for the imaging of single-walled carbon nanotubes. 43 The high spatial resolution of this multimodal optical microscopy offered great promise for further applications in biological and biomedical research.…”

Sorting Semiconducting Single-Walled Carbon Nanotubes and Using Them as Random Network of Field-Effect Transistors

“…Recent papers have reported that a single nanotube existing in two or more chiral structures also makes it di±-cult to separate or sort single chiral species. 29 Fortunately, Hersam's group successfully used orthogonal iterative DGU to solve this problem. 30 According to their¯ndings, the ratio of sodium dodecyl sulfate (SDS) and sodium cholate (SC) is the key point in DGU process to achieve large density di®erences for SWCNTs species, especially for the similar diameter species.…”