Application Notes      (click on link for full text)

Application Note 1: Protocol for Preparing a Dispersion of SWCNT for Fluorimetric Analysis

Prepare a 1% by weight solution of SDBS (sodium dodecylbenzenesulfonate) in DI H2O or in D2O...

 

Application Note 2: Assessing SWCNT Dispersion Quality

Dispersed semiconducting SWCNTs can emit near-IR fluorescence if they are free of growth defects, have not undergone sidewall chemical reactions, and are individually suspended rather than aggregated into bundles with other nanotubes. The measured fluorescence intensity from an SWCNT dispersion therefore depends not only on optical excitation power and nanotube concentration, but also on the sample’s “quality.”  To allow simple quantitative assessment of this quality, the NanoSpectralyzer automatically measures and reports the total (spectrally integrated) near-IR emission power...

 

Application Note 3: Determining (n, m) Compositions of SWCNT Samples

SWCNT samples almost always contain a number of (n,m) structural species, including semiconducting and metallic forms. The semiconducting SWCNT species present in a sample can be detected and identified by their fluorimetric signatures, which involve characteristic emission peaks in the near-IR and characteristic excitation peaks in the visible region....

 

Application Note 4: In Situ Profiling of DGU Centrifuge Tubes

One of the most promising new methods for purifying and sorting SWCNTs is density gradient ultracentrifugation (DGU)....

the NanoSpectralyzer can perform this analysis quickly, conveniently, and noninvasively in the intact centrifuged sample....