We report the use of chemically-functionalized water soluble single-walled carbon nanotube (SWNT) graft copolymers for modulation of outgrowth of neuronal processes. The graft copolymers were prepared by the functionalization of SWNTs with poly-m-aminobenzene sulphonic acid and polyethylene glycol. When added to the culturing medium, these functionalized water soluble SWNTs were able to increase the length of various neuronal processes.
Multiscale carbon
supraparticles (SPs) are synthesized by soft-templating
lignin nano- and microbeads bound with cellulose nanofibrils (CNFs).
The interparticle connectivity and nanoscale network in the SPs are
studied after oxidative thermostabilization of the lignin/CNF constructs.
The carbon SPs are formed by controlled sintering during carbonization
and develop high mechanical strength (58 N·mm–3) and surface area (1152 m2·g–1). Given their features, the carbon SPs offer hierarchical access
to adsorption sites that are well suited for CO2 capture
(77 mg CO2·g–1), while presenting
a relatively low pressure drop (∼33 kPa·m–1 calculated for a packed fixed-bed column). The introduced lignin-derived
SPs address the limitations associated with mass transport (diffusion
of adsorbates within channels) and kinetics of systems that are otherwise
based on nanoparticles. Moreover, the carbon SPs do not require doping
with heteroatoms (as tested for N) for effective CO2 uptake
(at 1 bar CO2 and 40 °C) and are suitable for regeneration,
following multiple adsorption/desorption cycles. Overall, we demonstrate
porous SP carbon systems of low cost (precursor, fabrication, and
processing) and superior activity (gas sorption and capture).
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