AbstractThe influence of density of amino groups, nanoparticles dimension and pH on the interaction between end-functionalized polymers and nanoparticles was extensively investigated in this study. PS–NH2 and H2N–PS–NH2 were prepared using reversible addition–fragmentation chain transfer polymerization and atom transfer radical polymerization. Zero-dimensional carbon dots with sulfonate groups, one-dimensional cellulose nanocrystals with sulfate groups and two-dimensional graphene with sulfonate groups in the aqueous phase were added into the toluene phase containing the aminated PS. The results indicate that aminated PS exhibited the strongest interfacial activity after compounding with sulfonated nanoparticles at a pH of 3. PS ended with two amino groups performed better in reducing the water/toluene interfacial tension than PS ended with only one amino group. The dimension of sulfonated nanoparticles also contributed significantly to the reduction in the water/toluene interfacial tension. The minimal interfacial tension was 4.49 mN/m after compounding PS–NH2 with sulfonated zero-dimensional carbon dots.
We report on a Cu(II) catalyzed process for the production of cysteine based chiral carbon dots, the process does not require any thermal treatment and the carbon dots formation is...
We describe a
systematic investigation of carbon dots (C-dots) assemblies fabricated at the
liquid/air interface because of the surface tension gradient. This gradient is
originally created by capillary action and increased by addition of sodium
dodecyl sulfate (SDS) surfactant or
1-palmitoyl-2-oleoyl-sn-glycero-3-phosphocholine (POPC) phospholipid to the
surface of C-dots aqueous mixture. The
arrangement of carbon dots in liquid bulk phase (before self-assembly) and at
the surface region (after self-assembly) was examined by TEM microscopy. The
presence of SDS surfactant and POPC phospholipid at the air/water interface
induced the C-dots compression. In addition, molecular dynamics simulation was conducted
to obtain the structure of C-dots at liquid/vapor interface. The orientation of
C-dots is evaluated quantitatively at water/vapor surface by using bivariate
analysis.
The N-modified carbon dots/graphitic carbon nitride (NCDs/g-C3N4) aerogel was successfully prepared by simple electrostatic self-assembly of NCDs and g-C3N4 nanosheets without any harmful solvents or cross-linking agents. The prepared aerogel...
Chiral carbon dots, prepared from the unnatural d-enantiomer of cysteine, inhibit the growth of Escherichia coli ATCC 25922 and MG1655 at a lower concentration than l-carbon dots, prepared from the l-enantiomer.
Chiral Self-Assembly of Porphyrins Induced by Chiral Carbon Dots
