Nanosheets and 2D-nanonetworks by mutually assisted self-assembly of fullerene clusters and DNA three-way junctions

Self-assembly of F-An nanoclusters with 3WJ-DNA and 3WJ-OH offers nanosheets and entangled 2D-nanonetworks, respectively. 3WJ-OH/F-An in the presence of AgNCs shows enhanced fluorescence (∼40%) due to its stabilization in the 2D-nanonetworks.

Increased elasticity and damping capacity of diamond-like carbon coatings by immobilized C60 fullerene clusters

The elasticity, damping capacity and as a result durability of diamond-like carbon (DLC) coatings in contact situations were significantly improved through introducing an interlayer of immobilized C60 fullerene clusters.

MODIFICATION OF SURFACE OF DOUBLE WALL CARBON NANO TUBES BY FULLERENE C60

The composite samples based on double-wall carbon nano tubes and fullerenes followed by laser treatment were prepared. XPS confirmed existence of essential contact between two components of the composite. The differential charging effect disappears after laser processing, which induces photopolymerization of fullerene clusters. The TEM showed close-packed continuous coating of cross-linked C60 clusters formed on the surface of nano tubes after laser irradiation.

Chirality and spatially pre-organized multi-porphyrinoids

We report herein that chiral and enantiopure compounds such nucleosides and peptides can pre-organize multi-porphyrinic systems and influence their properties. The first example given concerns star-shaped mutli-porphyrins with chiral and enantiopure nucleosidic linkers. If the configuration is indeed a star-shaped nanomolecule, it appears that the induced conformation is nothing as expected. The four peripheral Zn(II) porphyrins collapse over the free-base central one, inducing totally different photo-physical properties. Despite a minor expected light energy harvesting behavior, the principal capability of this system is to quench the collected light energy and convert it from radiative to non-radiative de-activation. The second example concerns polypeptides with pendant porphyrins. The peptidic backbone confers to the systems, after a certain degree of oligomerization, a 3[Formula: see text] right handed helical conformation which induces cavities within the multi-porphyrinc architecture, ready to welcome guests and render, for example, the complexation of C[Formula: see text] much easier. We thus have constructed novel organic photovoltaic systems using supramolecular complexes of porphyrin–peptide oligomers with fullerene clusters. The composite cluster OTE/SnO[Formula: see text] electrode prepared with (P(ZnP)[Formula: see text] C[Formula: see text], exhibits an impressive incident photon-to-photocurrent efficiency (IPCE) with values reaching as high as 56%. The power conversion efficiency of the (P(H[Formula: see text]P)[Formula: see text] C[Formula: see text] modified electrode reaches 1.6%, which is 40 times higher than the value (0.043%) of the porphyrin monomer (P(H[Formula: see text]P)[Formula: see text] [Formula: see text] C[Formula: see text] modified electrode. Thus, the organization approach between porphyrins and fullerenes with polypeptide structures is promising, and may make it possible to further improve the light energy conversion properties by using a larger number of porphyrins in a polypeptide unit.

Chiral self-assembly of fullerene clusters on CT-DNA templates

Fullerene nanoclusters with a unique cluster size (3–5 nm) interact with DNA forming chiral assemblies, thus perturbing the highly networked structure of CT-DNA.