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Phase structure control of Ni nanocrystals has been realized using a one‐pot chemical route. By adjusting the growth environment and growth dynamic process, pure cubic and hexagonal phase Ni nanocrystals can be obtained (see figure). Both the cubic and hexagonal phase Ni nanocrystals are shown to possess ferromagnetic properties, but the magnetic properties of the cubic phase are better than those of the hexagonal phase nanocrystals.

In this Letter we report a novel self-organized copper electrodeposition in an ultrathin layer of CuSO4 electrolyte. The macroscopic fingering branches of the deposit consist of long copper filaments covered with periodic corrugated nanostructures. The mechanism of the nanostructure formation is explored and the origin of the significant descent of the branching rate in electrodeposition is discussed. We suggest that this growth phenomenon provides deeper insights into the role of diffusion and migration on pattern formation in electrodeposition.

Electrical properties and non-volatile memory effect of the [Fe(HB(pz)3)2] spin crossover complex integrated in a microelectrode device Appl. Phys. Lett. 99, 053307 (2011); 10.1063/1.3616147 Observation of bistable resistance memory switching in CuO thin films Appl. Phys. Lett. 94, 102107 (2009); 10.1063/1.3098071Bistable electrical switching and write-once read-many-times memory effect in a donor-acceptor containing polyfluorene derivative and its carbon nanotube composites

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A new soluble donor-acceptor type poly(N-vinylcarbazole)-covalently functionalized graphene oxide (GO-PVK) has been synthesized by reaction of DDAT (S-1-dodecyl-S 0 -(a,a 0 -dimethyl-a 00 -aceticacid)trithiocarbonate)-PVK with GO-toluene-2,4diisocynate. The incorporation of sufficient amount of PVK chains makes the modified GO nanosheets readily dispersible in organic solvents. The resulting material exhibits an enhanced solubility of 10 mg/mL in organic solvents. Covalent grafting of PVK onto the edge and surface of GO nanosheets did not change the carbazole absorption in the ultraviolet region, but substantially reduced the absorption intensity of GO in the visible region. The intensity of the emission band of GO-PVK at 437 nm was a little bit quenched when com-pared with that of DDAT-PVK, suggesting intramolecular quenching from PVK to GO. Such intramolecular quenching process may involve energy or electron transfer between the excited singlet states of the PVK moiety and the GO moiety. The HOMO/LUMO values and the energy bandgap of GO-PVK experimentally estimated by the onset of the redox potentials are À5.60, À3.58, and 2.02 eV, respectively. V C 2010 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 48: 2642-2649, 2010

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A simple and efficient approach to endow the controllable multi-stimuli-responsive property for the supramolecular polymer was successfully developed by rationally introducing iodine into a novel naphthalimide-functionalized pillar[5]­arene-based supramolecular polymer (PNA⊃GBP). Interestingly, by introducing iodine into the supramolecular polymer PNA⊃GBP, the iodine could not only control the optical properties and self-assembly states of PNA⊃GBP via electronic donor–acceptor effect but also control the molecular recognition properties by competitive redox reaction. Benefiting from these excellent iodine controlled multiresponse properties, the PNA⊃GBP showed selective fluorescent response for cyanide, cysteine, and mercury in supramolecular polymer gels, water solutions, and living cells with high sensitivities. The supramolecular polymer PNA⊃GBP could act as a novel smart material for selective detection CN–, Hg2+, and l-Cys.