| Low-dimensional organic/inorganic hybrid nanomaterials have received a lot of attention due to the both properties of organic nanomaterials and inorganic nanomaterials and the unique properties produced by the organic/inorganic heterojunctional interface at the same time. This thesis presents the studies on design, synthesis, and properties of low-dimensional organic/inorganic hybrid nanomaterials, and focuses on two parts, one is how to control high-index facets of 2D organic nanoplates by inorganic semiconductor nanocrystals induced self-assembly and the other is how to control the size and the structure of the heterojunctional interface of organic/inorganic heterojunction nanowires with high-performance.1. A new method is used to synthesize 2D organic nanoplate with controllable morphology: The H2-5,10,15,20-tetra(4-(methoxycarbonyl)phenyl)porphyrin(TCPP) was synthesized and TCPP was transformed to TCPP-(COONH4)4 which can be dissolved in water by NH3?H2O. Then TCPP-(COONH4)4 was mixed with Co(NO3)2, Cu(NO3)2, Zn(NO3)2, Cd(NO3)2 in water at 80°C. The selected nitrates are that whose metal ion can form the "paddle-wheel" structure with carboxylate ion. The Co TCPP nanobelts, Cu TCPP nanosheets, Zn TCPP nanobelts, Cd TCPP nanosheets were synthesized after 16 h. Zn TCPP chosen as the precursor and thiourea chosen as sulfur source were heated together in the mixed solvent of CH3 CN and H2 O, the Zn S nanoparticles were produced with the hydrolysis of thiourea. Zn S nanoparticles were absorbed on the special facet of TCPP aggregations after HCl was added to the mixture. By controlling the concentrations of HCl, the competitions of the H-bands and ?-? interactions were controlled, and as a result the nanostructures of the TCPP nanoplates with high-index facets by inorganic semiconductor nanocrystals induced self-assembly were implemented successfully.2. In situ electrically induced self-assembly technology combined with the electrochemical deposition method is proposed: One-dimensional(1D) GD nanowires were synthesized through in situ polymerizing technology, using an AAO template. The Cu S nanoshells were grown around the GD nanowires by in situ electrically induced self-assembly technology combined with the electrochemical deposition method. The length of the Cu S nanoshell increases with prolonging the time of electrochemical deposition. The GD/Cu S core-shell heterojunction nanowires with controllable length were fabricated and the area of the junction interface of the GD/Cu S core-shell heterojunction nanowire in a large range can be controlled, and the rectification ratios decrease as the heterojunction areas increase.3. Three different morphologies of poly[thieno[3,2-b]thiophene](PTTh) nanowires or nanotubes were synthesized within the pores of anodized aluminum oxide(AAO) templates using electrochemical polymerization technology at different polymerization potentials and monomer concentrations. Then Cd S nanowires were fabricated with the existed PTTh nanowires using electrochemical deposition technology and three PTTh/Cd S organic/inorganic heterojunction nanowires with different nanostructures were prepared. The current-voltage(I-V) characteristic of a single PTTh/Cd S organic/inorganic heterojunction nanowire was measured. The result is that the rectification ratio of the heterojunction nanowire decreases with the increase of the junction area.4. Poly[5,10,15,20-tetra(4-ethynylphenyl)porphyrin]diyne(PTEPP) nanotubes were synthesized by in situ cross-coupling reaction, using an AAO template. The Cd S nanoshells were grown both the internal and the external of the PTEPP nanotubes by in situ electrically induced self-assembly technology combined with the electrochemical deposition method. The PTEPP/Cd S core-shell organic/inorganic heterojunction nanowire exhibits an obvious photoresponse behavior, which is increased by 12 times. |
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