PMID- 21574632 OWN - NLM STAT- PubMed-not-MEDLINE DCOM- 20110929 LR - 20110615 IS - 1520-5126 (Electronic) IS - 0002-7863 (Linking) VI - 133 IP - 24 DP - 2011 Jun 22 TI - Layer-by-layer assembly and UV photoreduction of graphene-polyoxometalate composite films for electronics. PG - 9423-9 LID - 10.1021/ja201594k [doi] AB - Graphene oxide (GO) nanosheets and polyoxometalate clusters, H(3)PW(12)O(40) (PW), were co-assembled into multilayer films via electrostatic layer-by-layer assembly. Under UV irradiation, a photoreduction reaction took place in the films which converted GO to reduced GO (rGO) due to the photocatalytic activity of PW clusters. By this means, uniform and large-area composite films based on rGO were fabricated with precisely controlled thickness on various substrates such as quartz, silicon, and plastic supports. We further fabricated field effect transistors based on the composite films, which exhibited typical ambipolar features and good transport properties for both holes and electrons. The on/off ratios and the charge carrier mobilities of the transistors depend on the number of deposited layers and can be controlled easily. Furthermore, we used photomasks to produce conductive patterns of rGO domains on the films, which served as efficient microelectrodes for photodetector devices. FAU - Li, Haolong AU - Li H AD - Max Planck Institute for Polymer Research, Ackermannweg 10, D-55128 Mainz, Germany. FAU - Pang, Shuping AU - Pang S FAU - Wu, Si AU - Wu S FAU - Feng, Xinliang AU - Feng X FAU - Mullen, Klaus AU - Mullen K FAU - Bubeck, Christoph AU - Bubeck C LA - eng PT - Journal Article DEP - 20110525 PL - United States TA - J Am Chem Soc JT - Journal of the American Chemical Society JID - 7503056 EDAT- 2011/05/18 06:00 MHDA- 2011/05/18 06:01 CRDT- 2011/05/18 06:00 PHST- 2011/05/18 06:00 [entrez] PHST- 2011/05/18 06:00 [pubmed] PHST- 2011/05/18 06:01 [medline] AID - 10.1021/ja201594k [doi] PST - ppublish SO - J Am Chem Soc. 2011 Jun 22;133(24):9423-9. doi: 10.1021/ja201594k. Epub 2011 May 25.