Thin-film organic photodiodes for integrated on-chip chemiluminescence detection – application to antioxidant capacity screening Export

@article{citeulike:4842365, abstract = {We demonstrate that solution processed thin-film organic photodiodes (OPDs) can be used as compact and sensitive integrated detectors for antioxidant capacity screening. The OPDs were fabricated with blends of regioregular poly(3-hexylthiophene) (P3HT) and (6,6)-phenyl C 61 butyric-acid methyl-ester (PCBM). The devices had a broadband photoresponse from 350 nm to 650 nm with a peak responsivity of 0.25 A/W at 550 nm and a dark current density of 0.59 μA/cm 2 under 10 mV bias for a device area of 1 mm 2 . The signal rise and fall times of the detectors were 0.51 μs and 0.66 μs, respectively. The detectors were applied to an on-chip peroxyoxalate chemiluminescence (PO-CL) assay for antioxidant capacity determination. Antioxidant standards were injected into a stream of PO-CL reagents, resulting in a CL emission decrease that correlated with the antioxidant capacity. For the encountered CL signals the OPDs provided a comparable response to photomultiplier tubes (PMTs) commonly used in analytical applications. Antioxidant capacity screening results showed excellent consistency between the two detection methods. The compact and portable detection system is suited not only to low-cost in-the-field antioxidant capacity screening, but could have wider applications for chemiluminescence based diagnostic tests at the point-of-care.}, author = {Wang, Xuhua and Amatatongchai, Maliwan and Nacapricha, Duangjai and Hofmann, Oliver and de Mello, John C. and Bradley, Donal D. C. and de Mello, Andrew J.}, citeulike-article-id = {4842365}, citeulike-linkout-0 = {http://dx.doi.org/10.1016/j.snb.2009.04.068}, citeulike-linkout-1 = {http://linkinghub.elsevier.com/retrieve/pii/S0925400509003736}, day = {16}, doi = {10.1016/j.snb.2009.04.068}, issn = {09254005}, journal = {Sensors and Actuators B: Chemical}, keywords = {important, loc, loc-optic, loc-organic, loc-plastic, print}, month = {July}, number = {2}, pages = {643--648}, posted-at = {2009-10-30 14:37:50}, priority = {2}, title = {Thin-film organic photodiodes for integrated on-chip chemiluminescence detection – application to antioxidant capacity screening}, url = {http://dx.doi.org/10.1016/j.snb.2009.04.068}, volume = {140}, year = {2009} }

TY - JOUR ID - citeulike:4842365 L3 - citeulike-article-id:4842365 N2 - We demonstrate that solution processed thin-film organic photodiodes (OPDs) can be used as compact and sensitive integrated detectors for antioxidant capacity screening. The OPDs were fabricated with blends of regioregular poly(3-hexylthiophene) (P3HT) and (6,6)-phenyl C 61 butyric-acid methyl-ester (PCBM). The devices had a broadband photoresponse from 350 nm to 650 nm with a peak responsivity of 0.25 A/W at 550 nm and a dark current density of 0.59 μA/cm 2 under 10 mV bias for a device area of 1 mm 2 . The signal rise and fall times of the detectors were 0.51 μs and 0.66 μs, respectively. The detectors were applied to an on-chip peroxyoxalate chemiluminescence (PO-CL) assay for antioxidant capacity determination. Antioxidant standards were injected into a stream of PO-CL reagents, resulting in a CL emission decrease that correlated with the antioxidant capacity. For the encountered CL signals the OPDs provided a comparable response to photomultiplier tubes (PMTs) commonly used in analytical applications. Antioxidant capacity screening results showed excellent consistency between the two detection methods. The compact and portable detection system is suited not only to low-cost in-the-field antioxidant capacity screening, but could have wider applications for chemiluminescence based diagnostic tests at the point-of-care. IS - 2 JF - Sensors and Actuators B: Chemical SN - 09254005 EP - 648 TI - Thin-film organic photodiodes for integrated on-chip chemiluminescence detection – application to antioxidant capacity screening VL - 140 SP - 643 KW - important KW - loc KW - loc-optic KW - loc-organic KW - loc-plastic KW - print AU - Wang, Xuhua AU - Amatatongchai, Maliwan AU - Nacapricha, Duangjai AU - Hofmann, Oliver AU - de Mello, John AU - Bradley, Donal AU - de Mello, Andrew PY - 2009/07/16/ UR - http://dx.doi.org/10.1016/j.snb.2009.04.068 ER -