%0 Journal Article %J Talanta %D 2020 %T Plasmonic and chiroplasmonic nanobiosensors based on gold nanoparticles %A Sharifi, M. %A Hosseinali, S.H. %A Alizadeh, R.H. %A Hasan, A. %A Attar, F. %A Salihi, A. %A Shekha, M.S. %A Amen, K.M. %A Aziz, F.M. %A Saboury, A.A. %A Akhtari, K. %A Taghizadeh, A. %A Hooshmand, N. %A El-Sayed, M. A. %A Falahati, M. %B Talanta %G eng %0 Journal Article %J Am. Chem. Soc. %D 2016 %T Photoexcited Surface Frustrated Lewis Pairs for Heterogeneous Photocatalytic Co2 Reduction %A Ghuman, K. K. %A Hoch, L. B. %A Szymanski, P. %A Loh, J. Y. %A Kherani, N. P. %A El-Sayed, M. A. %A Ozin, G. A. %A Singh, C. V. %B Am. Chem. Soc. %G eng %0 Journal Article %J Journal of Photochemistry and Photobiology a-Chemistry %D 2013 %T Plasmonic enhancement of photodynamic cancer therapy %A Hayden, S. C. %A Austin, Lauren %A Near, R. D. %A Ozturk, R. %A El-Sayed, M. A. %B Journal of Photochemistry and Photobiology a-Chemistry %V 269 %P 34-41 %8 Oct %@ 1010-6030 %G eng %M WOS:000324454900005 %R 10.1016/j.jphotochem.2013.06.004 %0 Journal Article %J Journal of Physical Chemistry C %D 2013 %T Properties of pi-Conjugated Fluorescence Polymer-Plasmonic Nanoparticles Hybrid Materials (vol 116, 13336, 2012) %A Mahmoud, M A %A Poncheri, A. J. %A El-Sayed, M. A. %A Bryant, J. %A Bunz, U. %B Journal of Physical Chemistry C %V 117 %P 4876-4876 %8 Mar %@ 1932-7447 %G eng %M WOS:000315707600060 %! J. Phys. Chem. C %R 10.1021/jp4006197 %0 Journal Article %J Journal of Physical Chemistry C %D 2012 %T Photoelectric Conversion Properties of Dye-Sensitized Solar Cells Using Dye-Dispersing Titania %A Nishikiori, H. %A Uesugi, Y. %A Setiawan, R. A. %A Fujii, T. %A Qian, W. %A El-Sayed, M. A. %X The time-resolved fluorescence and photoelectrochemical properties of dye-sensitized solar cells using crystalline titania electrodes coated with N3 dye-dispersing amorphous titania gel were investigated to clarify the influence of the dye titania interaction and electron transfer on their photoelectric conversion performance. The photocurrent quantum efficiency of the electrodes was remarkably increased by a steam treatment due to the crystallization and densification of the amorphous titania layer compared to that of the untreated electrode. The electron injection from the dye to the crystalline titania foundation via the steam-treated titania dispersing the dye was confirmed to be more efficient than that in the conventional electrodes. The dye-dispersing titania layer prevented interaction between the dye molecules and back electron transfer from the titania to the electrolyte. The charge separation and photoelectric conversion performance of the dye-sensitized solar cells were improved by forming the specific dye-dispersing titania layer. %B Journal of Physical Chemistry C %V 116 %P 4848-4854 %8 Feb %@ 1932-7447 %G eng %M WOS:000301156500062 %R 10.1021/jp2094388 %0 Journal Article %J Journal of Physical Chemistry C %D 2012 %T Properties of pi-Conjugated Fluorescence Polymer-Plasmonic Nanoparticles Hybrid Materials %A Mahmoud, M A %A Poncheri, A. J. %A El-Sayed, M. A. %X Recently, great interest has risen in studying and using hybrid material made by mixing polymeric materials with plasmonic nanoparticles. In the present work, the photophysical properties of two poly(p-phenyleneethynylene) fluorescent polymers, varying in chain length, were studied as a function of (1) pure polymer surface compression after deposition from a Langmuir-Blodgett trough onto a substrate and (2) deposition of a constant amount of polymer onto the surface of silver nanocube arrays of varying particle densities. The results are discussed in terms of the surface pressure and nanoparticle topography effects on conformation of the fluorescent polymer. It was found that the short polymer is much less affected by increased surface pressure, remaining isolated from interchain interaction. The long polymer exhibits signs of conjugation breaking, presumably due to compression of its longer, "tangled", structure. The two polymer chains in the nanoparticle/polymer series of experiments exhibited a blue-shift and a substantial narrowing of their emission spectra when deposited onto the lowest surface pressure nanoparticle sample. With increasing nanoparticle density, the spectra continue to blue-shift and narrow. This effect is presumably a combined effect of conformational changes that shift the emission to higher energy (blue-shift) and plasmonic effects that result in enhancement of primary emission of the polymer (emission from the 0-0 and 1-0 transitions), thus narrowing the emission. %B Journal of Physical Chemistry C %V 116 %P 13336-13342 %8 Jun %@ 1932-7447 %G eng %M WOS:000305444300042 %R 10.1021/jp303908e %0 Journal Article %J Journal of the American Chemical Society %D 2011 %T Plasmonic Imaging of Human Oral Cancer Cell Communities during Programmed Cell Death by Nuclear-Targeting Silver Nanoparticles %A Austin, Lauren %A Kang, B. %A Yen, C. W. %A El-Sayed, M. A. %X Plasmonic nanoparticles (NPs) have become a useful platform in Medicine for potential uses in disease diagnosis and treatment. Recently, it has been reported that plasmonic NPs conjugated to nuclear targeting peptides cause DNA damage and apoptotic populations in cancer cells. In the present work, we utilized the plasmonic scattering property and the ability of nuclear-targeted silver nanoparticles (NLS/RGD-AgNPs) to induce programmed cell death in order to image in real-time the behavior of human oral squamous carcinoma (HSC-3) cell communities during and after the induction of apoptosis. Plasmonic live-cell imaging revealed that HSC-3 cells behave as nonprofessional phagocytes. The induction of apoptosis in some cells led to attraction of and their subsequent engulfment by neighboring cells. Attraction to apoptotic cells resulted in clustering of the cellular community. Live-cell imaging also revealed that,. as the initial,concentration of NLS/RGD-AgNPs. increases, the rate of self killing increases and the degree of attraction and clustering decreases. These results are discussed in terms of the proposed mechanism of cells undergoing programmed cell death. %B Journal of the American Chemical Society %V 133 %P 17594-17597 %8 Nov %@ 0002-7863 %G eng %M WOS:000296312200020 %R 10.1021/ja207807t