All Outputs (54)

Probing the molecular orientation of a single conjugated polymer via nano-gap SERS (2019)
Journal Article
Marshall, A. R. L., Roberts, M., Gierschner, J., Bouillard, J. S. G., & Adawi, A. M. (2019). Probing the molecular orientation of a single conjugated polymer via nano-gap SERS. ACS Applied Polymer Materials, 1(5), 1175-1180. https://doi.org/10.1021/acsapm.9b00180

Determining the molecular orientation at the single molecule level is of key importance for a wide range of applications ranging from molecular electronic devices to biomedical applications. In this work surface-enhanced Raman scattering (SERS) was u... Read More about Probing the molecular orientation of a single conjugated polymer via nano-gap SERS.

Synthesis of super bright indium phosphide colloidal quantum dots through thermal diffusion (2019)
Journal Article
Clarke, M. T., Viscomi, F. N., Chamberlain, T. W., Hondow, N., Adawi, A. M., Sturge, J., Erwin, S. C., Bouillard, J. S. G., Tamang, S., & Stasiuk, G. J. (2019). Synthesis of super bright indium phosphide colloidal quantum dots through thermal diffusion. Communications Chemistry, 2(1), Article 36. https://doi.org/10.1038/s42004-019-0138-z

© 2019, The Author(s). Indium phosphide based quantum dots have emerged in recent years as alternatives to traditional heavy metal (cadmium, lead) based materials suitable for biomedical application due to their non-toxic nature. The major barrier to... Read More about Synthesis of super bright indium phosphide colloidal quantum dots through thermal diffusion.

A label-free aptamer-based nanogap capacitive biosensor with greatly diminished electrode polarization effects (2019)
Journal Article
Ghobaei Namhil, Z., Kemp, C., Verrelli, E., Iles, A., Pamme, N., Adawi, A. M., & Kemp, N. (2019). A label-free aptamer-based nanogap capacitive biosensor with greatly diminished electrode polarization effects. Physical chemistry chemical physics : PCCP, 21(2), 681-691. https://doi.org/10.1039/c8cp05510f

A significant impediment to the use of impedance spectroscopy in bio-sensing is the electrode polarization effect that arises from the movement of free ions to the electrode-solution interface, forming an electrical double layer (EDL). The EDL screen... Read More about A label-free aptamer-based nanogap capacitive biosensor with greatly diminished electrode polarization effects.

Metaparticles: Dressing nano-objects with a hyperbolic coating (2018)
Journal Article
Wang, P., Krasavin, A. V., Viscomi, F. N., Adawi, A. M., Bouillard, J.-S. G., Zhang, L., Roth, D. J., Tong, L., & Zayats, A. V. (2018). Metaparticles: Dressing nano-objects with a hyperbolic coating. Laser and Photonics Reviews, 12(11), 1800179. https://doi.org/10.1002/lpor.201800179

The ability to engineer the optical response of a plasmonic nano‐object is highly desired to achieve better control over light–matter interactions. Due to the sensitivity of plasmon resonances to the surrounding media, isotropic dielectric coating is... Read More about Metaparticles: Dressing nano-objects with a hyperbolic coating.

From photoinduced to dark cytotoxicity via an octahedral cluster hydrolysis (2018)
Journal Article
Svezhentseva, E. V., Vorotnikov, Y. A., Solovieva, A. O., Pozmogova, T. N., Eltsov, I. V., Ivanov, A. A., Evtushok, D. V., Miroshnichenko, S. M., Yanshole, V. V., Eling, C. J., Adawi, A. M., Bouillard, J. S. G., Kuratieva, N. V., Fufaeva, M. S., Shestopalova, L. V., Mironov, Y. V., Efremova, O. A., & Shestopalov, M. A. (2018). From photoinduced to dark cytotoxicity via an octahedral cluster hydrolysis. Chemistry: a European journal, 24(68), 17915-17920. https://doi.org/10.1002/chem.201804663

Octahedral molybdenum and tungsten clusters have potential biological applications in photodynamic therapy and bioimaging. However, poor solubility and hydrolysis stability of these compounds hinder their application. The first water-soluble photolum... Read More about From photoinduced to dark cytotoxicity via an octahedral cluster hydrolysis.

Density functional theory for the crystallization of two-dimensional dipolar colloidal alloys (2018)
Journal Article
Somerville, W. R., Stokes, J. L., Adawi, A. M., Horozov, T. S., Archer, A. J., & Buzza, D. M. (2018). Density functional theory for the crystallization of two-dimensional dipolar colloidal alloys. Journal of Physics: Condensed Matter, 30(40), https://doi.org/10.1088/1361-648X/aaddc9

Two-dimensional mixtures of dipolar colloidal particles with different dipole moments exhibit extremely rich self-assembly behaviour and are relevant to a wide range of experimental systems, including charged and super-paramagnetic colloids at liquid... Read More about Density functional theory for the crystallization of two-dimensional dipolar colloidal alloys.

Conjugated, rod-like viologen oligomers: Correlation of oligomer length with conductivity and photoconductivity (2018)
Journal Article
Chen, L., Vivier, E., Eling, C. J., Babra, T. S., Bouillard, J. S. G., Adawi, A. M., Benoit, D. M., Hartl, F., Colquhoun, H. M., Efremova, O. A., & Greenland, B. W. (2018). Conjugated, rod-like viologen oligomers: Correlation of oligomer length with conductivity and photoconductivity. Synthetic Metals, 241, 31-38. https://doi.org/10.1016/j.synthmet.2018.03.019

© 2018 An iterative synthesis has been used to produce conjugated, monodisperse, viologen-based aromatic oligomers containing up to 12 aromatic/heterocyclic rings. The methoxy-substituted oligomers were soluble in common organic solvents and could be... Read More about Conjugated, rod-like viologen oligomers: Correlation of oligomer length with conductivity and photoconductivity.

Nanogap capacitive biosensor for label-free aptamer-based protein detection (2018)
Thesis
Namhil, Z. G. (2018). Nanogap capacitive biosensor for label-free aptamer-based protein detection. (Thesis). University of Hull. Retrieved from https://hull-repository.worktribe.com/output/4220514

Recent advances in nanotechnology offer a new platform for the label free detection of biomolecules at ultra-low concentrations. Nano biosensors are emerging as a powerful method of improving device performance whilst minimizing device size, cost and... Read More about Nanogap capacitive biosensor for label-free aptamer-based protein detection.

Crossover between liquid-like and gas-like behaviour in CH₄ at 400 K (2017)
Journal Article
Smith, D., Hakeem, M. A., Parisiades, P., Maynard-Casely, H. E., Foster, D., Eden, D., Bull, D. J., Marshall, A. R., Adawi, A. M., Howie, R., Sapelkin, A., Brazhkin, V. V., & Proctor, J. E. (2017). Crossover between liquid-like and gas-like behaviour in CH₄ at 400 K. Physical Review E, 96(5), Article 052113. https://doi.org/10.1103/PhysRevE.96.052113

We report experimental evidence for a crossover between a liquid-like state and a gas-like state in fluid methane (CH₄). This crossover is observed in all of our experiments, up to 397 K temperature; 2.1 times the critical temperature of methane. The... Read More about Crossover between liquid-like and gas-like behaviour in CH₄ at 400 K.

Magnetic control of MOF crystal orientation and alignment (2017)
Journal Article
Cheng, F., Marshall, E. S., Young, A. J., Robinson, P. J., Bouillard, J. S. G., Adawi, A. M., Vermeulen, N. A., Farha, O. K., Reithofer, M. R., & Chin, J. M. (2017). Magnetic control of MOF crystal orientation and alignment. Chemistry: a European journal, 23(62), 15578-15582. https://doi.org/10.1002/chem.201703812

Most metal-organic frameworks (MOFs) possess anisotropic properties, the full exploitation of which necessitates a general strategy for the controllable orientation of such MOF crystals. Current methods largely rely upon layer-by-layer MOF epitaxy or... Read More about Magnetic control of MOF crystal orientation and alignment.

Determining molecular orientation via single molecule SERS in a plasmonic nano-gap (2017)
Journal Article
Marshall, A. R. L., Stokes, J., Viscomi, F. N., Proctor, J. E., Gierschner, J., Bouillard, J.-S. G., & Adawi, A. M. (2017). Determining molecular orientation via single molecule SERS in a plasmonic nano-gap. Nanoscale, 9(44), 17415-17421. https://doi.org/10.1039/C7NR05107G

In this work, plasmonic nano-gaps consisting of a silver nanoparticle coupled to an extended silver film have been fully optimized for single molecule Surface-Enhanced Raman Scattering (SERS) spectroscopy. The SERS signal was found to be strongly dep... Read More about Determining molecular orientation via single molecule SERS in a plasmonic nano-gap.

Multiwavelength photoconductivity of ZnO nanoparticles based on surface defects and plasmonics (2017)
Thesis
Ibrahem, M. A. (2017). Multiwavelength photoconductivity of ZnO nanoparticles based on surface defects and plasmonics. (Thesis). University of Hull. Retrieved from https://hull-repository.worktribe.com/output/4221058

ZnO is distinguished as the semiconductor of choice in a variety of applications such as in optoelectronics and photodetectors owing to its superior light sensitivity, the ease of synthesis in a wide range of nanostructure forms and its tuneable opti... Read More about Multiwavelength photoconductivity of ZnO nanoparticles based on surface defects and plasmonics.

Surface enhanced Raman spectroscopy for single molecule detection and biosensing (2017)
Thesis
Marshall, A. R. L. (2017). Surface enhanced Raman spectroscopy for single molecule detection and biosensing. (Thesis). University of Hull. Retrieved from https://hull-repository.worktribe.com/output/4220864

The aim of this thesis is to design plasmonic nano-gaps capable of detecting materials down to sufficiently low concentrations such that single molecule characteristics are observed. We begin first, by discussing the theory of plasmonics. Then, we as... Read More about Surface enhanced Raman spectroscopy for single molecule detection and biosensing.

Dual-modal SERS/fluorescence AuNP probe for mitochondrial imaging (2017)
Journal Article
Eling, C. J., Price, T. W., Marshall, A. R. L., Narda Viscomi, F., Robinson, P., Firth, G., Adawi, A. M., Bouillard, J.-S. G., & Stasiuk, G. J. (2017). Dual-modal SERS/fluorescence AuNP probe for mitochondrial imaging. ChemPlusChem, 82(5), 674-680. https://doi.org/10.1002/cplu.201600593

A novel SERS/fluorescent multimodal imaging probe for mitochondria has been synthesised using 12 nm diameter gold nanoparticles (AuNP) surface functionalised with a rhodamine thiol derivative ligand. The normal pH dependant acidic fluorescence of the... Read More about Dual-modal SERS/fluorescence AuNP probe for mitochondrial imaging.

Excitonic optical Tamm states: a step towards a full molecular-dielectric photonic integration (2016)
Journal Article
Núnez-Sánchez, S., Lopez-Garcia, M., Murshidy, M. M., Abdel-Hady, A. G., Serry, M., Adawi, A. M., Rarity, J. G., Oulton, R., & Barnes, W. L. (2016). Excitonic optical Tamm states: a step towards a full molecular-dielectric photonic integration. ACS Photonics, 3(5), 743-748. https://doi.org/10.1021/acsphotonics.6b00060

We report the first experimental observation of an excitonic optical Tamm state supported at the interface between a periodic multilayer dielectric structure and an organic dye-doped polymer layer. The existence of such states is enabled by the metal... Read More about Excitonic optical Tamm states: a step towards a full molecular-dielectric photonic integration.

Directive emission of red conjugated polymer embedded within zero index metamaterials (2014)
Journal Article
Cao, T., Zou, Y., Adawi, A., & Cryan, M. J. (2014). Directive emission of red conjugated polymer embedded within zero index metamaterials. Optics express, 22(19), 22699-22706. https://doi.org/10.1364/OE.22.022699

Abstract: We numerically demonstrate an impedance-matched multilayer stacked fishnet metamaterial that has zero index with flat high transmittance from 600nm to 620nm. The effective refractive index(𝑛𝑒𝑓𝑓) is calculated to be −0.045 + 0.466i and the n... Read More about Directive emission of red conjugated polymer embedded within zero index metamaterials.

Efficient out-coupling and beaming of Tamm optical states via surface plasmon polariton excitation (2014)
Journal Article
Lopez-Garcia, M., Ho, Y. .-L. D., Taverne, M. P. C., Chen, L.-F., Murshidy, M. M., Edwards, A. P., Serry, M. Y., Adawi, A. M., Rarity, J. G., & Oulton, R. (2014). Efficient out-coupling and beaming of Tamm optical states via surface plasmon polariton excitation. Applied physics letters, 104(23), 231116. https://doi.org/10.1063/1.4882180

We present evidence of optical Tamm states to surface plasmon polariton (SPP) coupling. We experimentally demonstrate that for a Bragg stack with a thin metal layer on the surface, hybrid Tamm-SPP modes may be excited when a grating on the air-metal... Read More about Efficient out-coupling and beaming of Tamm optical states via surface plasmon polariton excitation.

Light emission enhancement using randomly distributed plasmonic nanoparticle arrays (2014)
Journal Article
Butkus, J., Edwards, A. P., Quacquarelli, F. P., & Adawi, A. M. (2014). Light emission enhancement using randomly distributed plasmonic nanoparticle arrays. Optical materials, 36(9), 1502-1505. https://doi.org/10.1016/j.optmat.2014.04.010

We have fabricated and characterised the optical properties of solution processed randomly distributed gold nanoparticle plasmonic arrays that are coated with a thin-film fluorescent dye. Three times enhancement in the emission intensity of the fluor... Read More about Light emission enhancement using randomly distributed plasmonic nanoparticle arrays.

Plasmonic nanogaps for broadband and large spontaneous emission rate enhancement (2014)
Journal Article
Edwards, A. P., & Adawi, A. M. (2014). Plasmonic nanogaps for broadband and large spontaneous emission rate enhancement. Journal of applied physics, 115(5), Article ARTN 053101. https://doi.org/10.1063/1.4864018

We present the optical properties of a plasmonic nanogap formed between a silver metallic nanoparticle and an extended silver film that shows a strong enhancement in the spontaneous emission rate over the whole visible range. In particular, we use th... Read More about Plasmonic nanogaps for broadband and large spontaneous emission rate enhancement.

Temperature dependence of the upper-branch polariton population in an organic semiconductor microcavity (2011)
Journal Article
Coles, D. M., Michetti, P., Clark, C., Adawi, A. M., & Lidzey, D. G. (2011). Temperature dependence of the upper-branch polariton population in an organic semiconductor microcavity. Physical review B: Condensed matter and materials physics, 84(20), 205214-1 - 205214-8. https://doi.org/10.1103/PhysRevB.84.205214

We explore the distribution of polaritons along the upper polariton branch of a strongly coupled organic-semiconductor microcavity as a function of temperature following nonresonant optical excitation. Measurements of polariton emission from a high-f... Read More about Temperature dependence of the upper-branch polariton population in an organic semiconductor microcavity.