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Sadaf, Jamil Rana
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Publications (10 of 19) Show all publications
Ali, A., Israr-Qadir, M., Wazir, Z., Tufail, M., Ibupoto, Z. H., Jamil-Rana, S., . . . Willander, M. (2015). Cobalt oxide magnetic nanoparticles-chitosan nanocomposite based electrochemical urea biosensor. Indian Journal of Physics, 89(4), 331-336
Open this publication in new window or tab >>Cobalt oxide magnetic nanoparticles-chitosan nanocomposite based electrochemical urea biosensor
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2015 (English)In: Indian Journal of Physics, ISSN 0973-1458, E-ISSN 0974-9845, Vol. 89, no 4, p. 331-336Article in journal (Refereed) Published
Abstract [en]

In this study, a potentiometric urea biosensor has been fabricated on glass filter paper through the immobilization of urease enzyme onto chitosan/cobalt oxide (CS/Co3O4) nanocomposite. A copper wire with diameter of 500 mu m is attached with nanoparticles to extract the voltage output signal. The shape and dimensions of Co3O4 magnetic nanoparticles are investigated by scanning electron microscopy and the average diameter is approximately 80-100 nm. Structural quality of Co3O4 nanoparticles is confirmed from X-ray powder diffraction measurements, while the Raman spectroscopy has been used to understand the chemical bonding between different atoms. The magnetic measurement has confirmed that Co3O4 nanoparticles show ferromagnetic behavior, which could be attributed to the uncompensated surface spins and/or finite size effects. The ferromagnetic order of Co3O4 nanoparticles is raised with increasing the decomposition temperature. A physical adsorption method is adopted to immobilize the surface of CS/Co3O4 nanocomposite. Potentiometric sensitivity curve has been measured over the concentration range between 1 x 10(-4) and 8 x 10(-2) M of urea electrolyte solution revealing that the fabricated biosensor holds good sensing ability with a linear slope curve of similar to 45 mV/decade. In addition, the presented biosensor shows good reusability, selectivity, reproducibility and resistance against interferers along with the stable output response of similar to 12 s.

Place, publisher, year, edition, pages
Springer Verlag (Germany), 2015
Keywords
Potentiometric biosensors; Metal oxide; Nanoparticles and urea sensing
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
urn:nbn:se:liu:diva-117212 (URN)10.1007/s12648-014-0594-3 (DOI)000351564800004 ()
Note

Funding Agencies|King Saud University, Deanship of Scientific Research, College of Science Research Center

Available from: 2015-04-22 Created: 2015-04-21 Last updated: 2018-02-27
Israr Qadir, M., Jamil Rana, S., Nur, O., Willander, M., Lu, J. & Hultman, L. (2014). Cathodoluminescence characterization of ZnO nanorods synthesized by chemical solution and of its conversion to ellipsoidal morphology. Journal of Materials Research, 29(20), 2425-2431
Open this publication in new window or tab >>Cathodoluminescence characterization of ZnO nanorods synthesized by chemical solution and of its conversion to ellipsoidal morphology
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2014 (English)In: Journal of Materials Research, ISSN 0884-2914, E-ISSN 2044-5326, Vol. 29, no 20, p. 2425-2431Article in journal (Refereed) Published
Abstract [en]

A facile and reproducible low-temperature (80 degrees C) solution route has been introduced to synthesize ZnO ellipsoids on silicon substrate without any pretreatment of the substrate or organic/inorganic additives. Scanning electron microscopy, transmission electron microscopy, and x-ray diffraction spectroscopy are performed to analyze the structural evolution, the single crystalline nature, and growth orientation at different stages of the synthetic process. The sequential formation mechanisms of heterogeneous nucleation in primary and secondary crystal growth behaviors have been discussed in detail. The presented results reveal that the morphology of micro/nanostructures with desired features can be optimized. The optical properties of grown structures at different stages were investigated using cathodoluminescence (CL). The monochromatic CL images were recorded to examine the UV and visible band emission contributions from the different positions of the intermediate and final structures of the individual ZnO ellipsoid. Significant enhancement in the defect level emission intensity at the central position of the structure reveals that the quality of the material improves as the reaction time is extended.

Place, publisher, year, edition, pages
Cambridge University Press (CUP): STM Journals, 2014
National Category
Electrical Engineering, Electronic Engineering, Information Engineering Physical Sciences
Identifiers
urn:nbn:se:liu:diva-112831 (URN)10.1557/jmr.2014.242 (DOI)000344477500008 ()
Note

Funding Agencies|Higher Education Commission (HEC), Pakistan

Available from: 2015-01-08 Created: 2014-12-17 Last updated: 2018-02-27
Israr Qadir, M., Jamil Rana, S., Nur, O., Willander, M., Larsson, L. & Holtz, P.-O. (2014). Fabrication of ZnO nanodisks from structural transformation of ZnO nanorods through natural oxidation and their emission characteristics. Ceramics International, 40(1), 2435-2439
Open this publication in new window or tab >>Fabrication of ZnO nanodisks from structural transformation of ZnO nanorods through natural oxidation and their emission characteristics
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2014 (English)In: Ceramics International, ISSN 0272-8842, E-ISSN 1873-3956, Vol. 40, no 1, p. 2435-2439Article in journal (Refereed) Published
Abstract [en]

An environmentally benign natural oxidation based synthetic technique has been developed to grow and transform the ZnO nanorods into nanodisks at a very mild temperature of 55 degrees C with excellent features of its novelty and reproducibility. Metallic zinc foil and formamide solution have been utilized as substrate and reacting solution, respectively, for the growth of ZnO nanostructures. The optimized values of temperature, concentration of formamide and the reaction time are achieved to obtain the controlled and desired nanoscale morphologies. Detailed mechanism of the structural transformation of the nanorods into nanodisks has been discussed. Strong ultraviolet emission peak along with the much weaker deep level defects related emission has been realized in the microphotoluminescence spectrum. A visible red-shift and decrease in the intensity of ultraviolet peak are observed with increasing range of temperature from 20 to 300 K.

Place, publisher, year, edition, pages
Elsevier, 2014
Keywords
Zinc oxide; Formamide; Natural oxidation; Nanodisks; Emission characteristics
National Category
Engineering and Technology
Identifiers
urn:nbn:se:liu:diva-105038 (URN)10.1016/j.ceramint.2013.08.017 (DOI)000330820600151 ()
Available from: 2014-03-06 Created: 2014-03-06 Last updated: 2017-12-05
Jamil-Rana, S., Israr-Qadir, M., Nur, O. & Willander, M. (2014). Naturally oxidized synthesis of ZnO dahlia-flower nanoarchitecture. Ceramics International, 40(8), 13667-13671
Open this publication in new window or tab >>Naturally oxidized synthesis of ZnO dahlia-flower nanoarchitecture
2014 (English)In: Ceramics International, ISSN 0272-8842, E-ISSN 1873-3956, Vol. 40, no 8, p. 13667-13671Article in journal (Refereed) Published
Abstract [en]

Three dimensional ZnO dahlia-flowers have been engineered at room temperature relying on natural oxidation based aqueous chemical synthetic approach. Glycine abetted multicomponent isotropic morphology has been synthesized through the conglomeration of thin nanopetals as building blocks with highly large surface area to volume ratio. Highly controllable morphology of thin nanopetals is achieved by stabilizing their polar faces through the adsorption of reactive hydroxyl and amide functions of glycine. Fourier transform infrared conclusions also exemplify good corroboration towards the use of organic additives. Moreover, the synthesized ZnO flowers have been utilized to fabricate cholesterol biosensor and biosensing measurements which have been performed over the cholesterol concentration range of 1 x 10(-6) M to 1 x 10(-3) M.

Place, publisher, year, edition, pages
Elsevier, 2014
Keywords
Zinc oxide; Glycine; FTIR; Aqueous chemical growth; Cholesterol biosensing
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
urn:nbn:se:liu:diva-110470 (URN)10.1016/j.ceramint.2014.04.108 (DOI)000340321300133 ()
Available from: 2014-09-15 Created: 2014-09-12 Last updated: 2017-12-05Bibliographically approved
Imran, Z., Batool, S. S., Jamil, H., Usman, M., Israr Qadir, M., Shah, S. H., . . . Willander, M. (2013). Excellent humidity sensing properties of cadmium titanate nanofibers. Ceramics International, 39(1), 457-462
Open this publication in new window or tab >>Excellent humidity sensing properties of cadmium titanate nanofibers
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2013 (English)In: Ceramics International, ISSN 0272-8842, E-ISSN 1873-3956, Vol. 39, no 1, p. 457-462Article in journal (Refereed) Published
Abstract [en]

We report humidity sensing characteristics of CdTiO3 nanofibers prepared by electrospinning. The nanofibers were porous having an average diameter and length of similar to 50-200 nm and similar to 100 mu m, respectively. The nanofiber humidity sensor was fabricated by defining aluminum electrodes using photolithography on top of the nanofibers deposited on glass substrate. The performance of the CdTiO3 nanofiber humidity sensor was evaluated by AC electrical characterization from 40% to 90% relative humidity at 25 degrees C. The frequency of the AC signal was varied from 10(-1) to 10(6) Hz. Fast response time and recovery time of 4 s and 6 s were observed, respectively. The sensor was highly sensitive and exhibited a reversible response with small hysteresis of less than 7%. Long term stability of the sensor was confirmed during 30 day test. The excellent sensing characteristics prove that the CdTiO3 nanofibers are potential candidate for use in high performance humidity sensors.

Place, publisher, year, edition, pages
Elsevier, 2013
Keywords
Cadmium titanate, Nanofibers, Humidity sensor, Response time
National Category
Engineering and Technology
Identifiers
urn:nbn:se:liu:diva-90214 (URN)10.1016/j.ceramint.2012.06.048 (DOI)000315246300059 ()
Note

Funding Agencies|Higher Education Commission (HEC), Pakistan||

Available from: 2013-03-21 Created: 2013-03-21 Last updated: 2017-12-06
Batool, S. S., Imran, Z., Israr Qadir, M., Jamil Rana, S., Usman, M., Jamil, H., . . . Willander, M. (2013). Silica nanofibers based impedance type humidity detector prepared on glass substrate. Vacuum, 87, 1-6
Open this publication in new window or tab >>Silica nanofibers based impedance type humidity detector prepared on glass substrate
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2013 (English)In: Vacuum, ISSN 0042-207X, E-ISSN 1879-2715, Vol. 87, p. 1-6Article in journal (Refereed) Published
Abstract [en]

Impedance type relative humidity detector is fabricated by depositing electrospun silica nanofibers on glass substrate. The silica nanofibers with an average diameter similar to 150 nm and length similar to 100 mu m were used. Thermogravimetric and differential scanning calorimetric analysis confirm that the accurate annealing temperature is 500 degrees C for complete removal of PVP. Humidity detecting devices were fabricated by defining titanium electrodes on top of the silica nanofibers. The performance of silica nanofibers humidity detectors was tested by AC electrical measurements at 40-90% relative humidity. The response and the recovery times were 5 s and 3 s, respectively, between 40% and 90% relative humidity. Contribution of dipoles, space charge polarization, relaxation of these dipoles and low frequency dispersion phenomenon were observed during impedance measurements.

Place, publisher, year, edition, pages
Elsevier, 2013
Keywords
SiO2 nanofibers, Electric modulus, Humidity detector, Response time
National Category
Engineering and Technology
Identifiers
urn:nbn:se:liu:diva-86108 (URN)10.1016/j.vacuum.2012.06.016 (DOI)000310549900001 ()
Note

Funding Agencies|Higher Education Commission (HEC)||

Available from: 2012-12-07 Created: 2012-12-07 Last updated: 2017-12-07
Jamil Rana, S. (2012). Chemically Synthesized ZnO Nanostructures: Realization of White Optoelectronic Devices with High CRI Values. (Doctoral dissertation). Linköping: Linköping University Electronic Press
Open this publication in new window or tab >>Chemically Synthesized ZnO Nanostructures: Realization of White Optoelectronic Devices with High CRI Values
2012 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

Recently in a couple of decades, nanotechnology and nanoscience are becoming wide spread fields of research due to the revolutionary advances in the manufacturing processes which enable the realization of infinitesimally modest nanodevices holding a huge variety of fascinating properties and applications. Besides various functional materials, ZnO has captivated interests for a variety of applications in electronics and optoelectronics owing to its unique characteristics; such as, direct wide band gap, large exciton binding energy, semiconducting, photonic, and piezoelectric properties. A distinguished capability of the ZnO material is the effortless synthesis of nanoscale structures with enormous assortments in their morphological and dimensional aspects. Regardless the significant developments in the fabrication of ZnO based homojunction optoelectronic nanodevices, the stable and reproducible p-type conductivity of ZnO material is still a challenge which is one of the paramount factors of the increasing interest for fabrication of heterojunction of ZnO nanostructures with other mainstream ptype semiconductors, such as Si, GaN, and organic materials.

Herein, ZnO nanorods, nanotubes and nanoflowers have been synthesized by solution-based methodology at low temperature (<100 ˚C) and a thorough study on the applications of ZnO nanostructures as white light emitting diodes (LEDs) has been perceived. At the outset, ZnO nanotubes have been synthesized by the trimming of aqueous chemically grown ZnO nanorods with 100% yield and their comparative optical properties have been explored through photoluminescence study, and a profound enhancement in ultraviolet and visible emission is observed (paper I). ZnO nanotubes are further exploited for its promising application as an optoelectronic device. Pure white light emission is observed from the ZnO nanotubes/p-GaN based LED. To analyze the location of the recombination of electron–hole and current transport mechanisms, the EL characteristics of n-ZnO nanotubes/p-GaN heterostructure LED have been investigated under forward and reverse bias. The origin of distinctly different EL peaks under both configurations has been suggested and the influence of increasing values of temperature on the device characteristics is also studied under fixed applied current, in order to check its performance under harsh conditions and for practical  applications (paper II-III). Moreover, it is observed that ZnO-nanotubes/GaN heterostructure LED has an ability to produce an environmentally benign alternative of traditional lighting sources with high color rendering index (CRI) of 96 (paper IV). On the basis of EL, cathodoluminescence and transmission electron microscopy investigations; a robust correspondence has been established between the formation of radiative surface defect states in the nanotubes and the pure cool white light with appropriate color temperature. In paper V, a miniaturized white LED has been developed using Au/n-ZnO nanorods integrated on a glass pipette (having a sharp cylindrical tip with the diameter of 700 nm) which exhibits a broad EL band emission covering the whole visible spectrum range and a CRI value of 73. Besides one-dimensional ZnO nanostructures (nanorods and nanotubes), three-dimensional ZnO dahlia-flower nanoarchitectures have also been fabricated at room temperature relying on natural oxidation based aqueous chemically synthetic approach (paper VI).  Glycineassisted multi-oriented ZnO nanoflowers with highly large surface area to volume ratio have been synthesized on Zn foil substrate through the self-assembly of thin nano-petals as building blocks and polar surfaces of ZnO have been anticipated to be  stabilized through the adsorption of reactive hydroxyl and amide functions of glycine.

Place, publisher, year, edition, pages
Linköping: Linköping University Electronic Press, 2012. p. 62
Series
Linköping Studies in Science and Technology. Dissertations, ISSN 0345-7524 ; 1466
National Category
Natural Sciences
Identifiers
urn:nbn:se:liu:diva-80634 (URN)978-91-7519-833-0 (ISBN)
Public defence
2012-09-14, K3, Kåkenhus, Campus Norrköping, Linköpings universitet, Norrköping, 10:15 (English)
Opponent
Supervisors
Available from: 2012-08-28 Created: 2012-08-28 Last updated: 2019-05-07Bibliographically approved
Willander, M., Qadir, M. I., Rana, S. J. & Nour, O. (2012). Progress on one-dimensional zinc oxide nanomaterials based photonic devices. Nanophotonics, 1(1), 99-115
Open this publication in new window or tab >>Progress on one-dimensional zinc oxide nanomaterials based photonic devices
2012 (English)In: Nanophotonics, ISSN 2192-8606, Vol. 1, no 1, p. 99-115Article in journal (Refereed) Published
Abstract [en]

One-dimensional nanostructures hold the most attractive and excellent physiochemical characteristics which exhibit the paramount influence on the fundamental and technological nanoelectronic as well as nanophotonic applications. In this review article, we present a detailed introduction to the diverse synthetic procedures which can be utilized for the fabrication of single-, planar- and three-dimensional ZnO nanostructures. More specifically, a thorough discussion regarding luminescence characteristics of the one-dimensional ZnO nanostructures is presented for ultraviolet and visible regions. We summarize the room temperature spontaneous emission and stimulated emission along with the interaction of the incident beam with material cavity to produce resonant optical modes and low-temperature time resolved photoluminescence studies. The most recent published results on the white light emitting diodes fabricated with the combination of ZnO nanotubes with p-GaN and ZnO nanorods with p-organic polymers on glass and disposable paper are discussed. Additionally, the significant results on optically and electrically pumped lasers are discussed; along with an overview on the future of ZnO nanostructures based photonic devices.

Place, publisher, year, edition, pages
Walter de Gruyter, 2012
Keywords
zinc oxide; nanostructures; light emitting diodes; laser diodes
National Category
Condensed Matter Physics
Identifiers
urn:nbn:se:liu:diva-93245 (URN)10.1515/nanoph-2012-0006 (DOI)000208897700010 ()
Available from: 2013-05-28 Created: 2013-05-28 Last updated: 2018-07-19Bibliographically approved
Willander, M., Nur, O., Fakhar-e-Alam, M., Jamil Rana, S., Israr Qadir, M., Sultana, K., . . . Asif, M. (2011). Applications of Zinc Oxide Nanowires for Bio-photonics and Bio-electronics. In: Ferechteh Hosseini Teherani, David C. Look, David J. Rogers (Ed.), Proceedings of SPIE Volume 7940. Paper presented at Conference on Oxide-based Materials and Devices II, San Francisco, CA, USA, JAN 23-26, 2011. Bellingham, Washington, USA: SPIE - International Society for Optical Engineering
Open this publication in new window or tab >>Applications of Zinc Oxide Nanowires for Bio-photonics and Bio-electronics
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2011 (English)In: Proceedings of SPIE Volume 7940 / [ed] Ferechteh Hosseini Teherani, David C. Look, David J. Rogers, Bellingham, Washington, USA: SPIE - International Society for Optical Engineering, 2011Conference paper, Published paper (Other academic)
Abstract [en]

Using zinc oxide (ZnO) nanostructures, nanorods (NRs) and nanoparticles (NPs) grown on different substrates (sub-micrometer glass pipettes, thin silver wire and on plastic substrate) different bio-sensors were demonstrated. The demonstrated sensors are based on potentiometric approach and are sensitive to the ionic metals and biological analyte in question. For each case a selective membrane or enzyme was used. The measurements were performed for intracellular environment as well as in some cases (cholesterol and uric acid). The selectivity in each case is tuned according to the element to be sensed. Moreover we also developed photodynamic therapy approach based on the use of ZnO NRs and NPs. Necrosis/apoptosis was possible to achieve for different types of cancerous cell. The results indicate that the ZnO with its UV and white band emissions is beneficial to photodynamic therapy technology.

Place, publisher, year, edition, pages
Bellingham, Washington, USA: SPIE - International Society for Optical Engineering, 2011
Series
Proceedings of SPIE, ISSN 0277-786X ; 7940
National Category
Engineering and Technology
Identifiers
urn:nbn:se:liu:diva-74722 (URN)10.1117/12.879497 (DOI)9780819484772 (ISBN)
Conference
Conference on Oxide-based Materials and Devices II, San Francisco, CA, USA, JAN 23-26, 2011
Available from: 2012-02-06 Created: 2012-02-06 Last updated: 2014-01-15Bibliographically approved
Willander, M., Nur, O., Zaman, S., Zainelabdin, A., Amin, G., Jamil Rana, S., . . . Alvi, N. u. (2011). Intrinsic White Light Emission from Zinc Oxide Nanorods Heterojunctions on Large Area Substrates. In: Ferechteh Hosseini Teherani, David C. Look, David J. Rogers (Ed.), Proceedings of SPIE Volume 7940. Paper presented at Conference on Oxide-based Materials and Devices II, San Francisco, CA, USA, JAN 23-26, 2011. Bellingham, Washington, USA: SPIE - International Society for Optical Engineering
Open this publication in new window or tab >>Intrinsic White Light Emission from Zinc Oxide Nanorods Heterojunctions on Large Area Substrates
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2011 (English)In: Proceedings of SPIE Volume 7940 / [ed] Ferechteh Hosseini Teherani, David C. Look, David J. Rogers, Bellingham, Washington, USA: SPIE - International Society for Optical Engineering, 2011Conference paper, Published paper (Other academic)
Abstract [en]

Zinc oxide (ZnO) and especially in the nanostructure form is currently being intensively investigated world wide for the possibility of developing different new photonic devices. We will here present our recent findings on the controlled low temperature chemical growth of ZnO nanorods (NRs) on different large area substrates. Many different heterojunctions of ZnO NRs and p-substrates including those of crystalline e. g. p-GaN, p-SiC or amorphous nature e. g. p-polymer coated plastic and p-polymer coated paper will be shown. Moreover, the effect of the p-electrode of these heterojunctions on tuning the emitted wavelength and changing the light quality will be discussed. An example using ZnO NR/p-GaN will be shown and the electrical and electro-optical characteristics will be analyzed. For these heterojunctions the effect of post growth annealing and its effect on the electroluminescence (EL) spectrum will be shown. Finally, intrinsic white light emitting diodes based on ZnO NRs on foldable and disposable amorphous substrates (plastic and paper) will also be presented.

Place, publisher, year, edition, pages
Bellingham, Washington, USA: SPIE - International Society for Optical Engineering, 2011
Series
Proceedings of SPIE, ISSN 0277-786X ; 7940
National Category
Engineering and Technology
Identifiers
urn:nbn:se:liu:diva-74726 (URN)10.1117/12.879327 (DOI)9780819484772 (ISBN)
Conference
Conference on Oxide-based Materials and Devices II, San Francisco, CA, USA, JAN 23-26, 2011
Available from: 2012-02-06 Created: 2012-02-06 Last updated: 2017-02-23Bibliographically approved
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