liu.seSearch for publications in DiVA
Change search
Link to record
Permanent link

Direct link
BETA
Elsharif Zainelabdin, Ahmed ELtahirORCID iD iconorcid.org/0000-0002-3250-8736
Alternative names
Publications (10 of 11) Show all publications
Amin, G., Asif, M., Elsharif Zainelabdin, A., Zaman, S., Nur, O. & Willander, M. (2012). CuO Nanopetals Based Electrochemical Sensor for Selective Ag+ Measurements. SENSOR LETTERS, 10(3-4), 754-759
Open this publication in new window or tab >>CuO Nanopetals Based Electrochemical Sensor for Selective Ag+ Measurements
Show others...
2012 (English)In: SENSOR LETTERS, ISSN 1546-198X, Vol. 10, no 3-4, p. 754-759Article in journal (Refereed) Published
Abstract [en]

The electrochemical sensing activity of cupric oxide (CuO) nanopetals was investigated for the detection of silver (I) ions (Ag+). The CuO nanopetals were synthesized on a large area glass substrate by a low-temperature hydrothermal growth process. Structural morphological investigations were carried out using field emission scanning electron microscopy, high resolution transmission electron microscopy, and X-ray diffraction. To check the sensing application of the CuO nanopetals, it was functionalized for selectivity of Ag+. A polymeric membrane with Ag+-selective ionophore was coated on the surface of the CuO nanopetals. CuO nanopetals reveal excellent electrochemical sensing behavior in aqueous solution to selectively detect Ag+. The CuO based sensor exhibits a linear electrochemical response within the concentration range of 1 mu M to 100 mM. The functionalized CuO nanopetal based sensor show stable, fast response and high sensitivity for [Ag+]. This work demonstrates a simple technique for sensitive detection of Ag+ and other biochemical species.

Place, publisher, year, edition, pages
American Scientific Publishers, 2012
Keywords
CuO, Nanopetals, Hydrothermal Method, Ag+-Selective Membrane, Electrochemical Sensor
National Category
Engineering and Technology
Identifiers
urn:nbn:se:liu:diva-85097 (URN)10.1166/sl.2012.2336 (DOI)000309018700011 ()
Available from: 2012-11-02 Created: 2012-11-02 Last updated: 2018-02-27
Zainelabdin, A., Amin, G., Zaman, S., Nur, O., Lu, J., Hultman, L. & Willander, M. (2012). CuO/ZnO Nanocorals synthesis via hydrothermal technique: growth mechanism and their application as Humidity Sensor. Journal of Materials Chemistry, 22(23), 11583-11590
Open this publication in new window or tab >>CuO/ZnO Nanocorals synthesis via hydrothermal technique: growth mechanism and their application as Humidity Sensor
Show others...
2012 (English)In: Journal of Materials Chemistry, ISSN 0959-9428, E-ISSN 1364-5501, Vol. 22, no 23, p. 11583-11590Article in journal (Refereed) Published
Abstract [en]

We demonstrate hydrothermal synthesis of coral-like CuO nanostructures by selective growth on ZnO nanorods (NR) at low temperatures. During the hydrothermal processing the resultant hydroxylated and eroded surface of ZnO NR becomes favorable for the CuO nanostructures growth via oriented attachments. Heterojunction p-n diodes fabricated from the CuO/ZnO nanocorals (NC) reveal stable and high rectification diode properties with a turn-on voltage ~1.52 V and negligible reverse current. The humidity sensing characteristics of the CuO/ZnO NC diodes exhibit a remarkable linear (in a semilogarithmic scale) decrease in the DC resistance by more than three orders when the relative humidity is changed from 30 – 90 %. The NC humidity sensor is also found to reveal the highest sensitivity factor ~6045 among available data for the constituent material’s and a response and recovery time of 6 s and 7 s, respectively.

Place, publisher, year, edition, pages
Royal Society of Chemistry, 2012
Keywords
Zinc oxide nanorods, copper oxide nanostructures, nanocorals, relative humidity, sensitivity factor
National Category
Engineering and Technology
Identifiers
urn:nbn:se:liu:diva-76676 (URN)10.1039/c2jm16597j (DOI)000304351400026 ()
Note
funding agencies|Swedish government||Available from: 2012-04-16 Created: 2012-04-16 Last updated: 2017-12-07Bibliographically approved
Zaman, S., Zainelabdin, A., Amin, G., Nour, O. & Willander, M. (2012). Influence of the polymer concentration on the electroluminescence of ZnO nanorod/polymer hybrid light emitting diodes. Journal of Applied Physics, 112(6), 064324
Open this publication in new window or tab >>Influence of the polymer concentration on the electroluminescence of ZnO nanorod/polymer hybrid light emitting diodes
Show others...
2012 (English)In: Journal of Applied Physics, ISSN 0021-8979, E-ISSN 1089-7550, Vol. 112, no 6, p. 064324-Article in journal (Refereed) Published
Abstract [en]

The effects of the polymer concentration on the performance of hybrid light emitting diodes (LEDs) based on zinc oxide nanorods (ZnO NRs) and poly(9,9-dioctylfluorene) (PFO) was investigated. Various characterization techniques were applied to study the performance of the PFO/ZnO NR hybrid LEDs fabricated with various PFO concentrations. The fabricated hybrid LEDs demonstrated stable rectifying diode behavior, and it was observed that the turn-on voltage of the LEDs is concentration dependent. The measured room temperature electroluminescence (EL) showed that the PFO concentration plays a critical role in the emission spectra of the hybrid LEDs. At lower PFO concentrations of 2-6 mg/ml, the EL spectra are dominated by blue emission. However, by increasing the concentration to more than 8 mg/ml, the blue emission was completely suppressed while the green emission was dominant. This EL behavior was explained by a double trap system of excitons that were trapped in the β-phase and/or in the fluorenone defects in the PFO side. The effects of current injection on the hybrid LEDs and on the EL emission were also investigated. Under a high injection current, a new blue peak was observed in the EL spectrum, which was correlated to the creation of a new chemical species on the PFO chain. The green emission peak was also enhanced with increasing injection current because of the fluorenone defects. These results indicate that the emission spectra of the hybrid LEDs can be tuned by using different polymer concentrations and by varying the current injected into the device.

Place, publisher, year, edition, pages
American Institute of Physics (AIP), 2012
Keywords
Hybrid light emitting diodes, ZnO nanorods, PFO, electroluminescence
National Category
Engineering and Technology
Identifiers
urn:nbn:se:liu:diva-81426 (URN)10.1063/1.4754542 (DOI)000309423200142 ()
Available from: 2012-09-14 Created: 2012-09-14 Last updated: 2017-12-07Bibliographically approved
Elsharif Zainelabdin, A. E. (2012). Lighting and Sensing Applications of Nanostructured ZnO, CuO and Their Composites. (Doctoral dissertation). Linköping: Linköping University Electronic Press
Open this publication in new window or tab >>Lighting and Sensing Applications of Nanostructured ZnO, CuO and Their Composites
2012 (English)Doctoral thesis, comprehensive summary (Other academic) [Artistic work]
Abstract [en]

Low dimensional nanostructures of zinc oxide (ZnO), cupric oxide (CuO), and their composite nanostructures possess remarkable physical and chemical properties. Fundamental understanding and manipulation of these unique properties are crucial for all potential applications. Integration of nanostructured ZnO and CuO and their hybrid composites may play a significant role in the existing technology while paving the way for new exciting areas. Solution based low temperature synthesis of ZnO and CuO nanostructures have attracted extensive research efforts during the last decade. These efforts resulted in a plenteous number of nanostructures ranging from quantum dots into very complex three dimensional nanomaterials. Among the various low temperature synthesis methods the hydrothermal technique became one of the most popular approaches. The use of hydrothermal approach enabled the synthesis of diversity of nanomaterials on conventional and nonconventional substrates such as metals, glass, plastic and paper etc.

The primary objectives of this thesis are to study and understand the characteristics of nanostructured ZnO, CuO, and their hybrid composites synthesized at low temperature. Likewise, the hybrid composites were successfully utilized to fabricate light emitting diodes and sensors. This thesis is organized into three major parts. In the beginning the synthesis and characterization of nanostructured ZnO, CuO, and their composite nanostructures are elaborated. Efforts have been made to understand the selective assembly of hierarchical CuO nanostructures on ZnO nanorods and to correlate it to the observed unique properties of the CuO/ZnO composite nanostructures. In the second part of the thesis fabrication, characterization, and device application of ZnO/p-polymer hybrid light emitting diode (HyLEDs) on flexible substrates are presented. In particular single and blended p-type light emissive polymers were controllably developed for potential greener and cheaper white light emitters. It was found that the HyLEDs exhibited rectifying diode characteristics together with white light emission covering the entire visible range. In the third part, pH and relative humidity sensing applications of CuO nanoflowers, and CuO/ZnO nanocorals, respectively, are described. A pH sensor based on CuO nanoflowers demonstrated good sensitivity and reproducibility over a wide range of pH. By taking the advantages of the selective growth of CuO nanostructures on ZnO nanorods and their naturally formed p-n heterojunction the realization of high sensitivity humidity sensor was achieved. The humidity sensor fabricated from the CuO/ZnO nanocorals displayed the highest sensitivity factor reported so far for its constituent materials; along with reasonably fast dynamic responses. A brief outlook into future challenges and opportunities are also presented in the last part of the thesis. 

Place, publisher, year, edition, pages
Linköping: Linköping University Electronic Press, 2012. p. 79
Series
Linköping Studies in Science and Technology. Dissertations, ISSN 0345-7524 ; 1484
Keywords
ZnO, CuO, Nanostructures, Composites, ZnO/polymer LEDs, humidity sensor, p-n heterojunction
National Category
Engineering and Technology
Identifiers
urn:nbn:se:liu:diva-85111 (URN)978-91-7519-755-5 (ISBN)
Public defence
2012-12-06, Kåkenhus, Campus Norrköping, Linköpings universitet, Norrköping, 10:00 (English)
Opponent
Supervisors
Projects
Nanophotonics
Available from: 2012-11-27 Created: 2012-11-05 Last updated: 2017-02-23Bibliographically approved
Elsharif Zainelabdin, A., Nur, O., Amin, G., Zaman, S. & Willander, M. (2012). Metal Oxide Nanostructures and White Light Emission. Proceedings of SPIE, the International Society for Optical Engineering, 8263(82630N)
Open this publication in new window or tab >>Metal Oxide Nanostructures and White Light Emission
Show others...
2012 (English)In: Proceedings of SPIE, the International Society for Optical Engineering, ISSN 0277-786X, E-ISSN 1996-756X, Vol. 8263, no 82630NArticle in journal (Refereed) Published
Abstract [en]

We report on white light emission from zinc oxide nanostructures chemically grown on paper substrates. The effect of the growth solution pH on the morphology is discussed. The light emission form light emitting diodes based on ZnO nanorods/organic polymer hybrids on paper substrate is presented. Further copper oxide was grown on the walls of zinc oxide nanorods and the optical properties were investigated.

Place, publisher, year, edition, pages
International Society for Optical Engineering; 1999, 2012
Keywords
nanostructures; zinc oxide; copper oxide
National Category
Engineering and Technology
Identifiers
urn:nbn:se:liu:diva-87980 (URN)10.1117/12.909342 (DOI)000303381200013 ()
Available from: 2013-01-28 Created: 2013-01-28 Last updated: 2017-12-06
Amin, G., Sandberg, M. O., Zainelabdin, A., Zaman, S., Nur, O. & Willander, M. (2012). Scale-up synthesis of ZnO nanorods for printing inexpensive ZnO/polymer white light-emitting diode. Journal of Materials Science, 47(11), 4726-4731
Open this publication in new window or tab >>Scale-up synthesis of ZnO nanorods for printing inexpensive ZnO/polymer white light-emitting diode
Show others...
2012 (English)In: Journal of Materials Science, ISSN 0022-2461, E-ISSN 1573-4803, Vol. 47, no 11, p. 4726-4731Article in journal (Refereed) Published
Abstract [en]

In this study, possibilities of scaling up the synthesis of zinc oxide (ZnO) nanorods (NRs) by the hydrothermal method have been explored. It was found that batches yielding several grams can easily be made using common and easily available materials. Further, a printable composition was fabricated by mixing the obtained ZnO NRs into a common solvent-based screen printable varnish. Scanning electron microscope, high-resolution transmission electron microscope, X-ray diffraction, UV–vis spectroscopy analysis of the scaled up batch indicated that the ZnO nanostructures were of NRs shape, well crystalline and having less defects. Using the ZnO NRs-based printable composition a device fabrication on a flexible substrate was demonstrated, producing a flexible light-emitting device being highly tolerant to bending.

Place, publisher, year, edition, pages
Springer, 2012
National Category
Engineering and Technology
Identifiers
urn:nbn:se:liu:diva-76674 (URN)10.1007/s10853-012-6342-1 (DOI)000302244500026 ()
Available from: 2012-04-16 Created: 2012-04-16 Last updated: 2017-12-07Bibliographically approved
Willander, M., Nur, O., Amin, G., Zainelabdin, A. & Zaman, S. (2012). Zinc oxide and copper oxide nanostructures: Fundamentals and applications. In: Materials Research Society Symposium Proceedings: vol 1406. Paper presented at Materials Research Society Symposium (pp. 3-10). Warrendale, Pa.; Materials Research Society; 1999, 1406
Open this publication in new window or tab >>Zinc oxide and copper oxide nanostructures: Fundamentals and applications
Show others...
2012 (English)In: Materials Research Society Symposium Proceedings: vol 1406, Warrendale, Pa.; Materials Research Society; 1999 , 2012, Vol. 1406, p. 3-10Conference paper, Published paper (Refereed)
Abstract [en]

Copper oxide (CuO) and zinc oxide (ZnO) nanostructures complement each other since CuO is unintentional p-type and ZnO unintentional n-type. Using the low temperature chemical growth approach, the effect on morphology of varying the pH of the grown ZnO nanostructures and CuO micro structures is monitored. For both materials the variation of the pH was found to lead to a large variation on the morphology achieved. The grown ZnO NRs and CuO micro flowers material were used to fabricate devices. We demonstrate results from ZnO nanorods (NRs)/polymer p-n hybrid heterojunctions chemically grown on paper and using a process on paper for light emitting diodes (LEDs) applications as well as some large area light emitting diodes LEDs. The growth of CuO micro flowers indicated good quality material for sensing applications. The grown CuO micro flowers were employed as pH sensors. The results indicated a superior performance as expect due to the catalytic properties of this material. © 2012 Materials Research Society.

Place, publisher, year, edition, pages
Warrendale, Pa.; Materials Research Society; 1999, 2012
Series
Materials Research Society Symposium Proceedings, ISSN 0272-9172
National Category
Engineering and Technology
Identifiers
urn:nbn:se:liu:diva-101137 (URN)10.1557/opl.2012.65 (DOI)
Conference
Materials Research Society Symposium
Available from: 2013-11-20 Created: 2013-11-19 Last updated: 2017-02-23
Amin, G., Asif, M., Zainelabdin, A., Zaman, S., Nur, O. & Willander, M. (2011). Influence of pH, Precursor Concentration, Growth Time, and Temperature on the Morphology of ZnO Nanostructures Grown by the Hydrothermal Method. Journal of Nanomaterials (269692)
Open this publication in new window or tab >>Influence of pH, Precursor Concentration, Growth Time, and Temperature on the Morphology of ZnO Nanostructures Grown by the Hydrothermal Method
Show others...
2011 (English)In: Journal of Nanomaterials, ISSN 1687-4110, E-ISSN 1687-4129, no 269692Article in journal (Refereed) Published
Abstract [en]

We investigated the influence of the pH value, precursor concentration (C), growth time and temperature on the morphology of zinc oxide (ZnO) nanostructures. The pH of the starting solution was varied from1.8 to 12.5. It was found that the final pH reaches an inherent value of 6.6 independently of the initial pH solution. Various ZnO structures of nanotetrapod-like, flower-like, and urchin-like morphology were obtained at alkaline pH (8 to 12.5) whereas for pH solution lower than 8 rod-like nanostructures occurred. Moreover, we observed the erosion of the nanorods for a pH value less than 4.6. By changing the concentrations the density and size were also varied. On going from a high (C > 400mM) to lower (C < 25mM) C, the resulted ZnO nanostructures change from a film to nanorods (NRs) and finally nanowires (NWs). It was also found that the length and diameter of ZnO NRs follow a linear relation with time up to 10 hours, above which no further increase was observed. Finally the effect of growth temperature was seen as an influence on the aspect ratio.

Place, publisher, year, edition, pages
NY, USA: Hindawi Publishing Corporation, 2011
National Category
Engineering and Technology
Identifiers
urn:nbn:se:liu:diva-74729 (URN)10.1155/2011/269692 (DOI)000298424100001 ()
Note
funding agencies|advanced Functional Material project Sweden||Available from: 2012-02-06 Created: 2012-02-06 Last updated: 2017-12-08Bibliographically 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
Show others...
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
Willander, M., Nur, O., Sadaf, J. R., Qadir, M. I., Zaman, S., Zainelabdin, A., . . . Hussain, I. (2010). Luminescence from Zinc Oxide Nanostructures and Polymers and their Hybrid Devices. Materials, 3(4), 2643-2667
Open this publication in new window or tab >>Luminescence from Zinc Oxide Nanostructures and Polymers and their Hybrid Devices
Show others...
2010 (English)In: Materials, ISSN 1996-1944, E-ISSN 1996-1944, Vol. 3, no 4, p. 2643-2667Article, review/survey (Refereed) Published
Abstract [en]

Zinc oxide (ZnO) is a strong luminescent material, as are several polymers. These two materials have distinct drawbacks and advantages, and they can be combined to form nanostructures with many important applications, e. g., large-area white lighting. This paper discusses the origin of visible emission centers in ZnO nanorods grown with different approaches. White light emitting diodes (LEDs) were fabricated by combining n-ZnO nanorods and hollow nanotubes with different p-type materials to form heterojunctions. The p-type component of the hybrids includes p-SiC, p-GaN, and polymers. We conclude by analyzing the electroluminescence of the different light emitting diodes we fabricated. The observed optical, electrical, and electro-optical characteristics of these LEDs are discussed with an emphasis on the deep level centers that cause the emission.

Place, publisher, year, edition, pages
Basel, Switzerland: MDPI AG, 2010
Keywords
ZnO nanostructures, deep center luminescence, light emitting diodes, hybrid technology
National Category
Materials Engineering
Identifiers
urn:nbn:se:liu:diva-103165 (URN)10.3390/ma3042643 (DOI)000298240800020 ()
Available from: 2014-01-14 Created: 2014-01-14 Last updated: 2017-12-06Bibliographically approved
Organisations
Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0002-3250-8736

Search in DiVA

Show all publications