News


Almansouri at Lindau Nobel Laureate Meeting

posted Feb 28, 2019, 9:16 PM by Khaled salama

Its with great pleasure to announce that PhD student, Abdullah Almansouri, was selected by the scientific review panel of the Council for the Lindau Nobel Laureate Meetings to participate in the 69th Lindau Nobel Laureate Meeting taking place from 30 June to 05 July 2019 in Lindau, Germany. Only the 600 most qualified young scientists can be given the opportunity to enrich and share the unique atmosphere of the Lindau Nobel Laureate Meetings. The Lindau Nobel Laureate Meetings are annual, scientific conferences held in Lindau, Bavaria, Germany since 1951. Their aim is to bring together Nobel laureates and young scientists to foster scientific exchange between different generations and cultures.Every Lindau Meeting consists of a multitude of scientific sessions like plenary lectures and panel discussions as well as a variety of networking and social events. The meetings assume a unique position amongst international scientific conferences: With 30-40 Nobel laureates attending they are the largest congregation of Nobel laureates (apart from the Nobel Prize Award Ceremonies in Stockholm) in the world. The meetings are not centered on the presentation of research results, but instead, their main goals are the exchange of ideas and the discussion of topics globally relevant to all scientists.

Dr Agamyrat is in the house

posted Feb 24, 2019, 6:53 PM by Khaled salama

It is with great pleasure to share that, Agamyrat Agambayev earned a couple of letters, Dr, in front of his name :) He successfully defended his PhD thesis titled "Design, fabrication and application of a fractional order capacitor".
 Agamyrat proposed a generic strategy for fractional-order capacitor fabrication that integrates layers of conductive, semiconductor and ferroelectric polymer materials to create a composite with significantly improved constant phase angle, constant phase zone, and phase angle variation performance.  To prove the viability of this method, we have successfully fabricated fractional-order capacitors with the following: nanoparticles such as multiwall carbon nanotube (MWCNT), Molybdenum sulfide (MoS2) inserted ferroelectric polymers and PVDF based ferroelectric polymer blends. They show better performance in terms of fabrication cost and dynamic range of constant phase angle compared to fractional order capacitor from graphene percolated polymer composites.




This work resulted in the following  journal publications:
  1. Agamyrat Agambayev, Mohamed Farhat, Shashikant P. Patole, Ali H. Hassan, Hakan Bagci, and Khaled N. Salama "An ultra-broadband single-component fractional-order capacitor using MoS2 ferroelectric polymer composite," Applied Physics Letters, 113, 093505 (2018); doi: 10.1063/1.5040345
  2. Kartci, Aslihan, Agamyrat Agambayev, Norbert Herencsar, and Khaled N. Salama. "Series-, Parallel-, and Inter-Connection of Solid-State Arbitrary Fractional-Order Capacitors: Theoretical Study and Experimental Verification." IEEE Access, vol. 6, no. 1, pp. 10933-10943, 2018 doi: 10.1109/ACCESS.2018.2809918
  3.  A. Agambayev, K. H. Rajab, A. H. Hassan, M. Farhat, H. Bagci, and K. N. Salama Towards fractional-order capacitors with broad tunable constant phase angles: Multi-walled carbon nanotube-polymer composite as a case study J. Phys. D: Appl. Phys. 51 065602, 2018
  4.  Agamyrat Agambayev, Shashikant P.Patole, Mohamed Farhat, Ahmed Elwakil, Hakan Bagci and Khaled N.Salama "Ferroelectric Fractional-Order Capacitors", ChemElectroChem,  20174, 2807. doi:10.1002/celc.201700663 [news and news] [cover]
  5. Agamyrat Agambayev, Shashikant P.Patole, Ahmed Elwakil, Hakan Bagci and Khaled N.Salama "Tunable fractional-order capacitor using layered ferroelectric polymers", AIP Advances 7, 095202 (2017); doi: h10.1063/1.4991659
  6. A. S. Elwakil, A. AgambayevA. Allaguie, K. N. Salama, "Experimental Demonstration of Fractional-Order Oscillators of Orders 2.6 and 2.7," Chaos, Solitons & Fractals, Vol 96, pp. 160-164,  2017 
Agamyrat Agambayev (S’15) was born in Mary, Turkmenistan, in 1992. He received the B.S. degree in physics with double majoring in electrical and electronics engineering and the M.S. degree in biomedical engineering from Fatih University, Istanbul, Turkey, in 2012 and 2014, respectively. He is currently pursuing the Ph.D. degree in electrical engineering with the King Abdullah University of Science and Technology, Thuwal, Saudi Arabia. His research interests include modeling, designing, and application of the fractional-order circuit elements.  

Tutku's first paper accepted at Sensors And Actuators B: chemical

posted Feb 1, 2019, 12:10 PM by Khaled salama



 The present study describes the one-step synthesis of NiO nanosheets and successful surface modification of NiO nanosheets with Au NPs. This surface modification step is vital for an application (i.e., hydrazine sensing), where Au NPs enhance the surface area and provide synergistic effect during the electrocatalytic reaction. Better sensing performance, good reproducibility, cyclic stability, and selectivity confirms the reliable and promising application for hydrazine detection. The excellent electrocatalytic reaction for hydrazine demonstrates that these Au NPs modified NiO nanosheets can also be applied for other sensing applications.

More details:
Rafiq Ahmad, Tutku Bedük, Sanjit Manohar Majhi and Khaled Nabil Salama, One-step synthesis and gold nanoparticle decoration of nickel oxide nanosheets for hydrazine sensing application, Sensors & Actuators: B. Chemical, accepted 2019 

New electronic device mimicking the way the brain processes information

posted Jan 22, 2019, 3:40 AM by Khaled salama   [ updated Jan 22, 2019, 3:44 AM ]

Discovery magazine highlights our recent work on a new type of capacitors, fractional capacitors, that could mimic the way the brain processes information. 
You can read more at: A broader bandwidth for electrical devices 

PhD student Agamyrat demonstrates the potential of the Fractional-Order Capacitors(FOCs) fabricated using MoS2-ferroelectric polymer composites in robust and accurate realization of various electrical systems. A molybdenum disulfide (MoS2)-ferroelectric polymer composite is used to design/fabricate a FOC. The resulting FOC's bandwidth of operation, which is defined as the frequency band where the variation in the phase angle is no more than ±4° is five decades between 100 Hz and 10 MHz, a 3 decades improvement over the best-reported state of the art. The value of the constant phase angle can be tuned by changing the type of the ferroelectric polymer in the composite and the volume ratio of MoS2
Read more :
 Agamyrat Agambayev, Mohamed Farhat, Shashikant P. Patole, Ali H. Hassan, Hakan Bagci, and Khaled N. Salama "An ultra-broadband single-component fractional-order capacitor using MoS2 ferroelectric polymer composite," Applied Physics Letters, 2018

Almansouri did it again !

posted Jan 16, 2019, 4:20 PM by Khaled salama

It's with great pleasure to announce that Abdullah won the best poster award at the MMM/Intermag conference with his poster “Super-Flexible Composite Magnet”.
Congratulations!

Thang and Azamat make their big screen debut :)

posted Jan 13, 2019, 3:22 AM by Khaled salama   [ updated Jan 22, 2019, 4:12 AM ]

KAUST Discovery just highlighted our recent work with Prof. Atif Shamim on RF enery harvesting. in an article titled "
3D-printed cube dials into energy harvesting" Ambient energy emitted by cellular phones and modems can be captured and converted into electricity using unusually shaped technology. Make sure to check the video as this also marks Thang and Azamat's big screen debut :) 

The work was accepted at the prestigious Elsevier Nano Energy journal (IF=13).  More details at: 



Congratulations Azamat and Thang and make sure to finish your PhD before heading to the silver screen.



Its worth mentioning that this work builds on our earlier work:
  1. Abdullah Almansouri, Mahmoud Ouda and  Khaled N. Salama,A CMOS RF-to- DC Power Converter with 86% Efficiency and -19.2dBm Sensitivity”, IEEE Transactions on Microwave Theory and Techniques, vol 66, no 5, pp 2409-2415, 2018 doi:10.1109/TMTT.2017.2785251
  2. Muhammad Fahad Farooqui Muhammad Akram Karimi, Khaled Nabil Salama and Atif Shamim, 3D-Printed Disposable Wireless Sensors with Integrated Microelectronics for Large Area Environmental Monitoring" Advanced Materials Technologies, 20172, 1700051 DOI: 10.1002/admt.201700051 [news] [more news]
  3. M. Ouda, W. Khalil and K.N. Salama, "Self-Biased Differential Rectifier with Enhanced Dynamic Range for Wireless Powering" IEEE Transactions on Circuits and Systems II: Express Briefs, vol. 64, no. 5, pp 515-519,  2017 doi:10.1109/TCSII.2016.2591263
  4. M. Ouda, W. Khalil and K.N. Salama, "Wide-Range Adaptive RF-to-DC Power Converter for UHF RFIDs," IEEE Microwave and Wireless Components Letters, Vol 26, no 8, pp 634 - 6362016, 2016 10.1109/LMWC.2016.2586077
  5. M. Ouda, L. Marnat, A. Shamim, K N Salama, 5.2-GHz RF Power Harvesting Module in 0.18 μm CMOS for Biomedical Implantable Sensors, IEEE Transactions on Microwave Theory and Techniques, vol 61, n 5, pp 2177-2184,  2013
  6.  L. Marnat, M. Ouda, M. Arsalan, K. Salama, A. Shamim, "On-chip implantable antennas for wireless power and data transfer in a glaucoma monitoring SoC", IEEE Antennas and Wireless Propagation Letters (AWPL), vol 11, pp 1671-1674, 2012 

    Approximate Computing is the future

    posted Jan 1, 2019, 9:18 AM by Khaled salama

    Ubiquitous computing and the ever-rising need for energy efficiency, pose challenges in terms of the processing requirements and the corresponding machine complexity. Nonetheless, the nature of the underlying applications, particularly dealing with real-world data, offers alternative paradigms towards the efficient utilization of the available design resources. PhD students Eb Li and Rawan Naous (now Dr Naous) explore approximate computing as an accommodating technique that can benefit from the inherent resilience of the current applications to build low power and low complexity architectures.

    Ren Li, Rawan Naous, Hossein Fariborzi and Khaled Nabil Salama "Approximate Computing with Stochastic Transistors’ Voltage Over-scaling," IEEE Access, 2018. doi:10.1109/ACCESS.2018.2889747
     

    Dr Sandeep's review on OFET is out

    posted Dec 8, 2018, 7:12 AM by Khaled salama   [ updated Dec 8, 2018, 9:07 AM ]




    We are excited to share our review on Organic Field Effect Transistors sensing platforms. This is Dr Sandeep's first paper with the group and more to come soon. Organic field effect transistors (OFETs) have been the focus of sensing application research over the last two decades. The challenges and possible future directions of OFET arrays in embedded sensing platforms are presented.

    More details at:
    Sandeep G.Surya, Harshil N.Raval, Rafiq Ahmad, PrashantSonar, Khaled N.Salama, V.Ramgopal Rao, Organic field effect transistors (OFETs) in environmental sensing and health monitoring: A reviewTrends in Analytical Chemistry, 2018

    Saliva-based inkjet printed glucose paper sensor

    posted Dec 3, 2018, 9:11 AM by Khaled salama   [ updated Dec 31, 2018, 3:29 AM ]

    Inexpensive and easy-to-use diagnostic tools for fast health screening are imperative, especially in the developing world, where portability and affordability are a necessity. Accurate monitoring of metabolite levels can provide useful information regarding key metabolic activities of the body and detect the concomitant irregularities such as in the case of diabetes, a worldwide chronic disease. Today, the majority of daily glucose monitoring tools rely on piercing the skin to draw blood. The pain and discomfort associated with finger pricking have created a global need to develop non-invasive, portable glucose assays. In this work, we develop a disposable analytical device which can measure physiologically relevant glucose concentrations in human saliva based on enzymatic electrochemical detection. We use inkjet-printing technology for the rapid and low-cost deposition of all the components of this glucose sensor, from the electronics to the biorecognition elements, on commercially available paper substrates.  We demonstrate that one month after its fabrication and storage in air-free environment, the sensor maintains its function with only minor performance loss. This fully printed, all-polymer biosensor with its ease of fabrication, accuracy, sensitivity and compatibility with easy-to-obtain biofluids such as saliva aids in the development of next generation low-cost, non-invasive, eco-friendly, and disposable diagnostic tools. 
    More details at:
    Eloïse Bihar, Shofarul Wustoni, Anna Maria Pappa, Khaled N. Salama, Derya Baran and Sahika Inal, A fully inkjet-printed disposable glucose sensor on papernpj Flexible Electronics10.1038/s41528-018-0044-y2, 1(2018).

    Paper sensors remove the sting of diabetic testing


    Acetone sensing made easy

    posted Nov 12, 2018, 3:40 AM by Khaled salama

    Dr Karum, Now Prof. Karum at 
    Birla Institute of Technology and Science, posed an interesting question. Can we improve the sensitivity of detection of analytes using a different transduction method?  For this purpose, interdigitated electrode (IDE)-based capacitors and quartz crystal microbalance (QCM)-based resonators were coated with a zeolitic–imidazolate framework (ZIF-8) metal–organic framework thin films as the sensing material and applied to the sensing of the volatile organic compound acetone.

    Read more at:
    Chappanda, K.N.; Tchalala, M.R.; Shekhah, O.; Surya, S.G.; Eddaoudi, M.; Salama, K.N. A Comparative Study of Interdigitated Electrode and Quartz Crystal Microbalance Transduction Techniques for Metal–Organic Framework-Based Acetone SensorsSensors 201818, 3898.

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