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”.

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.

    Fully Funded Internship Opportunities

    posted Sep 30, 2018, 12:53 PM by Khaled salama

    KAUST offers a variety of programs to attract students worldwide to spend some time at our labs.
    Exceptional internship opportunities for (3-6 months): 
    A Microelectronics winter camp (4 weeks):
    Photonics summer camp (4 weeks): 
    Winter Enrichment poster competition (1 week): 

    Dr Rafiq's first paper with the group

    posted Sep 30, 2018, 8:59 AM by Khaled salama   [ updated Sep 30, 2018, 9:02 AM ]

    We are excited to share our review on nanomaterial deposition for biosensor fabrication. This is Dr Rafiq's first paper with the group and more to come soon. The review address the following Nanomaterial deposition methods on electrode surface :
        1. Coating based methods 
        2. Direct deposition-based methods
        3. Printing based methods
        4. Direct-growth 
    The reviewers were impressed by the work and commented "The authors do an outstanding job of including the rationale for each approach, the advantages and the shortcomings. They also take clear stands concerning what does NOT work—I really like that! This review will be a very useful addition to the literature and helpful to investigators and students trying to decide how to improve the performance of the electrode-based biosensors. "
    More at:  Rafiq Ahmad⁠, Otto S. Wolfbeis⁠, Yoon-Bong Hahn⁠, Husam N. Alshareef⁠, Luisa Torsi⁠ and Khaled N. Salama⁠ "Deposition of nanomaterials: A crucial step in biosensor fabrication," Materials Today Communications, 2018 doi:10.1016/j.mtcomm.2018.09.024

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