Chip on Sands, Fortaleza, Brazil

posted Sep 13, 2017, 3:57 AM by Khaled salama   [ updated Sep 13, 2017, 4:02 AM ]

A team from KAUST, Professor Khaled Salama (CEMSE), Jose Sales Filho (Visiting Brazilian Student), Alexander Yee (Strategic Recruitment Specialist), attended the Chip on Sands at Fortaleza Brazil. The main purpose was to promote awareness about KAUST and the research opportunities that exist. Prof. Salama gave an invited talk on integrated sensors at the conference.
The Chip in is a series of events that started in 2000 with the Chip in the Jungle, in the State of Amazon, Brazil.  It is the largest conference in Microelectronics in South America, annually held in Brazil. The conference goal is to bring together managers, leading researchers from academia and industry, and students to present and discuss relevant issues related to the major Microelectronics research and development areas.

Capacitors with no phase limitation

posted Sep 12, 2017, 3:19 AM by Khaled salama   [ updated Sep 12, 2017, 3:22 AM ]

Doctoral student Agamyrat Agambayev continues his excellent work to develop fractional order capacitors (FOCs) with controllable phase. In this new work, we show that 
P(VDF)-based polymers with bilayer structures are used to fabricate PCB compatible FOCs. A simple solution using the drop cast approach to form the layers facilitates the manipulation of the effective dielectric properties. Our approach ultimately controls the FOCs’ CPAs between -65° to -83°. More details can be found at:
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


The hunt for rapid early cancer detection

posted Aug 26, 2017, 8:25 AM by Khaled salama   [ updated Aug 26, 2017, 8:26 AM ]

An in vitro diagnostic, biosensor-CMOS platform was developed to screen and quantify SSAT enzyme for rapid early detection of cancer, which dramatically improves the survival rate of cancer patients. A large sensing area with small baseline capacitance was introduced to implement a capacitive biosensor that shows a high sensitivity to SSAT enzyme concentrations. 
PhD Student Abdulaziz Alhoshany developed a successive readout circuit incorporating a clocked inverter-based SAR architecture was introduced to read and process the information from the biosensor.  The diagnostic platform can be miniaturized into a complete microsystem in a compact size by integrating the sensing electrode and the associated readout circuit in a single tiny package. Therefore, the miniaturized device can be produced in low-cost, small size, and mass-production technology compared to state of the art.  You can read all about it at:
Alhoshany, A.; Sivashankar, S.; Mashraei, Y.; Omran, H.; Salama, K.N. A Biosensor-CMOS Platform and Integrated Readout Circuit in 0.18-μm CMOS Technology for Cancer Biomarker DetectionSensors 201717, 1942.

A 1ppm Ammonia sensor demonstrated

posted Aug 18, 2017, 4:54 AM by Khaled salama

We continue our fruitful collaboration with Prof Eddaoudi and report a MOF based ammonia sensor exhibiting excellent performance for simulated breathing system in the presence of a mixture of humidity and carbon dioxide.  The sensor can detect NH3 at concentrations down to 1ppm with a detection limit of 100ppb at room temperature. 
More details can be found at:
Ayalew Assen, Omar YASSINE, Osama Shekhah, Mohamed Eddaoudi, and Khaled Salama,"MOFs for the Sensitive Detection of Ammonia: Deployment of fcu-MOF Thin-Films as Effective Chemical Capacitive Sensors." ACS sensors, accepted 2017.

Fractional capacitors made easy thanks to Agamyrat

posted Aug 17, 2017, 1:00 AM by Khaled salama

Today we celebrate our 100th journal paper. PhD student Agamyrat demonstrated a new simple yet effective realization of fractional capacitors using Poly(vinylidene fluoride)-based polymers and their blends. We can precisely tune the constant phase angle of the resulting fractional order capacitor by changing the blend composition. The structural composition of the fabricated blends is investigated by using Fourier transform infrared spectroscopy and X-ray diffraction techniques. We would like to thank the Saudi Basic Industries Corporation (SABIC) for funding this work under Grant No. RGC/3/2385-01. More details at: Agamyrat Agambayev, Shashikant P.Patole, Mohamed Farhat, Ahmed Elwakil, Hakan Bagci and Khaled N.Salama "Tunable Ferroelectric Fractional-Order Capacitors", ChemElectroChem, accepted 2017

This work builds on our highly cited work on realization of electrostatic, micro scale, compact fractional capacitors using reduced graphene oxide percolated polymer composites. The work was partially funded by Saudi BasicIndustries Corporation (SABIC) under Grant No. 2000000015. To learn more about this, you are invited to check our U.S. patent  9,305,706 and read the paper, Microscale Electrostatic Fractional Capacitors using Reduced Graphene Oxide Percolated Polymer Composites, that was published in the leading physics venue Applied Physics Letters.

Visiting Student Research Program

posted Aug 5, 2017, 4:29 AM by Khaled salama

All you need to know about VSRP

Working hard in the lab, we think !

posted Aug 1, 2017, 8:09 AM by Khaled salama   [ updated Aug 1, 2017, 8:10 AM ]

This summer High school student Mohammed Aljughaiman is visiting our lab working on gas and humidity sensors. Who said hard work cant be fun. This wouldnt happen without the dedication of Dr. karumbaiah Nanaiah

Interns join our lab for summer

posted Jul 4, 2017, 11:31 PM by Khaled salama   [ updated Jul 5, 2017, 5:01 AM ]

We are happy to welcome two more students to our lab this summer. So far we have a mix of undergraduate and masters students from all over t he world.  Currently they come from Saudi (4), Vietnam (2), Kazakhstan (2), Egypt (1), Brazil (1) and China (1). The latest are:

Ali Hassan (Student Member, IEEE) received the B.Sc. degree from the Electronics and Communications Engineering Department, Cairo University, Giza, Egypt, in 2014. 
He is currently a M.Sc. student at the Electronics and Communications Engineering Department, Cairo University, Giza, Egypt. His research interests include low-power and high-performance circuit design for deep-submicron CMOS technologies, emerging new technologies, neural recording/stimulation systems; optical neural stimulators; low-power/high-performance ADCs/DACs; low-power sensor readout circuits; low-power analog-merged signal circuits; power management systems and circuits; energy harvesting systems; internet of things (IoT); ultra-low power transceivers.

 Tran Minh Thong is a third-year student at the Ho Chi Minh University of Technology, Vietnam. He's interested in embedded 
system and the realistic application of embedded in life. He's here for the internship focusing on stochastic computing. His work at 
KAUST is in collaboration with Dr. Cuong Pham-Quoc at the Department Computer Science & Engineering, Ho Chi Minh University of Technology, Vietnam.

Effat interns

posted Jul 4, 2017, 9:04 AM by Khaled salama   [ updated Jul 25, 2017, 12:11 AM ]

We are glad to welcome Esraa Fakeih, Sarah Basyouni and Bashaier Al Hassani in our lab for the summer.  We have a group of smart energetic students who bring a lot of skills and value to our lab.

Fractals once again :)

posted Jun 26, 2017, 11:00 AM by Khaled salama   [ updated Aug 17, 2017, 12:45 AM ]

Fractal capacitors aren't just beautiful geometrical shapes, they have plenty of Electronic advantages. In this work with prof. Hussam Alshareef, we report the first ever fractal micro-supercapacitors with 32% enhancement in energy density compared to conventional interdigital structures. The origin of this improvement can be attributed to the increased number of electrical lines of force in the fractal electrodes, which is caused by several open-edge segments. This study shows that electrode fractal design is a viable strategy for improving the performance of integrated micro-supercapacitors that use thin-film electrodes at no extra processing or fabrication cost. More details can be checked at:
Mrinal K. Hota, Qiu Jiang, Yousof Mashraei, Khaled N. Salama, and Husam N. Alshareef, Fractal ElectrochemicalMicrosupercapacitors, Advanced  Electronic Materials, 2017 DOI: 10.1002/aelm.201700185

At KAUST we have demonstrated fractals in a variety of applications:
  1. Yousof Mashraei, Shilpa Sivashankar, Ulrich Buttner, Khaled Nabil Salama, Integration of Fractal Biosensor in a Digital Microfluidic Platform, IEEE sensors jounal,  Vol 16, no 24, pp 8775 - 8783, 2016 (10.1109/JSEN.2016.2578440) (invited as top paper from sensors 2015 conference)
  2. A. M. Elshurafa, A.G. Radwan, P. H. Ho, M. Ouda and K. N. Salama "Low Voltage Puzzle-Like Fractal  MEMS Variable Capacitors Suppressing Pull-in" IET micro and nano letters, vol. 7, no. 9, pp. 965-969, 2012. 
  3.  Amro Elshurafa and Khaled N Salama, "A Differential RF MEMS Interwoven Capacitor Immune to Residual Stress Warping," IET Micro and Nano letters, Volume 7, issue 7, pp 658-661, July 2012  (IEEE top 10 accessed article August 2012)
  4. Amro Elshurafa and Khaled N Salama, "Two-layer RF MEMS fractal capacitors in PolyMUMPS for S-band applications," IET Micro & Nano letters, vol 7, no 5, pp. 419-421, May 2012. (IEEE top 10 accessed article june 2012)
  5. Amro Elshuarafa, Ahamed G Radwan, Ahmed Emira and Khaled N Salama,"RF MEMS Fractal Capacitors with High Self Resonant Frequencies ", IEEE Journal of Microelectromechanical Systems (JMEMS), vol 21, no 1, 10-12, 2012 (top 10 accessed article march 2012)
  6. F. Ghaffar, M. Umair, K. N. Salama, A. Shamim “ 24GHz LTCC based fractal antenna array with integrated lens for SOP Design”, IEEE Antennas and Wireless Propagation letters (AWPL), Vol 10, pages 705-708, 2011.

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