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Gul Hassan
I am Gul Hassan, I hail from Orakzai Agency, Pakistan, one of the most beautiful and mystique places in the country. I was the curious one in siblings from my early childhood, more of a nerd. The curiosity led me to study in best college of the area. Once I obtained my 10th grade and 12th grade qualification from Al Asar Academy Usretzai Payan Kohat, I opted to travel far south and join Dawood Engineering College Karachi, partly to satisfy my thirst for knowledge and partly to expand my thinking horizon by travelling. This happened to be the milestone which change my life and pushed me to pursue a path of research. I was fascinated by the power of miniscule electronic circuits and devices. I was amazed by their potential as game changing technologies. I also saw the recent boom of printed technologies with amazement and keenness. I have developed a deep interest for printed electronics. I wanted to work on electronic circuits which are smart and miniscule and which can be easily printed. I wanted to work on circuits for signal processing, to help pave a path for the merger of these two extremely useful technological domains. I believe that by designing miniature printed circuits and devices which have signal processing abilities too, we can potentially revolutionize sensor technology. So to realize my dreams, I joined the Jeju National University for PhD Master leading to PhD. Here in this university I targeted different parts of the printed devices and systems. The research is mainly focus on flexible electronic devices, so that it will be easy to mount on any desire surfaces. In recent, wearable and printed electronic devices have got tremendous attention because it is highly desirable for the next-generation technologies and customized applications. Printed electronics have the potential to revolutionize the spread of electronic applications and can be easily interfaced with Human machine interface HMI devices and systems. We addresses the solution processed based flexible printed devices and sensors through all printed techniques. Materials are processed and synthesized to make it printable trough printed techniques for the realization of electronic devices and sensor which is also called Solution processed electronic devices. These devices are flexible and can be mounting on any desire surfaces, and can be customized according to our needs. To realize these devices in real life applications, different fabrication methods are utilized. In our research we utilize Ink-jet materials printer DMP-300, spin coater and electro hydrodynamic EHD. All these methods are easy to use and have many advantages as single step fabrication, can be operate at room temperature and no materials waste. Using the above mentions printing methods, different parts of the printed devices are targeted such as humidity sensors, strain sensors, cut able sensors, biosensors, memristors, transparent electrodes, and nanogenerators for self powered systems. In my work, different flexible substrates such as PDMS, PET, polyurethane and biomaterials are used according to manufacturing processes and their desire for targeted applications. The fabricated devices and sensors were tested for their electrical, optical, chemical, structural and mechanical behavior to conform and verify the solution processed based device fabrication approach. For the printed sensor application we fabricated humidity and stain sensor using Graphene, Methyl red and Zinc Oxide materials. The humidity sensor has fast response ~1S and recovery time 2S with wide detection margin of 0 to 85 % RH. The inter-digital electrodes were used and optimized for the high sensitivity and accuracy. The strain sensor can be stretch upto 30 % with optimized 0.34 surface roughness of PDMS substrate. As the system needs memory to store data, so we fabricated the non-volatile memristor using PEDOT: PSS, Methyl Red, PVP, Zinc Oxide ZnO, F8BT, ZrO2, TPD, PTAA and TiO2 and also optimized the memristor design and materials for high OFF/ON ratio, long retention time, high stability and endurance cycles. All printed electronic devices need flexible and transparent electrode, so we design and optimize the flexible and transparent electrodes through all printed technology. The aim mainly includes improving transparency, stability to high current and flexibility. In last, we design and optimized the hybrid nanogenerator for self powered printed electronics devices and systems. So combinly, this research opens a way to next-generation printed and flexible electronic technologies and customized applications and systems. In the future, I want to continue my research in the same above filed. I happen to know about the desire Post, and I knew it has everything to offer I want. It has an amazing work environment, which is friendly and professional along with all the necessary facilities of research. I would be grateful if you give me the opportunity to prove my worth for the Research. With best regards Gul Hassan [email protected] +82-1091438786
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