Jhonathan Prieto Rojas

Jhonathan Prieto Rojas
King Fahd University of Petroleum and Minerals | KFUPM · Department of Electrical Engineering

PhD Electrical Engineering

About

59
Publications
12,754
Reads
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1,208
Citations
Introduction
My main research focus includes novel micro- and nanofabrication techniques for energy harvesting and flexible/stretchable/wearable electronics, as well as design, development and characterization of novel structures for diverse applications.
Additional affiliations
September 2009 - present
King Abdullah University of Science and Technology
Position
  • PhD Student

Publications

Publications (59)
Article
Recently, massive events are gathering bigger crowds than ever before. During such events, minor incidents can escalate to big tragedies. Consequently, crowd monitoring and management have become an important research topic in pursuing innovative technologies that can help mitigate such risks. In this paper, a novel crowd monitoring system is fully...
Article
Research in stretchable electronics is helping to revolutionize the current electronic industry, particularly in wearable and bio-integrated devices. Cost-effectiveness and easy manufacturing are key factors that contribute to shaping the fate of such technologies. In this work, we present a fabrication method for a novel ultra-stretchable, serpent...
Article
Full-text available
Active seismic surveys, for the exploration of oil and gas reservoirs, are conducted using a huge network of geophone sensors (> 10,000) covering a very large area and interconnected using seismic cables. Such cables enable reliable operation and fast data transfer, but account for a major percentage of the survey cost and limit its flexibility. In...
Conference Paper
Nearly sixty years back when Jack Kilby built the first integrated circuit (IC), it was also the beginning of today's advanced and matured complementary metal oxide semiconductor (CMOS) technology whose arts and science of miniaturization has enabled Moore's Law to double up the number of devices in a given area in every two years. It has also been...
Article
Full-text available
A spiral interconnect array is a commonly used architecture for stretchable electronics, which accommodates large deformations during stretching. Here, we show the effect of different geometrical morphologies on the deformation behavior of the spiral island network. We use numerical modeling to calculate the stresses and strains in the spiral inter...
Article
Stretchable electronics is a rising technology, promising to replace the conventional, brittle and rigid electronics for applications that demand mechanical compliance to irregular, complex and mobile shapes. Several approaches have been proposed to find an optimum balance between electrical and mechanical characteristics. These include finding new...
Article
Full-text available
As we are advancing our world to smart living, a critical challenge is increasingly pressing - increased energy demand. While we need mega power supplies for running data centers and other emerging applications, we also need instant small-scale power supply for trillions of electronics that we are using and will use in the age of Internet of Things...
Article
Today’s state-of-the-art electronics are high performing, energy efficient, multi-functional and cost effective. However, they are also typically rigid and brittle. With the emergence of the Internet of Everything, electronic applications are expanding into previously unexplored areas, like healthcare, smart wearable artifacts, and robotics. One ma...
Article
In today's digital world, complementary metal oxide semiconductor (CMOS) technology enabled scaling of bulk mono-crystalline silicon (100) based electronics has resulted in their higher performance but with increased dynamic and off-state power consumption. Such trade-off has caused excessive heat generation which eventually drains the charge of ba...
Article
Full-text available
Flexibility can bring a new dimension to state-of-the-art electronics, such as rollable displays and integrated circuit systems being transformed into more powerful resources. Flexible electronics are typically hosted on polymeric substrates. Such substrates can be bent and rolled up, but cannot be independently fixed at the rigid perpendicular pos...
Article
Innovative solutions are paramount to the identification and development of alternative energy resources, specifically for the production of potable water. Microbial fuel cells (MFCs) are a trending emerging technology that promises green energy production while simultaneously treating wastewater. At present, several research efforts are working to...
Article
Innovative solutions are paramount to the identification and development of alternative energy resources, specifically for the production of potable water. Microbial fuel cells (MFCs) are a trending emerging technology that promises green energy production while simultaneously treating wastewater. At present, several research efforts are working to...
Conference Paper
In this report, we show the rapid assessment of black tea as potential fuel to power up nanopower systems using a microsized, simplistic and sustainable air-cathode microbial fuel cell. It was found that tea produced more power compared with traditional sodium acetate media due in part to its acidophilic pH and its higher organics content. Although...
Article
Full-text available
We show the effectiveness of wavy channel architecture for thin film transistor application for increased output current. This specific architecture allows increased width of the device by adopting a corrugated shape of the substrate without any further real estate penalty. The performance improvement is attributed not only to the increased transis...
Article
Full-text available
Current developments on enhancing our smart living experience are leveraging the increased interest for novel systems that can be compatible with foldable, wrinkled, wavy and complex geometries and surfaces, and thus become truly ubiquitous and easy to deploy. Therefore, relying on innovative structural designs we have been able to reconfigure the...
Conference Paper
In this era of strong and global push for sustainable future, researchers and technologists are focusing on enhancing clean and renewable energy solutions. However, there are still many concerns need to be addressed before renewable energy technologies become viable to be integrated into mainstream energy market. We report a novel flexible solar ce...
Conference Paper
Conventional flexible mono-crystalline silicon (Si) solar cells have a front-side contact. In this work we show innovative inter-digitated back contact for flexible mono-crystalline silicon solar cell. We also report the efficiency for different released thickness using a novel flex-Si process, which controls the thickness to reduce the required di...
Conference Paper
Today's mainstream flexible electronics research is geared towards replacing silicon either totally, by having organic devices on organic substrates, or partially, by transferring inorganic devices onto organic substrates. In this work, we present a pragmatic approach combining the desired flexibility of organic substrates and the ultra-high integr...
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Full-text available
Flexible wearable electronics have been of great interest lately for the development of innovative future technology for various interactive applications in the field of consumer electronics and advanced healthcare, offering the promise of low-cost, lightweight, and multifunctionality. In the pursuit of this trend, high mobility channel materials n...
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Full-text available
Stretchable electronic systems can play instrumental role for reconfigurable macro-electronics such as distributed sensor networks for wearable and bio-integrated electronics. Typically, polymer composite based materials and its deterministic design as interconnects are used to achieve such systems. Nonetheless, non-polymeric inorganic silicon is t...
Article
High performance flexible electronics promise innovative future technology for various interactive applications for the pursuit of low-cost, light-weight, and multi-functional devices. Thus, here we show a complementary metal oxide semiconductor (CMOS) compatible fabrication of flexible metal–oxide–semiconductor capacitors (MOSCAPs) with high-κ/met...
Article
Series arrays of Microbial Fuel Cells: MFC technology is an attractive and innovative approach for energy generation by reusing waste resources. Sustainable, membrane-less, single feeding, microsized microbial fuel cells are fabricated to quickly evaluate the power generation and viability of a series array of three MFCs as described in the Communi...
Conference Paper
With the emergence of cloud computation, we are facing the rising waves of big data. It is our time to leverage such opportunity by increasing data usage both by man and machine. We need ultra-mobile computation with high data processing speed, ultra-large memory, energy efficiency and multi-functionality. Additionally, we have to deploy energy-eff...
Conference Paper
Brain's stunning speed, energy efficiency and massive parallelism makes it the role model for upcoming high performance computation systems. Although human brain components are a million times slower than state of the art silicon industry components [1], they can perform 1016 operations per second while consuming less power than an electrical light...
Article
The brain's cortex is folded and thus can accommodate billions of neurons in an ultra-compact area. On page 2794, M. M. Hussain and co-workers demonstrate the world's first state-of-the-art non-planar 3D FinFET on flexible silicon-on-polymer using a CMOS compatible process to enable brain-architecture-inspired future ultra-high performance electron...
Article
We show that contact engineering plays an important role to extract the maximum performance from energy harvesters like microbial fuel cells (MFCs). We experimented with Schottky and Ohmic methods of fabricating contact areas on silicon in an MFC contact material study. We utilized the industry standard contact material, aluminum, as well as a meta...
Article
We report the inherent increase in capacitance per unit planar area of state-of-the art high-κ integrated metal/insulator/metal capacitors (MIMCAPs) fabricated on flexible silicon fabric with release-first process. We methodically study and show that our approach to transform bulk silicon (100) into a flexible fabric adds an inherent advantage of e...
Conference Paper
Full-text available
We report fabrication of MEMS thermal actuators on flexible and semi-transparent silicon fabric released from bulk silicon (100). We fabricated the devices first and then released the top portion of the silicon (≈ 19 μm) which is flexible and semi-transparent. We also performed chemical mechanical polishing to reuse the remaining wafer. A tested th...
Article
Flexible and transparent high performance thermoelectric energy harvesters from low cost bulk silicon wafers are fabricated using existing silicon processes on silicon (100) and then peeled off from the original substrate leaving it for reuse. As reported on page 3916 by M. M. Hussain and co-workers, the peeled off silicon has 3.6% thickness of bul...
Article
Implementation of memory on bendable substrates is an important step toward a complete and fully developed notion of mechanically flexible computational systems. In this paper, we have demonstrated a simple fabrication flow to build metal-insulator-metal capacitors, key components of dynamic random access memory, on a mechanically flexible silicon...
Article
Full-text available
State-of-the art computers need high performance transistors, which consume ultra-low power resulting in longer battery lifetime. Billions of transistors are integrated neatly using matured silicon fabrication process to maintain the performance per cost advantage. In that context, low-cost mono-crystalline bulk silicon (100) based high performance...
Conference Paper
This paper reports a generic process flow to fabricate mechanically flexible and optically semi-transparent thermoelectric generators (TEGs), micro lithium-ion batteries (μLIB) and metal-oxide-semiconductor capacitors (MOSCAPs) on mono-crystalline silicon fabric platforms from standard bulk silicon (100) wafers. All the fabricated devices show outs...
Conference Paper
Today’s information age is driven by silicon based electronics. For nearly four decades semiconductor industry has perfected the fabrication process of continuingly scaled transistor – heart of modern day electronics. In future, silicon industry will be more pervasive, whose application will range from ultra-mobile computation to bio-integrated med...
Article
Can we build a flexible and transparent truly high performance computer? High-k/metal gate stack based metal–oxide–semiconductor capacitor devices are monolithically fabricated on industry's most widely used low-cost bulk single-crystalline silicon (100) wafers and then released as continuous, mechanically flexible, optically semi-transparent and h...
Article
In pursuit of flexible computers with high performance devices, we demonstrate a generic process to fabricate 10 000 metal-oxide-semiconductor capacitors (MOSCAPs) with semiconductor industry's most advanced high-k/metal gate stacks on widely used, inexpensive bulk silicon (100) wafers and then using a combination of iso-/anisotropic etching to rel...
Conference Paper
We present a conventional micro-fabrication based thin film vertical sidewall (spacer) width controlled nano-gap fabrication process to create arrays of nanopatterns for high density precisely positioned self-assembled nanoelectronics device integration. We have used conventional optical lithography to create base structures and then silicon nitrid...
Article
Microbial fuel cells (MFCs) are an environmentally friendly method for water purification and self-sustained electricity generation using microorganisms. Microsized MFCs can also be a useful power source for lab-on-a-chip and similar integrated devices. We fabricated a 1.25 μL microsized MFC containing an anode of vertically aligned, forest type mu...
Article
For the first time, we present a simple process to fabricate a thin (>5Lim), mechanically flexible, optically transparent, porous mono-crystalline silicon substrate. Relying only on reactive ion etching steps, we are able to controllably peel off a thin layer of the original substrate. This scheme is cost favorable as it uses a low-cost silicon waf...
Article
We introduce the concept of a silicon nanotube field effect transistor whose unique core-shell gate stacks help achieve full volume inversion by giving a surge in minority carrier concentration in the near vicinity of the ultrathin channel and at the same time rapid roll-off at the source and drain junctions constituting velocity saturation-induced...
Article
In today's world, consumer driven technology wants more portable electronic gadgets to be developed, and the next big thing in line is self-powered handheld devices. Therefore to reduce the power consumption as well as to supply sufficient power to run those devices, several critical technical challenges need to be overcome: a. Nanofabrication of m...