| All displays consist of a lattice of tiny dots of light, called pixels, the brightness of which can be individually controlled. The total number of pixels—and therefore, the resolution and display size—is limited by how many of these pixels can be addressed within a given fraction of a second. Therefore, display manufacturers try to use in the pixel control units materials that exhibit a very high “electron mobility”, which is a measure for how quickly current will start to flow through such a control unit as a response to voltage being applied—and thus, how “quick” the pixel is. | |
| A new material called “ITZO” (for its constituent elements indium, tin, zinc and oxygen) promises to be up to seven times faster than the current state-of-the-art material. However, it has not been clear where this improvement comes from, hampering its adoption for industrial applications. | |
| Hokkaido University material scientist Hiromichi Ohta and his team used their unique measurement technique to clarify this point. In their recent paper published in the journal Applied Electronic Materials (“Thermopower Modulation Analyses of High-Mobility Transparent Amorphous Oxide Semiconductor Thin-Film Transistors”), they showed that the higher electron mobility results from the unusual fact that in ITZO films of sufficient thickness, free charges accumulate at the interface with the carrier material and thus enable passing-through electrons to travel through the bulk of the material unhindered. |
| The unique ability of the group around Ohta comes down to a very simple formula: The electron mobility is proportional to the free travel time of the charge carriers—electrons in this case—divided by their effective mass. And while the measurement of the electron mobility itself is a relatively standard technique, effective mass and free travel time cannot be measured as easily, and therefore it is difficult to tell what factor is responsible for the electron mobility. | |
| But by measuring how the electric field inside the material changes in response to an applied magnetic field as well as to a temperature gradient, Ohta’s team could deduce the effective mass of the electrons—and then calculate the free travel time, as well. | |
| It turns out that both the effective mass is significantly smaller than in current state-of-the-art materials and the free travel time is much higher and, therefore, both factors contribute to the higher electron mobility. | |
| In addition, by observing how their results depend on the thickness of the ITZO material, they could deduce how interface and bulk of the material contribute to these effects. | |
| Ohta explains the significance of this analysis: “Using the knowledge we gained from this study, we may in the future design other transparent oxide semiconductor thin-film transistors with different chemical compositions that exhibit even better electron mobility properties.” Thus, this study is a major step towards the next generation of ultra high-resolution displays. |
News
Our books now available worldwide!
Online Sellers other than Amazon, Routledge, and IOPP Indigo Global Health Care Equivalency in the Age of Nanotechnology, Nanomedicine and Artifcial Intelligence Global Health Care Equivalency In The Age Of Nanotechnology, Nanomedicine And Artificial [...]
Unzipping the Code of Life: Scientists Pinpoint Where DNA First Opens
Researchers mapped where DNA first opens and how a helicase gate may release one strand as genome copying begins. Before a cell can divide, it must open its tightly wound DNA and begin copying the entire [...]
Scientists Tested an 8-Hour Eating Window and Found a Surprising Brain Benefit
Limiting the daily eating window may provide brain benefits beyond those associated with weight loss. Eating within a shorter daily window may provide cognitive benefits beyond those associated with weight loss alone, according to [...]
Focused Ultrasound Opens Blood-Brain Barrier to Treat Brain Cancer
Summary: A new study demonstrates that primary brain tumors (gliomas) are particularly receptive to targeted drug delivery using focused ultrasound (FUS) combined with microbubbles. The team developed a high-resolution MRI protocol to track blood-brain barrier [...]
AI’s promise and practical limits in drug discovery
AI tools are becoming increasingly common in early drug discovery, allowing scientists to analyse data and navigate large volumes of research. However, according to Dr Raminderpal Singh, turning that potential into consistent scientific workflows [...]
GHCE Concept
From the preface of the book Global Health Care Equivalency in the Age of Nanotechnology, Nanomedicine and Artificial Intelligence, Edited by Frank Boehm: Since the publication of my first book (Nanomedical Device and Systems [...]
Healthcare Headlines: Challenges and Advances in 2026
Health-related updates reveal financial adjustments by Universal Health Services due to Medicaid reimbursement uncertainties, significant pollution-linked health concerns from French-British oil firm Perenco in Congo, drug trial setbacks, potential restructuring at major medical firms, [...]
Scientists Discover the Brain Protein That Helps Alzheimer’s Spread Through the Brain
Scientists have identified a brain protein that may help Alzheimer’s spread, revealing a potential new target for slowing the disease’s progression. Alzheimer’s disease is closely linked to the accumulation of a toxic form of the protein [...]
How Immune Dysregulation Contributes to Psychiatric Disorders
Introduction Growing evidence suggests that disruptions in immune function may play an important role in the development and progression of psychiatric disorders. However, immune mechanisms probably contribute more strongly in some patients than others, [...]
Electrostatic Discharge Boosts Triboelectric Nanogenerator Current and Enables DC Output
Controlled electrical discharges could enable triboelectric nanogenerators to achieve higher peak currents, extending nano-enabled energy harvesting into chemical processing and self-powered sensing. Paper: Electrostatic discharge as a breakthrough strategy for triboelectric nanogenerators. A new review [...]
Swiss laboratory uses old drugs against rare diseases
Researchers at the University of Geneva are combing through collections of approved drugs to find new therapies for rare diseases – with some success. This approach is gaining traction around the world, while pharmaceutical [...]
Nanozyme Aptasensors Show Promise for Faster Food, Health, and Environmental Testing
By pairing robust artificial enzymes with highly selective aptamers, nanozyme aptasensors could help detect disease biomarkers, pathogens, and contaminants faster, but the review shows that real-world deployment still depends on overcoming matrix interference, biofouling, [...]
Paralyzed Man Feels Sensation Again With Brain Stimulation Device
Aneuroprosthetic system has allowed a man with paralysis to grasp and lift objects and feel touch again. The device helped 42-year-old Keith Thomas of Massapequa, New York, who was paralyzed from the chest down [...]
Global Cancer Cases Could Surge 67% by 2050, New Report Warns
New data reveal major geographic disparities and highlight the urgent need for global action on prevention, early detection, and equitable access to treatment. For roughly one in five people worldwide, cancer will become part [...]
A Deadly Ebola-Like Virus Is Spreading. Are We Ready?
BU virologist Nancy Sullivan says the Bundibugyo outbreak in the Democratic Republic of the Congo underscores the need for broader outbreak preparedness. The death of a nurse marked the moment health officials recognized that [...]
Why Most Animal Viruses Never Become Human Pandemics
From receptor mismatch to risky human-animal interfaces, this article explains why spillover is common but true pandemic emergence remains rare. Introduction Humans are constantly exposed to animal viruses through farming, wildlife contact, and the [...]
