NanoTechnology: Materials, Processes & Devices

Research that includes:

  • Development of nanostructure fabrication technology
  • Nanomagnetics, Microphotonics
  • CMOS Integrated Nanowires/Nanotubes (CMOS-Inn)

BPN860: Laser Printed Carbide-Graphene for Paper Electronics

Yu Long
Minsong Wei
Renxiao Xu
Junwen Zhong
Peisheng He
Fanping Sui

Paper electronics have attracted researchers’ attention in recent years for its potential advantage of disposability, foldability, low density and low cost. In our previous studies, we have shown a drastically different approach by a direct-write laser patterning process on paper to realize various basic device applications, such as a foldable triboelectricity generator and a folded supercapacitor as the potential paper-based power source for paper electronics, a wireless...

BPN856: Broadly-Tunable Laser with Self-Imaging Three-Branch Multi-Mode Interferometer

Guan-Lin Su

Tunable lasers with high side-mode suppression ratios (SMSRs) are cost-effective solutions to replace multiple DFB lasers in wavelength-division multiplexing (WDM) systems. Two arm interference-based devices, such as C3- and Y-branch lasers, have advantages over grating- and ring-resonator-based counterparts in terms of cost and fabrication complexities; however, it is fundamentally difficult to achieve high SMSRs and wide tuning ranges simultaneously. In our proposed...

BPN928: Black Phosphorous Based Infrared Light Emitting Diodes

Niharika Gupta

Two-dimensional (2D) materials such as MoS2 and black phosphorous (bP) have shown promise for high performance optoelectronic and electronic applications, due to their naturally terminated surfaces. Unlike the majority of 2D materials, which are only direct bandgap at the monolayer limit, bP maintains a direct bandgap for all thickness, which ranges from 1.4 to 0.3 eV. This property can be leveraged to demonstrate light emitting diodes (LEDs) based on bP/MoS2 heterostructures. High EQE can be...

BPN909: High Quality Synthetic Monolayer Semiconductor

Hyungjin Kim

In recent years, there have been tremendous advancement in the growth of monolayer transition metal dichalcogenides (TMDCs) by chemical vapor deposition (CVD). However, obtaining high photoluminescence quantum yield (PL QY), which is the key figure of merit for optoelectronics, is still challenging in the grown monolayers. Specifically, the as-grown monolayers often exhibit lower PL QY than their mechanically exfoliated counterparts. In this work, we demonstrate synthetic tungsten diselenide (WSe2)...

BPN932: A Fully Integrated and Self-Powered Smartwatch for Continuous Sweat Glucose Monitoring

Jiangqi Zhao
Yuanjing Lin

Wearable devices for health monitoring and fitness management have foreseen a rapidly expanding market, especially those for noninvasive and continuous measurements with real-time display that provide practical convenience and eliminated safety/infection risks. Herein, a self- powered and fully integrated smartwatch that consists of flexible photovoltaic cells and rechargeable batteries in form of a “watch strap”, electrochemical glucose sensors, customized circuits and display units integrated into a “dial” platform, is...

BPN942: Metal-organic Frameworks with Three-dimensional Ordered Superstructures as Plasmonic Sensing Materials

Zhou Li
Adrian Davey
Aifei Pan

Assembly of particles into long-range, three-dimensional (3D), ordered superstructures is crucial for the design of a variety of materials including plasmonic sensing materials. Spherical colloidal particles (mainly silica or polymers such as polystyrene and acrylates) have traditionally been used to build assembled superstructures. Recently, great progress has also been achieved in the assembly of spherical and polyhedral inorganic-based particles. However, this progress has not led to the use of other families of purely organic or hybrid metal-organic...

BPN937: Nanoplasmonic PCR-based Rapid Precision Molecular Diagnostic Chip

Youngseop Lee
Wonseok Kim

Emerging molecular diagnosis requires ultrafast polymerase chain reaction (PCR) on chip for rapid precise detection of infectious diseases, neurodegenerative diseases, cardiovascular diseases, or cancers. Here we report nanoplasmonic PCR-based rapid precision molecular diagnostic chip. The nanoplasmonic pillar arrays (NAPA) comprise gold nanoislands on the top and sidewall of large-scale glass nanopillar arrays. The nanoplasmonic pillars enhance light absorption of a white light- emitting diode (LED) over the whole visible range due to strong...

BPN929: Electrochemical Sensors with Reduced Drift and Enhanced Stability

Yuanjing Lin

Development of reliable glucose sensors for noninvasive monitoring without interruption or limiting users’ mobility is highly desirable, especially for diabetes diagnostic which requires routine/long term monitoring. However, their applications are largely limited by the relatively poor stability. Herein, a porous membrane is synthesized for effective enzymes immobilization and it is robustly anchored to the modified nanotextured electrode solid contacts, so as to realize glucose sensors with significantly enhanced sensing stability and mechanical robustness....

BPN888: Large-Area Processing of Monolayer Semiconductors for Lighting Applications

Der-Hsien Lien

Transition-metal dichalcogenide monolayers have naturally terminated surfaces and can exhibit a near-unity photoluminescence quantum yield in the presence of suitable defect passivation. To date, steady-state monolayer light-emitting devices suffer from Schottky contacts or require complex heterostructures. We demonstrate a transient-mode electroluminescent device based on transition-metal dichalcogenide monolayers (MoS2, WS2, MoSe2, and WSe2) to overcome these problems. Electroluminescence from this dopant-free two- terminal device is obtained by...

BPN954: Quantum Dots Based High-performance Gas Sensors

Sikai Zhao

In recent years, the demands for high-performance gas sensors are rapidly increasing in many fields including environmental monitoring, public health and security, medical diagnostics, and industrial process monitoring. Among various types of gas sensors, the resistive metal-oxide-semiconductors (MOS) are very attractive and widely applied due to their high sensitivity, low cost, facile operation, and high compatibility with microfabrication processes. The working principle of such gas sensors is based on the reversible changes in the sensor’s resistance caused by the gas adsorption and...