NanoTechnology: Materials, Processes & Devices

Research that includes:

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

BPN776: Wearable Electronic Tape

Hiroki Ota
Kevin Chen

We demonstrate a high-performance wearable piezoelectric electronic-tape (E-tape) for motion sensing based on a carbon nanotube (CNT)/silver nanoparticle (AgNP) composite encased in PDMS and VHB flexible thin films. E-tape sensors directly attached to human skin exhibit fast and accurate electric response to bending and stretching movements which induce change in conductivity with high sensitivity. Furthermore, E-tape sensors for a wide range of applications can be realized by the combination of controlling the concentration of AgNPs in the CNT network and designing appropriate...

BPN736: Design and Fabrication of High Performance Supercapacitors

Roseanne H. Warren

This work presents the first demonstration of atomic layer deposition (ALD) ruthenium oxide (RuO2) and its conformal coating onto vertically aligned carbon nanotube (CNT) forests as supercapacitor electrodes. Specific accomplishments include: (1) successful demonstration of ALD RuO2 deposition, (2) uniform coating of RuO2 on a vertically aligned CNT forest, and (3) an ultra-high specific capacitance of 100 mF/cm2 from prototype electrodes with a scan rate of 100 mV/s. Advantages of the ALD method include precise control of the RuO2 layer thickness and composition without the use of...

BPN798: Hyper Wideband-Enabled RF Messaging (HERMES)


The goal of the hyper-wideband enabled RF messaging (HERMES) project is to investigate advanced micro- systems and techniques for jam-resistant radio frequency (RF) communications. Hyper wideband (HWB) code division multiple access (CDMA) offers many unprecedented benefits for RF communications, including robust resistance to jamming and inference signals, and large coding gain for high data rate communications. Current challenges with implementing such HWB CDMA are the complexity and high power consumption of electrically based systems, particularly the receivers that are suitable...

BPN797: Synthesis and Friction Characteristics of Gecko-Inspired Adhesives

Hai Liu
JuKyung Choi
Gina Zaghi

Geckos have a remarkable ability to stick to and climb almost any type of surface using micro- and nanoscale foot- hairs, which allow conformal contact against any counter-surface and thus, maximize the interfacial interaction. With the goal of mimicking the high adhesion and friction capability of geckos, we have fabricated ordered polymeric nano-fiber arrays of various soft and hard polymers, including low-density polyethylene and cyclic olefin polymers. In order to provide a useful reference for optimum high performance conditions, the effects of fiber geometry (diameter and...

BPN841: Fast-Response Silver Passive Temperature Sensor via Electro-Hydrodynamic (EHD) Printing Method

Hyung-Seok Jang

Electro-Hydrodynamic (EHD) Printing based direct write method has been demonstrated that the efficient fabrication process for the fast-response and super-thin silver (Ag) passive temperature sensor. For the direct write Ag passive temperature sensor, biological polymer was applied for efficient Ag nanostructure formation, and the EHD Printer directly eject and deposit this Ag precursor ink on the substrate. During annealing process this Ag passive sensor rapidly produce the 2D nanoparticles from the air/water interface and directly sintered to Ag thin film patterns in 200oC. This...

BPN762: Microheater-Based Platform for Low Power Combustible Gas Sensing

Anna Harley-Trochimczyk

Accurate detection of flammable gases is essential for safe operation of many industrial processes. Installing networks of combustible gas monitors in industrial settings can allow for rapid leak detection and increased safety and environmental protection. However, existing combustible gas monitors are not suitable for use in wireless sensor networks due to the high power consumption. We have developed an ultra-low power combustible gas sensor with competitive sensitivity and lifetime characteristics that will enable ubiquitous wireless monitoring of combustible gases in industrial...

BPN819: Hybrid Porous Nanowire Arrays for High Energy Supercapacitor

Sinem Ortaboy

Recently, silicon-based supercapacitors have received considerable attention for application in mobile and remote sensing platforms due to their unique properties such as high surface area, low cost, long lifetimes, and excellent charge–discharge capability. These promising energy storage devices store more energy than conventional dielectric capacitors and deliver higher power with longer cycle life than available battery technologies. Recent studies in the field of supercapacitors have focused on the realization of hybrid materials to further improve the energy density of...

BPN694: Monolayer Semiconductor Devices

Matin Amani

Transition metal dichalcogenides (TMDCs) have the potential to be used in the future generation of electronic and optoelectronic devices due to their superior material properties compared to the conventional semiconductors. Although many proof of concept devices have been shown using TMDCs, the presence of large contact resistances are still a fundamental challenge to be able to realize the full potential of this material family in the functional devices. In this work, we study defect engineering by using a mild H2 plasma treatment to create defects in the WSe2 lattice. Material...

BPN827: Metal Oxide-decorated Silicon Carbide Nanowires Electrode for The Applications on Electrochemical Energy Storage

Chuan-Pei Lee
Steven DelaCruz

Since the discovery of electricity, we are looking for promising methods to store that energy for use on demand. In the energy storage industry, electrochemical water splitting is a well-established technology to convert electricity into chemical energy, addressing the issues of effective storage and transport. On the other hand, electrochemical capacitors, namely supercapacitors, have also attracted much attention for electrical energy storage because of their feature of both high power density and energy density. In this work, we are developing processes for the synthesis of metal...

BPN832: Gold-Mediated Exfoliation of Ultralarge Optoelectronically-Perfect Monolayers

Sujay B. Desai
Mark Hettick

Gold-mediated exfoliation of ultralarge optoelectronically perfect monolayers with lateral dimensions up to ≈500 μm is reported. Electrical, optical, and X-ray photo­electron spectroscopy characterization show that the quality of the gold- exfoliated flakes is similar to that of tape- exfoliated flakes. Large-area flakes allow manufacturing of large-area mono­layer transition metal dichalcogenide electronics. Further work involves automating and mechanizing the transfer process for more controlled exfoliation and transfer of TMDC monolayers onto desired substrates.