440 citations · 917 across the 9 of their papers we have counts for
9 papers
Flexible and Transparent All-Graphene Circuits for Quaternary Digital Modulations
Seunghyun Lee, Kyunghoon Lee, Chang-Hua Liu +2
In modern communication system, modulation is a key function that embeds the baseband signal (information) into a carrier wave so that it can be successfully broadcasted through a…
Evidence for Extraction of Photoexcited Hot Carriers from Graphene
Chang-Hua Liu, Nanditha M. Dissanayake, Seunghyun Lee +2
We report evidence of nonequilibrium hot carriers extraction from graphene by gate-dependent photocurrent study. Scanning photocurrent excited by femtosecond pulse laser shows unus…
Homogeneous bilayer graphene film based flexible transparent conductor
Seunghyun Lee, Kyunghoon Lee, Chang-Hua Liu +1
Graphene is considered a promising candidate to replace conventional transparent conductors due to its low opacity, high carrier mobility and flexible structure. Multi-layer graphe…
Ultrafast photocurrent measurement of the escape time of electrons and holes from carbon nanotube PN junction photodiodes
Nathaniel M. Gabor, Zhaohui Zhong, Ken Bosnick +1
Ultrafast photocurrent measurements are performed on individual carbon nanotube PN junction photodiodes. The photocurrent response to sub-picosecond pulses separated by a variable…
Parametric amplification in single-walled carbon nanotube nanoelectromechanical resonators
Chung-Chiang Wu, Zhaohui Zhong
The low quality factor (Q) of Single-walled carbon nanotube (SWNT) resonators has limited their sensitivity in sensing application. To this end, we employ the technique of parametr…
A Fully Tunable Single-Walled Carbon Nanotube Diode
Chang-Hua Liu, Chung-Chiang Wu, Zhaohui Zhong
We demonstrate a fully tunable diode structure utilizing a fully suspended single-walled carbon nanotube (SWNT). The diode's turn-on voltage under forward bias can be continuously…
Wafer Scale Homogeneous Bilayer Graphene Films by Chemical Vapor Deposition
Seunghyun Lee, Kyunghoon Lee, Zhaohui Zhong
The discovery of electric field induced bandgap opening in bilayer graphene opens new door for making semiconducting graphene without aggressive size scaling or using expensive sub…
Capacitive Spring Softening in Single-Walled Carbon Nanotube Nanoelectromechanical Resonators
Chung Chiang Wu, Zhaohui Zhong
We report the capacitive spring softening effect observed in single-walled carbon nanotube (SWNT) nanoelectromechanical (NEM) resonators. The nanotube resonators adopt dual-gate co…
Coherent Single Charge Transport in Molecular-Scale Silicon Nanowire Transistors
Zhaohui Zhong, Ying Fang, Wei Lu +1
We report low-temperature electrical transport studies of molecule-scale silicon nanowires. Individual nanowires exhibit well-defined Coulomb blockade oscillations characteristic o…