2 research outputs found
Synthesis of Nanograined ZnO Nanowires and Their Enhanced Gas Sensing Properties
Polycrystalline ZnO nanowires with grain sizes ranging
from 20
to 100 nm were synthesized using a newly designed two-step process:
(first step) synthesis of ZnSe nanowires by vapor transportation of
a mixture of ZnSe powders; and (second step) thermal oxidation of
the ZnSe nanowires at 650 °C. Compared to the single-crystal
ZnO nanowire gas sensors and other nanomaterial gas sensors reported
previously, the multiple networked nanowire gas sensors fabricated
from the nanograined ZnO nanowires showed substantially enhanced electrical
responses to NO<sub>2</sub> gas at 300 °C. The NO<sub>2</sub> gas sensing properties of the nanograined ZnO nanowires increased
dramatically with increasing NO<sub>2</sub> concentration. The multiple-networked
nanograined ZnO nanowire sensor showed a response value of 237,263%
at 10 ppm NO<sub>2</sub> and 300 °C, whereas the single-crystal
ZnO nanowire sensors showed a response of only 6.5% under the same
conditions. The recovery time of the nanograined ZnO nanowire sensor
was much shorter than that of the normal ZnO nanowire sensor over
the NO<sub>2</sub> concentration range of 1–10 ppm, even though
the response time of the former was somewhat longer than that of the
latter. The origin of the enhanced NO<sub>2</sub> gas sensing properties
of the nanograined ZnO nanowire sensor is discussed
MOESM1 of Establishment and characterization of 6 novel patient-derived primary pancreatic ductal adenocarcinoma cell lines from Korean pancreatic cancer patients
Additional file 1: Figure S1. TP53 histogram of AMCPAC cell lines