Metasurfaces are 2D artificial materials consisting of arrays of metamolecules, which are
exquisitely designed to manipulate light in terms of amplitude, phase, and polarization state …

Abstract By alloying GaN with AlN the emission of AlGaN light-emitting diodes can be tuned
to cover almost the entire ultraviolet spectral range (210–400 nm), making ultraviolet light …

Methane (CH 4) is a greenhouse gas as well as being flammable and explosive. In this
manuscript, quartz-enhanced photoacoustic spectroscopy (QEPAS) and heterodyne QEPAS …

The development of real-time and sensitive humidity sensors is in great demand from smart
home automation and modern public health. We hereby proposed an ultrafast and full-color …

Sensors are perhaps the most important and integral components of our modern society.
With global warming and environmental pollution garnering ever-increasing attention, as …

In recent years, sensitive, selective and accurate sensing techniques for ammonia gas
detection have been highly demanded since ammonia is both a commonly utilized gas in …

Wearable biosensors have received tremendous attention over the past decade owing to
their great potential in predictive analytics and treatment toward personalized medicine …

While numerous types of gas sensors have been developed for various industries and
applications such as the automotive industry, environmental monitoring, and personal …

With the demanding detection of unique toxic gas, semiconductor gas sensors have
attracted tremendous attention due to their intriguing features, such as, high sensitivity …

Non-dispersive infrared (NDIR) spectroscopy analyzes the concentration of target gases
based on their characteristic infrared absorption. In conventional NDIR gas sensors, an …