With the emerging trend of big data and internet of things, silicon (Si) photonics technology
has been developed and applied for high‐bandwidth data transmission. Contributed by the …

III-nitride semiconductors are promising optoelectronic and electronic materials and have
been extensively investigated in the past decades. New functionalities, such as …

A miniature mid-infrared photoacoustic (PA) gas sensor with a chamber volume of
approximately 73 μL for detection of dissolved gases in seawater was presented. This …

Scandium-doped aluminum nitride (AlScN) has generated great research interest owing to
its unique properties. The wurtzite-structure AlScN is compatible with the complementary …

Compared to the gas sensors of electrochemical and semiconductors, the non-dispersive
infrared technique (NDIR) can selectively detect multiple types of gases due to the …

We report an open-path and anti-pollution multi-pass cell based tunable diode laser
absorption spectroscopy (TDLAS) sensor, which was designed for online measurement of …

Monitoring wide-range carbon dioxide (CO2) levels with superior sensing performance is
extremely important for environmental, human health, safety, and space applications. The …

The coronavirus disease (COVID-19) outbreak has turned the world upside down bringing
about a massive impact on society due to enforced measures such as the curtailment of …

Chemiresistive CO 2 sensing is attractive due to low cost and ease of chip-level integration.
Our previous studies (Yong **a, 2021) showed the well-developed ZnO material fabricated …

Carbon dioxide (CO 2) is a colorless and odorless gas. The imbalanced CO 2
concentrations can have detrimental effects, therefore numerous CO 2 gas sensors have …