Sources, controls, and atmospheric behaviors of low-molecular-weight organic acids in aerosols over the western North Pacific and Chinese marginal seas.

Low-molecular-weight organic acids-formic acid (FA), acetic acid (AA), and methanesulfonic acid (MSA)-are key regulators of marine aerosol chemistry, influencing aerosol pH, cloud condensation nuclei formation, and biogeochemical cycles. Here, we report concentrations of FA, AA, and MSA in aerosols collected over the western North Pacific (October-December 2017) and Chinese marginal seas (July-August 2018). In the marginal seas, mean (±SD) concentrations of FA, AA, and MSA were 0.

Carbon monoxide cycling in the marginal sea: A case of the yellow sea and the east China sea.

This study investigated carbon monoxide (CO) dynamics in the Yellow Sea (YS) and the East China Sea (ECS) during spring, revealing significant spatial variability in surface CO concentrations (0.23-3.02 nmol L, mean 1.

Non-methane hydrocarbons in the continental seas of China: Spatiotemporal variability, controlling factors, and environmental effects.

Coastal regions, as hotspots for non-methane hydrocarbons (NMHCs) emissions, warrant more consideration for their vital impacts on marine climate regulation. This study examined the spatiotemporal distributions, emissions, and environmental effects of NMHCs in the Bohai Sea (BS) and Yellow Sea (YS) during summer and winter. The NMHC concentrations show clear spatial and seasonal variability, with higher levels observed in summer.

Dual-mode temperature monitoring using high-performance flexible thermocouple sensors based on PEDOT:PSS/CNTs and MXene/BiSe.

Due to the limited thermoelectric (TE) performance of polymer materials and the inherent rigidity of inorganic materials, developing low-cost, highly flexible, and high-performance materials for flexible thermocouple sensors (FTCSs) remains challenging. Additionally, dual-mode (contact/non-contact) temperature monitoring in FTCSs is underexplored. This study addresses these issues by using p-type (PEDOT:PSS/CNTs, 2:1) and n-type (MXene/BiSe, 2:1) TE materials applied via screen printing and compression onto a PPSN substrate (paper/PDMS/SiN₄).

Rapid cycling and emission of volatile sulfur compounds in the eastern Indian Ocean: Impact of runoff inputs and implications for balancing atmospheric carbonyl sulfide budget.

Volatile sulfur compounds, such as dimethyl sulfide (DMS), carbonyl sulfide (OCS), and carbon disulfide (CS), significantly influence atmospheric chemistry and climate change. Despite the oceans being an important source of these sulfides, the limited understanding of their biogeochemical cycles in seawater introduces considerable uncertainties in quantifying their oceanic emissions and assessing atmospheric OCS budgets. To address this issue, we conducted a comprehensive field survey in the tropical eastern Indian Ocean (EIO) to examine the spatial distributions, source-sink dynamics, and sea-air exchange fluxes of marine DMS, OCS, and CS.

Photothermal conditions and upwelling enhance very short-lived brominated halocarbons emissions in the western tropical Pacific Ocean.

Sea-to-air emissions of very short-lived brominated halocarbons (VSLBrHs) are known to contribute to 30 % of stratospheric and tropospheric ozone depletion. However, empirical data on their occurrence in open ocean are scarce, which makes it difficult to estimate the significant contribution of open ocean releases to the global budget of halocarbons. This study was conducted in 2022 to explore the spatial variations of VSLBrHs and their controlling factors in the western tropical Pacific Ocean (WTPO).

Self-powered, ultra-high detectivity and high-speed near-infrared photodetectors from stacked-layered MoSe/Si heterojunction.

Photodetectors based on high-performance, two-dimensional (2D) layered transition metal dichalcogenides (TMDCs) are limited by the synthesis of larger-area 2D TMDCs with high quality and optimized device structure. Herein, we report, for the first time, a uniform and stacked-layered MoSe film of high quality was deposited onto Si substrate by using the pulsed laser deposition technique, and then in situ constructed layered MoSe/Si 2D-3D vertical heterojunction. The resultant heterojunction showed a wide near-infrared response up to 1550 nm, with both ultra-high detectivity up to 1.

Changes in concentrations of biogenic sulfur compounds in coastal waters off Qingdao, China during an Ulva prolifera bloom.

Distributions and variations of biogenic sulfur compounds including dimethylsulfide (DMS), dissolved and total dimethylsulfoniopropionate (DMSPd and DMSPt) and acrylic acid (AA) were investigated in coastal waters off Qingdao, China during the late-bloom and after-bloom periods of the Ulva prolifera bloom of 2015. DMSPd, DMS and AA concentrations after the bloom were significantly higher than during the late-bloom, but DMSPt concentrations in surface waters began to decrease. High concentrations of these compounds in the surface layer were associated with the bloom, with the exception of increased concentrations of DMSPt in the middle layer as decaying U.

Ag nanoparticles decorated TiO2 nanotube arrays for ultrasensitive gas sensing.

Anodic TiO2 nanotube arrays have attracted extensive interests in the past decade, especially for monitoring or sensing of the gas. In this paper, an ameliorated two-step anodization process was adopted for the preparation of highly ordered and vertically aligned TiO2 nanotube arrays on the Ti metal substrate. The as-prepared TiO2 nanotube arrays were successfully decorated with uniformly distributed Ag nanoparticles through a wetting-ultraviolet radiation deoxidation technology using the AgNO3 solution as precursor and source for Ag element.