Structural and optical properties of Fe3O4@Au/rGO nanocomposites synthesized by hydrothermal method and their photothermal effect under NIR laser irradiation

Near-Infrared Laser Irradiation-Modulated High-Temperature Solid-Contact Ion-Selective Electrodes: Potentiometric Detection of Ca2+ in Seawater

“…Figure a shows the schematic diagram of NIR laser irradiation on the solid-contact Ca 2+ -ISE, where the NIR laser beam is introduced across the sample solution and the ion-selective membrane to stimulate a DMC-based solid contact to generate heat (Figure a). The temperature of the ion-selective membrane and the thin-layer sample solution near the surface of the electrode would be raised through thermal diffusion, while the bulk sample solution is still kept at room temperature, due to the fact that water would not absorb the NIR light . This phenomenon can be observed by an infrared thermal imager (Figure S2).…”

“…The temperature of the ion-selective membrane and the thin-layer sample solution near the surface of the electrode would be raised through thermal diffusion, while the bulk sample solution is still kept at room temperature, due to the fact that water would not absorb the NIR light. 26 This phenomenon can be observed by an infrared thermal imager (Figure S2). As shown in Figure 1b, there is a noticeable rise in the temperature when the NIR laser beam irradiates on the GC/DMC/Ca 2+ -ISE.…”

“…In recent years, the photothermal effects of nanomaterials under nearinfrared region (NIR) laser irradiation have attracted much attention in the field of photothermal therapy 24 and biomedical imaging, 25 due to the fact that NIR laser irradiation can stimulate the nanomaterials to generate heat by absorbing the incident light. 26 It is also reported that carbon-based nanomaterials, such as carbon nanotubes, graphene, and mesoporous carbon, have high photothermal conversion capabilities and can convert NIR light into heat. 27,28 On the other hand, it is known that carbon-based nanomaterials are promising ion-to-electron transducers for fabrication of the solid-contact ISEs.…”

“…Laser heating is one of the thermal modulation techniques for investigating the electrochemical kinetic processes and determining standard entropy changes of ions. − However, most of the laser lights for thermal modulation are used with ultraviolet and visible wavelengths, ,, which may bring some undesired effects during the measurements of ISEs, such as decomposition of the polymeric membrane components and formation of unknown compounds as side products. In recent years, the photothermal effects of nanomaterials under near-infrared region (NIR) laser irradiation have attracted much attention in the field of photothermal therapy and biomedical imaging, due to the fact that NIR laser irradiation can stimulate the nanomaterials to generate heat by absorbing the incident light . It is also reported that carbon-based nanomaterials, such as carbon nanotubes, graphene, and mesoporous carbon, have high photothermal conversion capabilities and can convert NIR light into heat. , On the other hand, it is known that carbon-based nanomaterials are promising ion-to-electron transducers for fabrication of the solid-contact ISEs. − However, most of these studies focus on the investigation of the ion-to-electron transducing performance of carbon-based nanomaterials in terms of the potential stability and reproducibility of solid-contact ISEs at room temperature.…”

Effects of Bacillus sp. MR‐1/2 and magnetite nanoparticles on yield improvement of rice by urea fertilizer under different watering regimes

“…Iron oxide magnetite nanoparticles (MNPs) have attracted numerous applications in the field of food science, sensors, adsorbent, catalysis, data storage, electronic devices, environment, engineering, drug-delivery technology, biomedical research, magnetic recording devices, etc. (Ardakani et al 2020). In agriculture, nanoparticles are recommended to be used as additives for their contribution in nutrient use efficiency, seed germination and plant growth.…”