Article
Engineering, Electrical & Electronic
Onur Burak Ozdemir, Ali Gelir, Sedat Ozdemir, Omer F. Kadi, Sinem N. Seyhan, Kadir B. Yildirim
Summary: The study reveals that the absorption properties of glucose in polyacrylamide hydrogel differ from those in water due to the interactions with other molecules in the matrix, indicating a change in the spectral properties of the molecules.
OPTICAL AND QUANTUM ELECTRONICS
(2023)
Article
Chemistry, Analytical
Jiale Zhang, Caizhi Lv, Chaoting Shi, Jinhua Feng, Lan Wu
Summary: In this study, OV-HAp with abundant oxygen vacancies (OVs) were prepared by calcining carbonate-doped HAp (CHAp), and the effects of calcination temperature, time, and atmosphere on the formation of OVs in OV-HAp and its photoelectrochemical properties were investigated in detail. The results showed that the calcination temperature and atmosphere play a significant role in the generation of OVs in OV-HAp. OV-HAp-H-2, obtained by calcining CHAp at 600 degrees C for 5 h under H-2 atmosphere, exhibited the highest efficiency (65.4%) for tetracycline photocatalytic degradation. This work provides a theoretical and technical basis for the development of HAp-based high-efficient photocatalysts and opens a new path for online spectral monitoring and kinetic study of photocatalytic degradation of organic pollutants.
MICROCHEMICAL JOURNAL
(2023)
Article
Biotechnology & Applied Microbiology
Shital Kandel, William Querido, Jessica M. M. Falcon, Hannah M. M. Zlotnick, Ryan C. C. Locke, Brendan Stoeckl, Jay M. M. Patel, Chetan A. A. Patil, Robert L. L. Mauck, Nancy Pleshko
Summary: This study investigated the use of visible-near infrared spectroscopy for objective assessment of cartilage repair, revealing significant differences in the visible spectral region but less pronounced differences in the near infrared region. These findings support further research on visible spectral region for longitudinal evaluation of cartilage defect repair.
FRONTIERS IN BIOENGINEERING AND BIOTECHNOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Stefanie Dengler, Bernd Eberle
Summary: In recent years, boron nitride nanomaterials have gained attention for their unique properties, but little research has been done on their optical limiting behavior. This study comprehensively investigates the nonlinear optical response of dispersed boron nitride nanotubes, nanoplatelets, and nanoparticles. The results show that nonlinear scattering dominates the optical limiting performance of these materials, with boron nitride nanotubes exhibiting a stronger effect than carbon nanotubes, making them promising for laser protection applications.
Article
Instruments & Instrumentation
Nicolas Francos, Gila Notesco, Eyal Ben-Dor
Summary: The study demonstrates that using reflectance data across the 2000-2450 nm spectral region can satisfactorily estimate quartz content relative to clay minerals in the soil using hyperspectral remote sensing means.
APPLIED SPECTROSCOPY
(2021)
Article
Engineering, Chemical
Alexandre Deguine, Denis Petitprez, Lieven Clarisse, Lise Deschutter, Karen Fontijn, Herve Herbin
Summary: Volcanic eruptions release large amounts of ash into the atmosphere, impacting infrastructure, human health, agriculture, and air traffic. Remote sensing instruments can detect ash plumes and provide valuable information on ash's physical characteristics. The complex refractive index (CRI) is a key parameter in satellite retrievals but remains uncertain. This study presents experimental data on the CRI of volcanic ash and explores its sensitivity to chemical composition and mineralogical structure.
JOURNAL OF AEROSOL SCIENCE
(2023)
Article
Chemistry, Inorganic & Nuclear
Yongcheng Huo, Hao Cai, Yuhe Shao, Zhen Song, Quanlin Liu
Summary: In this work, Yb3+ luminescence, responsive to visible light, is achieved by utilizing energy transfer from Cr3+ in Mg2GeO4. The introduction of Yb3+ leads to intense NIR luminescence peaking at 974 nm. The preferential occupation of Yb3+ ions and the energy transfer process in Mg2GeO4 are investigated through local structure analysis. The potential application of Mg2GeO4:Cr3+, Yb3+ as thermometers is demonstrated based on the properties of thermally coupled anti-Stokes and Stokes emissions of Yb3+, and the sensitive variation of the emission intensity.
INORGANIC CHEMISTRY
(2023)
Article
Environmental Sciences
Kuijun Wu, Jianjun Guo, Zihao Zhang, Huiliang Zhang, Juan Li, Faquan Li, Weiwei He
Summary: A new spectral calibration method is proposed in this paper to improve the measurement accuracy of SO2 cameras, especially for the long-distance detection of optically thick plumes.
Article
Optics
Yinsen Luan, Di Mei, Shengxian Shi
Summary: This method proposes a light-field multi-spectral radiation thermometry based on an unfocused light-field camera, which can simultaneously record directions and intensities of incident rays, and demonstrates accurate surface temperature measurement can be achieved with a single lens, single monochromatic image sensor, and just one snapshot.
Article
Materials Science, Multidisciplinary
Xiancheng Nie, Jiajun Du, Wenhuan Huang, Tao Wang, Xiao Wang, Biao Chen, Xuepeng Zhang, Guoqing Zhang
Summary: Organic room-temperature phosphorescent (RTP) materials play an important role in optical imaging and sensing technologies. However, the excitation requirements and potential photo damage limit their practical applications. In this study, a new design concept using dihydroxy-functionalized naphthalenediimide (NDI) is demonstrated to achieve visible light absorption and near-infrared RTP. The resulting polymer NDI-PLA2/NDI-PCL2 exhibits long lifetimes and offers potential for expanding to other molecular RTP systems.
ADVANCED OPTICAL MATERIALS
(2022)
Article
Chemistry, Physical
Yuxin Liu, Feixue Gao, Shuya Liu, Hangxi Liu, Ming Fang, Xiaoli Tan
Summary: In this study, CdTe nanoparticles were found to be capable of photo-reducing Cr(VI) to Cr(III) under infrared light irradiation, providing a new pathway for Cr(VI) photoreduction in wastewater under visible-NIR light irradiation. This research has potential applications as a photocatalyst in the infrared light range and offers new insights for pollution reduction and environmental improvement.
APPLIED SURFACE SCIENCE
(2023)
Article
Environmental Sciences
Caroline C. Womack, Katherine M. Manfred, Nicholas L. Wagner, Gabriela Adler, Alessandro Franchin, Kara D. Lamb, Ann M. Middlebrook, Joshua P. Schwarz, Charles A. Brock, Steven S. Brown, Rebecca A. Washenfelder
Summary: The study used an enhanced spectrometer to retrieve the optical properties of biomass burning aerosol, demonstrating high sensitivity of the technique to constrain the optical properties of brown carbon aerosol but presenting challenges for fresh smoke dominated by black carbon aerosol. The accuracy of Mie theory retrievals decreases as the fraction of black carbon mass increases.
ATMOSPHERIC CHEMISTRY AND PHYSICS
(2021)
Review
Chemistry, Multidisciplinary
Huijuan Chen, Weijie Chen, Yan Lin, Yuan Xie, Sheng Hua Liu, Jun Yin
Summary: The development of visible and near-infrared light activated azo switches is crucial for overcoming the limitation of UV light-induced damage to surfaces in functional azo-based materials. This review provides a summary of various molecular design strategies for driving the isomerization of azo derivatives with visible light and near-infrared light.
CHINESE CHEMICAL LETTERS
(2021)
Article
Biochemistry & Molecular Biology
Aleksandra Orzechowska, Martin Trtilek, Krzysztof Michal Tokarz, Renata Szymanska, Ewa Niewiadomska, Piotr Rozpadek, Katarzyna Wator
Summary: A non-destructive thermal imaging method was used to study the stomatal response of salt-treated Arabidopsis thaliana plants to excessive light. The study found that saline-induced impairment in stomatal movement caused reduced stomatal conductance and transpiration rate, and thermal imaging technique can be useful for analyzing stomatal aperture and movement under dynamic environmental conditions.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2021)
Article
Physics, Condensed Matter
Bharathi Raj Muthu, Dhandapani Vaithiyanathan, Anuj K. Sharma
Summary: This paper presents a photodetector (PD) design based on SiO2 substrate, Au nanoparticles (NPs), and reduced graphene oxide (rGO) thin layer, which achieves plasmonic enhancement of light absorption in the visible spectral range. The simulation results show that a surrounding medium with a higher refractive index leads to greater absorption with plasmonic enhancement, resulting in higher values of quantum efficiency (eta) and responsivity (rho). The proposed PD design operates at 654.52 nm and provides eta and rho values as large as 0.527 and 0.278 A/W, respectively. Furthermore, a practical implementation of the PD design is analyzed with Au electrodes and rGO as a conducting layer. The analysis includes estimation of dark current (Idark), evaluation of detectivity (D), and detectable power (Pd). The SiO2-rGO-Au NPs structure achieves Idark, D, and Pd values of 6.33 x 10-14 A, 1.36 x 1011 Jones, and 2.28 x 10-13 W, respectively. Moreover, compared to recently-reported PD designs in the visible range, the proposed PD design provides superior performance with small Idark and large values of D and rho.
SOLID STATE COMMUNICATIONS
(2023)
Article
Multidisciplinary Sciences
Emlyn J. Davies, Sunnje L. Basedow, David McKee
Summary: This study examines the relevant size ranges for determining the optical properties of the ocean, suggesting that millimeter-sized particles like zooplankton and fish eggs may significantly contribute to absorption and scattering of seawater. Existing in situ instruments may not effectively capture the impact of such large particles, potentially overlooking their optical significance.
SCIENTIFIC REPORTS
(2021)
Article
Optics
Geir Johnsen, Artur Zolich, Stephen Grant, Rune Bjorgum, Jonathan H. Cohen, David McKee, Tomasz P. Kopec, Daniel Vogedes, Jorgen Berge
Summary: This study provides a complete annual time series of light data from the Arctic using a camera system, analyzing the dynamics of irradiance and its relation to weather conditions, sun and moon trajectories.
Article
Limnology
Ina Kostakis, Michael Twardowski, Collin Roesler, Ruediger Roettgers, Dariusz Stramski, David McKee, Alberto Tonizzo, Susan Drapeau
Summary: This study focuses on finding suitable methods for measuring hyperspectral absorption coefficients in complex coastal waters, evaluating both discrete sample and in situ methods, and quantifying the measurement uncertainties and relative accuracies of each method. Results showed strong agreements between different discrete sample methods, while in situ methods exhibited higher variability.
LIMNOLOGY AND OCEANOGRAPHY-METHODS
(2021)
Article
Engineering, Environmental
Giulia Castellani, Gaelle Veyssiere, Michael Karcher, Julienne Stroeve, S. Neil Banas, A. Heather Bouman, S. Andrew Brierley, Stacey Connan, Finlo Cottier, Fabian Grosse, Laura Hobbs, Christian Katlein, Bonnie Light, David McKee, Andrew Orkney, Roland Proud, Vibe Schourup-Kristensen
Summary: The Arctic marine ecosystem is heavily influenced by the seasonality of light, which affects its ecological balance. Climate change is predicted to cause future changes in under-ice light, with potential implications for ecosystems.
Article
Environmental Sciences
Madjid Hadjal, Encarni Medina-Lopez, Jinchang Ren, Alejandro Gallego, David McKee
Summary: This paper demonstrates the retrieval of chlorophyll-a using artificial neural networks in the northwest European shelf seas. The neural networks improve performance and data availability compared to current algorithms, providing a solution for atmospheric correction in coastal waters. The approach also generates pixel-specific estimates of uncertainty in the final product.
Article
Biology
N. Soren Haefker, Stacey Connan-McGinty, Laura Hobbs, David McKee, Jonathan H. Cohen, Kim S. Last
Summary: Animal behavior is influenced by the day/night cycle and animals themselves modify the light environment through their movement. Investigating the light environment experienced by zooplankton undergoing diel vertical migration in an Arctic fjord provides insights into how animal behavior shapes the realized diel light niche (RDLN).
COMMUNICATIONS BIOLOGY
(2022)
Article
Meteorology & Atmospheric Sciences
Stacey Connan-McGinty, Neil S. Banas, Jorgen Berge, Finlo Cottier, Stephen Grant, Geir Johnsen, Tomasz P. Kopec, Marie Porter, David McKee
Summary: Arctic marine ecosystems are greatly affected by the extreme seasonal light changes, and accurate determination of light is crucial for understanding the dynamics of animal and aquatic algae populations. This study presents a model that accurately calculates the spectrally resolved underwater light in ice-free conditions in the Barents Sea, and demonstrates its validity throughout the year, including the Polar Night period.
JOURNAL OF ADVANCES IN MODELING EARTH SYSTEMS
(2022)
Article
Environmental Sciences
Ivan J. Cautain, Kim S. Last, David McKee, Bodil A. Bluhm, Paul E. Renaud, Amanda F. Ziegler, Bhavani E. Narayanaswamy
Summary: This study investigates the assimilation of sympagic organic material (OM) by benthic organisms in the Arctic shelves and its variation with seasonal sea ice duration. The results show that sympagic OM can constitute a significant fraction of benthic diets and its assimilation is strongly correlated with sea ice cover duration. The importance of sympagic OM is more evident in the summer compared to winter, and its availability and patchiness play a role in carbon supply for Barents Sea benthos.
FRONTIERS IN MARINE SCIENCE
(2022)
Article
Optics
Stephen Grant, Geir Johnsen, David Mckee, Artur Zolich, Jonathan H. Cohen
Summary: The ArcLight observatory provides continuous time series of all-sky images and spectral irradiance data in the Arctic. They show variations in the RGB proportions of irradiance throughout the year, with the blue part showing the greatest variation. The study also demonstrates the biological impact of these spectral variations on the photoreceptor response.
Article
Environmental Sciences
Cait L. L. McCarry, Suennje L. Basedow, Emlyn J. J. Davies, David McKee
Summary: This study uses standardized ocean color imagery and radiative transfer modeling to identify reflectance anomalies potentially caused by surface swarms of Calanus finmarchicus in the northern Norwegian Sea. The results show high anomaly within the 'red' patch, indicating the presence of something other than the standard bio-optical model constituents. Optical closure is achieved through the addition of C. finmarchicus absorption into the model. The analysis suggests the potential for the over-estimation of chlorophyll concentrations if C. finmarchicus populations are present in the surface waters.
Article
Optics
Bernhard Schartmuller, Philip Anderson, David Mckee, Stacey Connan-Mcginty, Tomasz P. Kopec, Malin Daase, Geir Johnsen, Jorgen Berge
Summary: The optical chain and logger (OptiCAL) is an autonomous ice-tethered observatory equipped with multiple light sensors for mapping the variation of light with depth. It can cover a high dynamic range of under-ice light levels and produce realistic values compared to modeled surface irradiance. The raised light levels at specific depths associated with nearby leads in the ice highlight the importance of depth-resolved light measurements.
Article
Astronomy & Astrophysics
M. Lo Prejato, D. McKee
Summary: A spectral deconvolution model (SDM) is introduced for estimating the concentrations of chlorophyll, colored dissolved organic material (CDOM), and non-biogenic mineral suspended solids (MSS) in water. The SDM utilizes spectral information to estimate these parameters and shows better performance and adaptability compared to other methods.
EARTH AND SPACE SCIENCE
(2023)
Article
Environmental Sciences
T. J. Smyth, A. E. Wright, A. Edwards-Jones, D. McKee, A. Queiros, O. Rendon, S. Tidau, T. W. Davies
Summary: Half of globally significant megacities are located near the coast, posing multiple stressors to urban marine ecosystems. Artificial light at night (ALAN) pollution, in addition to other well recognized sources, has not been quantified adequately in marine ecosystems.
ELEMENTA-SCIENCE OF THE ANTHROPOCENE
(2022)
Article
Geosciences, Multidisciplinary
Andre Valente, Shubha Sathyendranath, Vanda Brotas, Steve Groom, Michael Grant, Thomas Jackson, Andrei Chuprin, Malcolm Taberner, Ruth Airs, David Antoine, Robert Arnone, William M. Balch, Kathryn Barker, Ray Barlow, Simon Belanger, Jean-Francois Berthon, Yngve Borsheim, Astrid Bracher, Vittorio Brando, Robert J. W. Brewin, Elisabetta Canuti, Francisco P. Chavez, Andres Cianca, Herve Claustre, Lesley Clementson, Richard Crout, Afonso Ferreira, Scott Freeman, Robert Frouin, Carlos Garcia-Soto, Stuart W. Gibb, Ralf Goericke, Richard Gould, Nathalie Guillocheau, Stanford B. Hooker, Chuamin Hu, Mati Kahru, Milton Kampel, Holger Klein, Susanne Kratzer, Raphael Kudela, Jesus Ledesma, Steven Lohrenz, Hubert Loisel, Antonio Mannino, Victor Martinez-Vicente, Patricia Matrai, David McKee, Brian G. Mitchell, Tiffany Moisan, Enrique Montes, Frank Muller-Karger, Aimee Neeley, Michael Novak, Leonie O'Dowd, Michael Ondrusek, Trevor Platt, Alex J. Poulton, Michel Repecaud, Rudiger Roettgers, Thomas Schroeder, Timothy Smyth, Denise Smythe-Wright, Heidi M. Sosik, Crystal Thomas, Rob Thomas, Gavin Tilstone, Andreia Tracana, Michael Twardowski, Vincenzo Vellucci, Kenneth Voss, Jeremy Werdell, Marcel Wernand, Bozena Wojtasiewicz, Simon Wright, Giuseppe Zibordi, Sukru Besiktepe
Summary: This article presents a global in situ data set for validating ocean colour products. The data set includes various observation variables and has undergone homogenization, quality control, and merging processes.
EARTH SYSTEM SCIENCE DATA
(2022)
Article
Environmental Sciences
T. J. Smyth, A. E. Wright, D. McKee, S. Tidau, R. Tamir, Z. Dubinsky, D. Iluz, T. W. Davies
Summary: The global prevalence of artificial light at night (ALAN) in underwater marine ecosystems remains unknown, but a global atlas has been created to reveal the extent and impact of this light pollution. The study found that coastal areas and regions with intensive offshore development and urbanization are most heavily affected by ALAN, leading to biological responses in marine organisms.
ELEMENTA-SCIENCE OF THE ANTHROPOCENE
(2021)
