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One critical factor for bolometer sensitivity is efficient electromagnetic heating of thermistor materials, which plasmonic nanogap structures can provide through the electric field enhancement. In this report, using finite element method simulation, electromagnetic heating of nanorod dimer antennas with a nanogap filled with vanadium dioxide (VO) was studied for long-wavelength infrared detection. Because VO is a thermistor material, the electrical resistance between the two dimer ends depends on the dimer's temperature. The simulation results show that, due to the high heating ability of the nanogap, the temperature rise is several times higher than expected from the areal coverage. This excellent performance is observed over various nanorod lengths and gap widths, ensuring wavelength tunability and ultrafast operating speed, thereby making the dimer structures a promising candidate for high sensitivity bolometers.
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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8342706 | PMC |
http://dx.doi.org/10.1038/s41598-021-95429-1 | DOI Listing |
Apoptosis
December 2024
Department of Oncology, The Third Affiliated Hospital of Soochow University, Changzhou, Jiangsu, 213003, China.
5-Fluorouracil (5-FU) is one of the most common chemotherapeutic agents for colorectal cancer (CRC), but its application is often limited by resistance. Tripartite motif containing 23 (TRIM23) has been reported to be dysregulated in various tumors and involved in tumor progression and chemotherapy resistance. However, its relationship with CRC 5-FU resistance and the underlying mechanism are still unclear.
View Article and Find Full Text PDFJ Echocardiogr
December 2024
Department of Radiology, The Jikei University School of Medicine, 3-25-8 Nishi-Shimbashi, Minato-Ku, Tokyo, 105-8461, Japan.
Background: The current guidelines recommend patient stratification based on transthoracic echocardiography (TTE) to identify individuals with potential pulmonary hypertension (PH). We validated the relationship between PH and the pulmonary artery diameter (PAD) on computed tomography (CT) with peak tricuspid regurgitant velocity (TRV) measured by TTE for referral of patients with suspected PH for TTE screening.
Methods: We performed a retrospective analysis of CT-based PAD of 2356 patients who underwent TTE from February 2, 2013 to December 25, 2019 at our institution.
Plant Biol (Stuttg)
December 2024
Department of Silviculture and Forest Ecology of the Temperate Zones, University of Göttingen, Göttingen, Germany.
Temperate mixed forests are currently experiencing severe drought conditions and face increased risk of degradation. However, it remains unclear how critical tree physiological functions such as sap flow density (SFD) and tree water deficit (TWD, defined as reversible stem shrinkage when water is depleted), respond to extreme environmental conditions and how they interact under dry conditions. We monitored SFD and TWD of three co-occurring European tree species (Fagus sylvatica, Fraxinus excelsior and Acer pseudoplatanus) in dry conditions, using high temporal resolution sap flow, dendrometer, and environmental measurements.
View Article and Find Full Text PDFAnal Chem
December 2024
Department of Chemistry, Wuhan University, Wuhan 430072, China.
MicroRNAs (miRNAs) regulate a myriad of biological processes and thus have been regarded as useful biomarkers in biomedical research and clinical diagnosis. The specific and highly sensitive detection of miRNAs is of significant importance. Herein, a sensitive and rapid dual-amplification elemental labeling single-particle inductively coupled plasma-mass spectrometry (spICP-MS) analytical method based on strand displacement amplification (SDA) and CRISPR/Cas12a was developed for miRNA-21 detection.
View Article and Find Full Text PDFFront Public Health
December 2024
Department of Nursing, Harbin Medical University, Harbin, China.
Objective: This study investigates the factors influencing sedentary behavior in older adult Chinese stroke patients using decision trees and logistic regression models.
Methods: Convenience sampling method was employed to enroll 346 respondents aged ≥60 years with stroke from the Department of Neurology of three tertiary-level A hospitals in Heilongjiang province, based on the inclusion criteria. The Sedentary Behavior Questionnaire for Older Adults, the International Physical Activity Questionnaire Short Form (IPAQ-S), the Pittsburgh Sleep Quality Index (PSQI), the Self-Rating Depression Scale (SDS), and the Social Support Scale (SSRS) were used to assess sedentary behavior, physical activity level, sleep quality, depressive symptoms, and social support, respectively.
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