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Semiconducting frameworks possessing porous structure are promising platforms for the detection of hazardous gas molecules. In this study, we propose a facile route to fabricate millimeter-scale, three-dimensional semiconducting SWCNT (s-SWCNT) aerogels and demonstrate deactivation of the co-existing metallic SWCNT (m-SWCNT) network via electrical breakdown process. In particular, the on-off ratio of the modulated semiconducting aerogel after the electrical breakdown process was 205, which is an increase of 18.9 times over that before the process. The modulated semiconducting SWCNT aerogels with a large specific surface area (∼1270 m g) demonstrated their applicability for highly sensitive ppb-level ozone detection. The modulated semiconducting networks led to a 1310 % increase in the magnitude of response to 30-ppb ozone gas injection compared with that of pristine SWCNT aerogels. Furthermore, the prepared aerogels could detect 3 ppb of ozone within 40 s and retain stable reversible ozone detection for 200 cyclic operations over 100 h. Thus, the proposed semiconducting SWCNT aerogels are a promising candidate for highly sensitive environmental gas sensors.
This article was published in the following journal.
Name: Journal of hazardous materials
Benefiting from their extraordinary physical properties, methylammonium lead halide perovskites (PVKs) have attracted significant attention in optoelectronics. However, the PVK-based devices suffer fr...
Multi-millimeter-tall vertically-aligned single-wall carbon nanotube (VA-SWCNT) forests were grown using Fe/Gd/AlO catalyst with high initial growth rate of ~2 μm s and long catalyst lifetime of ~70 ...
Solution-processed networks of semiconducting, single-walled carbon nanotubes (SWCNTs) have attracted considerable attention as materials for next-generation electronic devices and circuits. However, ...
The specific recognition between DNA and single-walled carbon nanotube (SWCNT) has enabled wide applications, especially in the chiral sorting of SWCNT. However, the molecular recognition mechanism ha...
Carbon aerogels (CAs) with 3D interconnected networks hold promise for application in areas such as pollutant treatment, energy storage, and electrocatalysis. In spite of this, it remains challenging ...
The aim of the study was to test whether the exposure to electromagnetic millimeter waves - Millimeter Wave Therapy (MWT) is effective for relief of acute postoperative pain in patients af...
This is a research study of a novel, "breast-dedicated" positron emission tomography (PET) camera with 1 millimeter spatial resolution. The main goal of the study is for the personnel to u...
Lack of depth perception and spatial orientation are drawbacks of laparoscopic surgery. The advent of the three-dimensional (3D) camera system enables surgeons to regain binocular vision. ...
Compare the remineralizing effect of acidulated fluoride gel Flugel (1.23% FFA, DFL) and acidulated Fluoride Foam Flúor Care (1.23% FFA, FGM) in maxillary anterior permanent teeth of 58 c...
This study aims to compare the effects of Negative-Pressure Wound Therapy and wet-to-dry dressing on Stages 3 and 4 pressure injuries, and to investigate the consistency of Three-Dimension...
Echocardiography amplified by the addition of depth to the conventional two-dimensional ECHOCARDIOGRAPHY visualizing only the length and width of the heart. Three-dimensional ultrasound imaging was first described in 1961 but its application to echocardiography did not take place until 1974. (Mayo Clin Proc 1993;68:221-40)
A scale comprising 18 symptom constructs chosen to represent relatively independent dimensions of manifest psychopathology. The initial intended use was to provide more efficient assessment of treatment response in clinical psychopharmacology research; however, the scale was readily adapted to other uses. (From Hersen, M. and Bellack, A.S., Dictionary of Behavioral Assessment Techniques, p. 87)
The process of generating three-dimensional images by electronic, photographic, or other methods. For example, three-dimensional images can be generated by assembling multiple tomographic images with the aid of a computer, while photographic 3-D images (HOLOGRAPHY) can be made by exposing film to the interference pattern created when two laser light sources shine on an object.
A subjective psychometric response scale used to measure distinct behavioral or physiological phenomena based on linear numerical gradient or yes/no alternatives.
Three-dimensional computed tomographic imaging with the added dimension of time, to follow motion during imaging.