High-Aspect-Ratio In2–x Ga x O3 Integrated with Amorphous Al2O3 Nanofibers: All-Inorganic Self-Supporting Wearable Membranes for Ultralow-Concentration NO Sensing in Simulated Exhalation
Achieving high flexibility, breathability, and sensitivity in inorganic semiconductor gas sensors remains a substantial challenge, especially for wearable applications in high-humidity environments. This study develops a hyper-flexible, thermally stable, and highly breathable full-inorganic, self-su...
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Veröffentlicht in: | Nano letters 2025-01, Vol.25 (2), p.845-853 |
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creator | Liu, Yumeng Liu, Jia Jia, Shuangju Yu, Qian Zhang, Min Lu, Hongbing Zhang, Jinniu Gao, Jianzhi Zhu, Benpeng |
description | Achieving high flexibility, breathability, and sensitivity in inorganic semiconductor gas sensors remains a substantial challenge, especially for wearable applications in high-humidity environments. This study develops a hyper-flexible, thermally stable, and highly breathable full-inorganic, self-supporting In2–x Ga x O3–Al2O3/Al2O3 nanofiber membrane sensor, fabricated using a dual-spinneret electrospinning method with an interlocking design. This innovative sensor has a bilayer structure with an amorphous Al2O3 nanofiber substrate layer supporting an active layer of high-aspect-ratio interwoven In2–x Ga x O3 and Al2O3 nanofibers, providing outstanding flexibility, elevated breathability, and strong thermal stability. Owing to low-concentration Ga3+ doping and its nanofiber-built self-supporting porous design, the In1.98Ga0.02O3–Al2O3/Al2O3 sensor demonstrates excellent sensitivity, selectivity, and cycling stability for detecting ultralow-concentration NO biomarker (≈15 ppb) under simulated breath conditions, without performance deterioration, even after 10000 large-angle bending cycles. This work advances the universal fabrication of high-performance, full-inorganic wearable gas sensors for breath-based diagnostic applications. |
doi_str_mv | 10.1021/acs.nanolett.4c05504 |
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This study develops a hyper-flexible, thermally stable, and highly breathable full-inorganic, self-supporting In2–x Ga x O3–Al2O3/Al2O3 nanofiber membrane sensor, fabricated using a dual-spinneret electrospinning method with an interlocking design. This innovative sensor has a bilayer structure with an amorphous Al2O3 nanofiber substrate layer supporting an active layer of high-aspect-ratio interwoven In2–x Ga x O3 and Al2O3 nanofibers, providing outstanding flexibility, elevated breathability, and strong thermal stability. Owing to low-concentration Ga3+ doping and its nanofiber-built self-supporting porous design, the In1.98Ga0.02O3–Al2O3/Al2O3 sensor demonstrates excellent sensitivity, selectivity, and cycling stability for detecting ultralow-concentration NO biomarker (≈15 ppb) under simulated breath conditions, without performance deterioration, even after 10000 large-angle bending cycles. This work advances the universal fabrication of high-performance, full-inorganic wearable gas sensors for breath-based diagnostic applications.</description><identifier>ISSN: 1530-6984</identifier><identifier>EISSN: 1530-6992</identifier><identifier>DOI: 10.1021/acs.nanolett.4c05504</identifier><language>eng</language><publisher>American Chemical Society</publisher><ispartof>Nano letters, 2025-01, Vol.25 (2), p.845-853</ispartof><rights>2025 American Chemical Society</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><orcidid>0000-0001-5910-2106 ; 0000-0002-1965-9070 ; 0000-0001-5054-1495</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://pubs.acs.org/doi/pdf/10.1021/acs.nanolett.4c05504$$EPDF$$P50$$Gacs$$H</linktopdf><linktohtml>$$Uhttps://pubs.acs.org/doi/10.1021/acs.nanolett.4c05504$$EHTML$$P50$$Gacs$$H</linktohtml><link.rule.ids>314,776,780,27053,27901,27902,56713,56763</link.rule.ids></links><search><creatorcontrib>Liu, Yumeng</creatorcontrib><creatorcontrib>Liu, Jia</creatorcontrib><creatorcontrib>Jia, Shuangju</creatorcontrib><creatorcontrib>Yu, Qian</creatorcontrib><creatorcontrib>Zhang, Min</creatorcontrib><creatorcontrib>Lu, Hongbing</creatorcontrib><creatorcontrib>Zhang, Jinniu</creatorcontrib><creatorcontrib>Gao, Jianzhi</creatorcontrib><creatorcontrib>Zhu, Benpeng</creatorcontrib><title>High-Aspect-Ratio In2–x Ga x O3 Integrated with Amorphous Al2O3 Nanofibers: All-Inorganic Self-Supporting Wearable Membranes for Ultralow-Concentration NO Sensing in Simulated Exhalation</title><title>Nano letters</title><addtitle>Nano Lett</addtitle><description>Achieving high flexibility, breathability, and sensitivity in inorganic semiconductor gas sensors remains a substantial challenge, especially for wearable applications in high-humidity environments. This study develops a hyper-flexible, thermally stable, and highly breathable full-inorganic, self-supporting In2–x Ga x O3–Al2O3/Al2O3 nanofiber membrane sensor, fabricated using a dual-spinneret electrospinning method with an interlocking design. This innovative sensor has a bilayer structure with an amorphous Al2O3 nanofiber substrate layer supporting an active layer of high-aspect-ratio interwoven In2–x Ga x O3 and Al2O3 nanofibers, providing outstanding flexibility, elevated breathability, and strong thermal stability. Owing to low-concentration Ga3+ doping and its nanofiber-built self-supporting porous design, the In1.98Ga0.02O3–Al2O3/Al2O3 sensor demonstrates excellent sensitivity, selectivity, and cycling stability for detecting ultralow-concentration NO biomarker (≈15 ppb) under simulated breath conditions, without performance deterioration, even after 10000 large-angle bending cycles. 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This study develops a hyper-flexible, thermally stable, and highly breathable full-inorganic, self-supporting In2–x Ga x O3–Al2O3/Al2O3 nanofiber membrane sensor, fabricated using a dual-spinneret electrospinning method with an interlocking design. This innovative sensor has a bilayer structure with an amorphous Al2O3 nanofiber substrate layer supporting an active layer of high-aspect-ratio interwoven In2–x Ga x O3 and Al2O3 nanofibers, providing outstanding flexibility, elevated breathability, and strong thermal stability. Owing to low-concentration Ga3+ doping and its nanofiber-built self-supporting porous design, the In1.98Ga0.02O3–Al2O3/Al2O3 sensor demonstrates excellent sensitivity, selectivity, and cycling stability for detecting ultralow-concentration NO biomarker (≈15 ppb) under simulated breath conditions, without performance deterioration, even after 10000 large-angle bending cycles. This work advances the universal fabrication of high-performance, full-inorganic wearable gas sensors for breath-based diagnostic applications.</abstract><pub>American Chemical Society</pub><doi>10.1021/acs.nanolett.4c05504</doi><tpages>9</tpages><orcidid>https://orcid.org/0000-0001-5910-2106</orcidid><orcidid>https://orcid.org/0000-0002-1965-9070</orcidid><orcidid>https://orcid.org/0000-0001-5054-1495</orcidid></addata></record> |
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title | High-Aspect-Ratio In2–x Ga x O3 Integrated with Amorphous Al2O3 Nanofibers: All-Inorganic Self-Supporting Wearable Membranes for Ultralow-Concentration NO Sensing in Simulated Exhalation |
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