Ultrasensitive Mg²⁺-Modulated Carbon Nanotube/Tannic Acid Aerogels for High-Performance Wearable Pressure Sensors

Three-dimensional (3D) carbon nanotube-based porous networks have received considerable attention as active nanomaterials for flexible/wearable sensor applications due to their excellent conductivity and mechanical flexibility. Herein, ultralight, biocompatible, and conductive SWCNT/tannic acid (TA) and Mg2+/SWCNT/TA aerogels have been facilely fabricated using TA as a dispersion reagent and crosslinker and Mg2+ to introduce a metal–phenolic network. The construction of a SWCNT@TA core–shell structure and the low CNT concentration of SWCNT/TA3:3 contribute to a high linear sensitivity of 432 kPa–1 in a wide pressure range (0.014–28 kPa), while Mg2+ modulation endows Mg2+/SWCNT/TA1:1 with an ultrahigh linear sensitivity of 13662 kPa–1 in a pressure range of 0.014–1.05 kPa. The superior sensing performance of as-prepared aerogels, including high sensitivity, wide working range, low detection limit (14 Pa), and fast stimuli-response (200–300 ms), enables them to detect tiny changes in human biosignals and imperceptible vibration, which show great potential in applications of health monitoring, human–machine interfaces, and various flexible electronics

Ultrasensitive Mg²⁺-Modulated Carbon Nanotube/Tannic Acid Aerogels for High-Performance Wearable Pressure Sensors

Three-dimensional (3D) carbon nanotube-based porous networks have received considerable attention as active nanomaterials for flexible/wearable sensor applications due to their excellent conductivity and mechanical flexibility. Herein, ultralight, biocompatible, and conductive SWCNT/tannic acid (TA) and Mg2+/SWCNT/TA aerogels have been facilely fabricated using TA as a dispersion reagent and crosslinker and Mg2+ to introduce a metal–phenolic network. The construction of a SWCNT@TA core–shell structure and the low CNT concentration of SWCNT/TA3:3 contribute to a high linear sensitivity of 432 kPa–1 in a wide pressure range (0.014–28 kPa), while Mg2+ modulation endows Mg2+/SWCNT/TA1:1 with an ultrahigh linear sensitivity of 13662 kPa–1 in a pressure range of 0.014–1.05 kPa. The superior sensing performance of as-prepared aerogels, including high sensitivity, wide working range, low detection limit (14 Pa), and fast stimuli-response (200–300 ms), enables them to detect tiny changes in human biosignals and imperceptible vibration, which show great potential in applications of health monitoring, human–machine interfaces, and various flexible electronics

Ultrasensitive Mg²⁺-Modulated Carbon Nanotube/Tannic Acid Aerogels for High-Performance Wearable Pressure Sensors

Three-dimensional (3D) carbon nanotube-based porous networks have received considerable attention as active nanomaterials for flexible/wearable sensor applications due to their excellent conductivity and mechanical flexibility. Herein, ultralight, biocompatible, and conductive SWCNT/tannic acid (TA) and Mg2+/SWCNT/TA aerogels have been facilely fabricated using TA as a dispersion reagent and crosslinker and Mg2+ to introduce a metal–phenolic network. The construction of a SWCNT@TA core–shell structure and the low CNT concentration of SWCNT/TA3:3 contribute to a high linear sensitivity of 432 kPa–1 in a wide pressure range (0.014–28 kPa), while Mg2+ modulation endows Mg2+/SWCNT/TA1:1 with an ultrahigh linear sensitivity of 13662 kPa–1 in a pressure range of 0.014–1.05 kPa. The superior sensing performance of as-prepared aerogels, including high sensitivity, wide working range, low detection limit (14 Pa), and fast stimuli-response (200–300 ms), enables them to detect tiny changes in human biosignals and imperceptible vibration, which show great potential in applications of health monitoring, human–machine interfaces, and various flexible electronics

Ultrasensitive Mg²⁺-Modulated Carbon Nanotube/Tannic Acid Aerogels for High-Performance Wearable Pressure Sensors

Three-dimensional (3D) carbon nanotube-based porous networks have received considerable attention as active nanomaterials for flexible/wearable sensor applications due to their excellent conductivity and mechanical flexibility. Herein, ultralight, biocompatible, and conductive SWCNT/tannic acid (TA) and Mg2+/SWCNT/TA aerogels have been facilely fabricated using TA as a dispersion reagent and crosslinker and Mg2+ to introduce a metal–phenolic network. The construction of a SWCNT@TA core–shell structure and the low CNT concentration of SWCNT/TA3:3 contribute to a high linear sensitivity of 432 kPa–1 in a wide pressure range (0.014–28 kPa), while Mg2+ modulation endows Mg2+/SWCNT/TA1:1 with an ultrahigh linear sensitivity of 13662 kPa–1 in a pressure range of 0.014–1.05 kPa. The superior sensing performance of as-prepared aerogels, including high sensitivity, wide working range, low detection limit (14 Pa), and fast stimuli-response (200–300 ms), enables them to detect tiny changes in human biosignals and imperceptible vibration, which show great potential in applications of health monitoring, human–machine interfaces, and various flexible electronics

Comparison of GO biological process terms significantly enriched among the up- and down-regulated genes of LA1777, LA3969, and LA4024 under cold stress.

<p>The image was generated using Genesis software <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0050785#pone.0050785-Sturn1" target="_blank">[35]</a>. Each colour rectangle in the figure represents one GO term. Red indicates GO biological process terms that are significantly enriched (p<0.01, FDR as the cut off) among the up-regulated genes, green indicates GO biological process terms that are significantly enriched among the down-regulated genes, and yellow indicates no significant. Significantly enriched GO biological process terms identified in both tolerant genotypes or exclusively in the sensitive one are listed. For more details see <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0050785#pone.0050785.s008" target="_blank">Table S4</a>.</p

Chromosomal distribution of genes differentially expressed between the tolerant and sensitive genotypes under cold stress.

<p>Each horizontal line represents one gene. The red lines represent the 92 genes (as shown in <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0050785#pone.0050785.s001" target="_blank">Figures S1</a>) with significant difference in expression between the two tolerant and sensitive genotypes under cold stress. The blue lines represent the 126 genes (as shown in <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0050785#pone.0050785.s006" target="_blank">Table S2</a>) whose expression level in LA1777 is significantly different from that in LA3969 and LA4024. The yellow regions on chromosomes indicated the introgressed chromosomal regions of the 22 selected cold-tolerant ILs and/or cold tolerance QTLs identified previously in <i>S. habrochaites </i><a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0050785#pone.0050785-Goodstal1" target="_blank">[7]</a>, <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0050785#pone.0050785-Vallejos1" target="_blank">[12]</a>, <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0050785#pone.0050785-Truco1" target="_blank">[13]</a>. Chromosome numbers are indicated at the top of each bar. Question mark indicates probe sequence dose not match on chromosome.</p

Significantly altered biochemical pathways and their corresponding gene expression between tolerant and sensitive tomato genotypes under cold stress.

<p>The 92 genes with significant differences in expression between tolerant and sensitive genotypes at 3 d of cold treatment (4°C) were analyzed for significantly (p<0.05) altered biochemical pathways using the Plant MetGenMAP system <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0050785#pone.0050785-Joung1" target="_blank">[33]</a>. (A) Positive (up-regulated) and negative (down-regulated) expression values (log₂ ratio cold stress/control) are means of three independent biological replicates.</p

Venn diagrams showing number and overlap of differentially expressed genes under cold stress in LA1777, LA3969, and LA4024.

<p>(A) Number of up-regulated genes (log₂ ratio stress/control≥2 and q-value<0.05). (B) Number of down-regulated genes (log₂ ratio stress/control≤−2 and q-value<0.05). The number in parentheses indicates the total number of genes up- or down-regulated by cold stress in each genotype.</p