Morphophylogenetic assessment of a new moss species Bryum bharatiense sp. nov. (Bryaceae) from Larsemann Hills, Eastern Antarctica

Rehman, Wahid Ul; Gupta, Kshitiz; Bast, Felix

doi:10.1016/j.japb.2021.07.001

Cited by 3 publications

(1 citation statement)

References 23 publications

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“…The exploration of polar regions can help humans understand climate change and evolution, discover ancient civilizations, and study the survival of organisms in extreme environments. − Despite the challenges, humans have never stopped exploring in Earth’s cold extremes. Various resources, including old ice, fossils, methane, organic carbon, and novel species, have been discovered in polar regions, − and ∼500 million US dollars are invested in polar programs by the US National Science Foundation annually . A major challenge to polar exploration is the extremely low temperatures.…”

Section: Introductionmentioning

confidence: 99%

Highly Stretchable, Self-Healing, and Sensitive E-Skins at −78 °C for Polar Exploration

Yang,

Li,

Tian

et al. 2024

J. Am. Chem. Soc.

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Ultralow temperature-tolerant electronic skins (e-skins) can endow polar robots with tactile feedback for exploring in extremely cold polar environments. However, it remains a challenge to develop e-skins that enable sensitive touch sensation and self-healing at ultralow temperatures. Herein, we describe the development of a sensitive robotic hand e-skin that can stretch, selfheal, and sense at temperatures as low as −78 °C. The elastomeric substrate of this e-skin is based on poly(dimethylsiloxane) supramolecular polymers and multistrength dynamic H-bonds, in particular with quadruple H-bonding motifs (UPy). The structure−performance relationship of the elastomer at ultralow temperatures is investigated. The results show that elastomers with side-chain UPy units exhibit higher stretchability (∼3257%) and self-healing efficiency compared to those with main-chain UPy units. This is attributed to the lower binding energy variation and lower potential well. Based on the elastomer with side-chain UPy and man-made electric ink, a sensitive robotic hand e-skin for usage at −78 °C is constructed to precisely sense the shape of objects and specific symbols, and its sensation can completely self-recover after being damaged. The findings of this study contribute to the concept of using robotic hands with e-skins in polar environments that make human involvement limited, dangerous, or impossible.

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