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Power generation from ambient humidity using protein nanowires 期刊论文
NATURE, 2020, 578 (7796) : 550-+
作者:  Luong, Duy X.;  Bets, Ksenia V.;  Algozeeb, Wala Ali;  Stanford, Michael G.;  Kittrell, Carter;  Chen, Weiyin;  Salvatierra, Rodrigo V.;  Ren, Muqing;  McHugh, Emily A.;  Advincula, Paul A.;  Wang, Zhe;  Bhatt, Mahesh;  Guo, Hua;  Mancevski, Vladimir;  Shahsavari, Rouzbeh;  Yakobson, Boris I.;  Tour, James M.
收藏  |  浏览/下载:85/0  |  提交时间:2020/07/03

Harvesting energy from the environment offers the promise of clean power for self-sustained systems(1,2). Known technologies-such as solar cells, thermoelectric devices and mechanical generators-have specific environmental requirements that restrict where they can be deployed and limit their potential for continuous energy production(3-5). The ubiquity of atmospheric moisture offers an alternative. However, existing moisture-based energy-harvesting technologies can produce only intermittent, brief (shorter than 50 seconds) bursts of power in the ambient environment, owing to the lack of a sustained conversion mechanism(6-12). Here we show that thin-film devices made from nanometre-scale protein wires harvested from the microbe Geobacter sulfurreducens can generate continuous electric power in the ambient environment. The devices produce a sustained voltage of around 0.5 volts across a 7-micrometre-thick film, with a current density of around 17 microamperes per square centimetre. We find the driving force behind this energy generation to be a self-maintained moisture gradient that forms within the film when the film is exposed to the humidity that is naturally present in air. Connecting several devices linearly scales up the voltage and current to power electronics. Our results demonstrate the feasibility of a continuous energy-harvesting strategy that is less restricted by location or environmental conditions than other sustainable approaches.


A new type of energy-harvesting device, based on protein nanowires from the microbe Geobacter sulforreducens, can generate a sustained power output by producing a moisture gradient across the nanowire film using natural humidity.


  
Agriculture erases climate constraints on soil nematode communities across large spatial scales 期刊论文
GLOBAL CHANGE BIOLOGY, 2019
作者:  Li, Xianping;  Zhu, Huimin;  Geisen, Stefan;  Bellard, Celine;  Hu, Feng;  Li, Huixin;  Chen, Xiaoyun;  Liu, Manqiang
收藏  |  浏览/下载:8/0  |  提交时间:2019/11/27
beta diversity  biotic homogenization  environmental gradient  functional traits  land conversion  phylogenetic diversity  soil biodiversity  soil nematodes  
Superorganisms or loose collections of species? A unifying theory of community patterns along environmental gradients 期刊论文
ECOLOGY LETTERS, 2019, 22 (8) : 1243-1252
作者:  Liautaud, Kevin;  van Nes, Egbert H.;  Barbier, Matthieu;  Scheffer, Marten;  Loreau, Michel
收藏  |  浏览/下载:9/0  |  提交时间:2019/11/27
Alternative stable states  community organisation  competition theory  critical transitions  environmental gradient  Lotka-Volterra model  
Global patterns of intraspecific leaf trait responses to elevation 期刊论文
GLOBAL CHANGE BIOLOGY, 2019, 25 (7) : 2485-2498
作者:  Midolo, Gabriele;  De Frenne, Pieter;  Hoelzel, Norbert;  Wellstein, Camilla
收藏  |  浏览/下载:6/0  |  提交时间:2019/11/27
altitude  carbon isotope ratio  environmental gradient  intraspecific variability  leaf nutrient content  meta-analysis  phenotypic variability  plant functional traits  
Local adaptation, dispersal evolution, and the spatial eco-evolutionary dynamics of invasion 期刊论文
ECOLOGY LETTERS, 2019, 22 (5) : 767-777
作者:  Andrade-Restrepo, Martin;  Champagnat, Nicolas;  Ferriere, Regis
收藏  |  浏览/下载:5/0  |  提交时间:2019/11/26
Adaptive evolution  environmental gradient  population clustering  range expansion  spatially structured population  
Geographical patterns and drivers of growth dynamics of Quercus variabilis 期刊论文
FOREST ECOLOGY AND MANAGEMENT, 2018, 429: 256-266
作者:  Gao, Wen-Qiang;  Liu, Jian-Feng;  Xue, Ze-Min;  Zhang, Yu-Ting;  Gao, Zhong-Hai;  Ni, Yan-Yan;  Wang, Xiao-Fei;  Jiang, Ze-Ping
收藏  |  浏览/下载:4/0  |  提交时间:2019/04/09
Quercus variabilis  Tree ring  Growth  Geographical gradient  Environmental factor  
The more-individuals hypothesis revisited: the role of community abundance in species richness regulation and the productivity-diversity relationship 期刊论文
ECOLOGY LETTERS, 2018, 21 (6) : 920-937
作者:  Storch, David;  Bohdalkova, Eliska;  Okie, Jordan
收藏  |  浏览/下载:4/0  |  提交时间:2019/04/09
Abundance  biodiversity patterns  climate  diversity equilibria  environmental productivity  extinction  latitudinal diversity gradient  speciation  species-energy relationship  
Agriculture erases climate-driven beta-diversity in Neotropical bird communities 期刊论文
GLOBAL CHANGE BIOLOGY, 2018, 24 (1) : 338-349
作者:  Karp, Daniel S.;  Frishkoff, Luke O.;  Echeverri, Alejandra;  Zook, Jim;  Juarez, Pedro;  Chan, Kai M. A.
收藏  |  浏览/下载:10/0  |  提交时间:2019/04/09
agro-ecology  bird  climate change  environmental gradient  homogenization  multiple stressors  tropical  turnover  
Growth response of Scots pines in polar-alpine tree-line to a warming climate 期刊论文
FOREST ECOLOGY AND MANAGEMENT, 2017, 399
作者:  Franke, A. K.;  Braeuning, A.;  Timonen, M.;  Rautio, P.
收藏  |  浏览/下载:3/0  |  提交时间:2019/04/09
Pinus sylvestris  Tree line  Environmental change  Growth response  Latitudinal and altitudinal gradient  Tree age  Dendroecology  
Robust predictive performance of indicator species despite different co-occurrence patterns of birds in natural and managed boreal forests 期刊论文
FOREST ECOLOGY AND MANAGEMENT, 2017, 397
作者:  Zhao, Qing;  Mason, Tom H. E.;  Azeria, Ermias T.;  Le Blanc, Melanie-Louise;  Lemaitre, Jerome;  Barnier, Florian;  Bichet, Orphe;  Fortin, Daniel
收藏  |  浏览/下载:4/0  |  提交时间:2019/04/09
Bird diversity  Biodiversity surrogates  Boreal ecosystem  Coexistence  Disturbance gradient  Environmental filtering