As efforts to harvest clean water in arid regions continue, a team of scientists has developed crystals that create water from air without using energy.
The team, from New York University Abu Dhabi's Smart Materials Lab, Jilin University in China and the Centre for Smart Engineering Materials, developed elastic organic crystals – named Janus. Inspired by desert plants and animals, these crystals are capable of capturing moisture from the air.
The findings, published in October in the Journal of the American Chemical Society, also showed how this technology could accelerate water collection on an industrial scale, potentially offering an alternative to energy-intensive desalination, which provides most of the UAE’s water.
According to US Geological Survey data, Earth's atmosphere holds about 13,000 cubic kilometres of water.
“This is an untapped source of water that is just present, but there are no efficient ways to utilise this water,” said professor of chemistry at NYU Abu Dhabi, Pance Naumov, who led the research. “We would like to capitalise on the fact that we have humidity present in the air, but what we need is a more efficient way to harvest that water and convert it into potable water.
“That water does not contain any salts, so we don’t need to use any energy to desalinate it. What we need is efficient technology to harvest it and convert it into liquid water.”
Prof Naumov added that the opportunities in Abu Dhabi are significant given the coastal location and the way that humidity fluctuates significantly during the course of the day, adding that their research is “very effective”.
“It is a record holder in the amount of water that it can collect over a certain period of time and over the surface area of the material.”
What's the science behind it?
Part of the surface of the crystals that Prof Naumov and his team have worked on is hydrophobic or water repellent, while the other part is hydrophilic, meaning they no longer repel water. Water is collected in a hydrophilic area and transported by a hydrophobic region to a receptacle.
This twin feature of the crystals is why it was named after a Roman god Janus who was often depicted with two faces.
Another key feature of the Janus crystals is their optical transparency, so if a laser or light is shone one side, it passes through to the other side. This property is useful to monitor water collection, Prof Naumov said.
“If the crystal does not have any water droplets on its surface, we have normal transduction of light, but when we have drops accumulating, because of different interactions between the crystal and the water, this affects the light passing through the crystal,” he explained. This makes the process “smart or advanced compared to other materials that do not have self-sensing capability”.
Alternatives to Janus crystals?
Any organic crystal that can grow in elongated shapes allowing some parts to be covered with a hydrophobic coating could potentially be used to collect water, Prof Naumov said. “In principle we can use environmentally-friendly or benign or even biodegradable crystals for the same purpose so they will be used to collect water and after that discarded and not have any footprint on the environment,” he added.
“The next stage would be for this technology to be developed further – to optimise the composition, for example, to compare different materials, to assess different crystals against existing water-collection materials and finally to scale this up on an industrial level.”
Desert beetles show ingenuity of nature
Beetles in Africa's Namib Desert collect water from fog on their shells, a phenomenon that has intrigued researchers for years. The insects feature hydrophilic bumps that accumulate moisture from the air and hydrophobic channels that direct water to their mouths.
In a paper published early this year in PNAS Nexus, researchers in the US highlighted the importance for water collection of tiny surface irregularities on the backs of desert beetles with the scientific name Onymacris bicolour.
The scientists compared the water-collection capabilities of dead beetles that had their shells coated with gold paint (which affects wettability), nail polish (which covers surface irregularities) and both paint and polish. These were then placed in tiny channels through which fog passed.
It showed that the ones with gold coating had little impact on the amount of water collected, while those that were not covered by nail polish showed greater water harvesting.
Dr Hunter King, an assistant professor at Rutgers University in the US, said that the “impaction efficiency”, which is a key factor affecting water accumulation, “is significantly increased by the texture of the surface”.
“We have also clearly seen that dramatically changing the surface chemistry or wettability of the surface has no effect on impaction,” he told The National.
“I'm hopeful that our takeaway – that the shape and texture of an aerosol-intercepting target … can significantly affect collection – could be used to enhance relevant technologies,” he said, adding that it will be helpful for developing devices that collect water.
Watch: Innovation at heart of water security fight
START-UPS%20IN%20BATCH%204%20OF%20SANABIL%20500'S%20ACCELERATOR%20PROGRAMME
%3Cp%3E%3Cstrong%3ESaudi%20Arabia%3C%2Fstrong%3E%3C%2Fp%3E%0A%3Cp%3E%3Cstrong%3EJoy%3A%3C%2Fstrong%3E%20Delivers%20car%20services%20with%20affordable%20prices%3C%2Fp%3E%0A%3Cp%3E%3Cstrong%3EKaraz%3A%3C%2Fstrong%3E%20Helps%20diabetics%20with%20gamification%2C%20IoT%20and%20real-time%20data%3C%2Fp%3E%0A%3Cp%3E%3Cstrong%3EMedicarri%3A%3C%2Fstrong%3E%20Medical%20marketplace%20that%20connects%20clinics%20with%20suppliers%3C%2Fp%3E%0A%3Cp%3E%3Cstrong%3EMod5r%3C%2Fstrong%3E%3A%20Makes%20automated%20and%20recurring%20investments%20to%20grow%20wealth%3C%2Fp%3E%0A%3Cp%3E%3Cstrong%3EStuck%3A%3C%2Fstrong%3E%20Live%2C%20on-demand%20language%20support%20to%20boost%20writing%3C%2Fp%3E%0A%3Cp%3E%3Cstrong%3EWalzay%3A%3C%2Fstrong%3E%20Helps%20in%20recruitment%20while%20reducing%20hiring%20time%3C%2Fp%3E%0A%3Cp%3E%3Cstrong%3EUAE%3C%2Fstrong%3E%3C%2Fp%3E%0A%3Cp%3E%3Cstrong%3EEighty6%3A%20%3C%2Fstrong%3EMarketplace%20for%20restaurant%20and%20supplier%20procurements%3C%2Fp%3E%0A%3Cp%3E%3Cstrong%3EFarmUnboxed%3A%20%3C%2Fstrong%3EHelps%20digitise%20international%20food%20supply%20chain%3C%2Fp%3E%0A%3Cp%3E%3Cstrong%3ENutriCal%3A%3C%2Fstrong%3E%20Helps%20F%26amp%3BB%20businesses%20and%20governments%20with%20nutritional%20analysis%3C%2Fp%3E%0A%3Cp%3E%3Cstrong%3EWellxai%3A%3C%2Fstrong%3E%20Provides%20insurance%20that%20enables%20and%20rewards%20user%20habits%3C%2Fp%3E%0A%3Cp%3E%3Cstrong%3EEgypt%3C%2Fstrong%3E%3C%2Fp%3E%0A%3Cp%3E%3Cstrong%3EAmwal%3A%3C%2Fstrong%3E%20A%20Shariah-compliant%20crowd-lending%20platform%3C%2Fp%3E%0A%3Cp%3E%3Cstrong%3EDeben%3A%3C%2Fstrong%3E%20Helps%20CFOs%20manage%20cash%20efficiently%3C%2Fp%3E%0A%3Cp%3E%3Cstrong%3EEgab%3A%3C%2Fstrong%3E%20Connects%20media%20outlets%20to%20journalists%20in%20hard-to-reach%20areas%20for%20exclusives%3C%2Fp%3E%0A%3Cp%3E%3Cstrong%3ENeqabty%3A%3C%2Fstrong%3E%20Digitises%20financial%20and%20medical%20services%20of%20labour%20unions%3C%2Fp%3E%0A%3Cp%3E%3Cstrong%3EOman%3C%2Fstrong%3E%3C%2Fp%3E%0A%3Cp%3E%3Cstrong%3EMonak%3A%3C%2Fstrong%3E%20Provides%20financial%20inclusion%20and%20life%20services%20to%20migrants%3C%2Fp%3E%0A
Conflict, drought, famine
Estimates of the number of deaths caused by the famine range from 400,000 to 1 million, according to a document prepared for the UK House of Lords in 2024.
It has been claimed that the policies of the Ethiopian government, which took control after deposing Emperor Haile Selassie in a military-led revolution in 1974, contributed to the scale of the famine.
Dr Miriam Bradley, senior lecturer in humanitarian studies at the University of Manchester, has argued that, by the early 1980s, “several government policies combined to cause, rather than prevent, a famine which lasted from 1983 to 1985. Mengistu’s government imposed Stalinist-model agricultural policies involving forced collectivisation and villagisation [relocation of communities into planned villages].
The West became aware of the catastrophe through a series of BBC News reports by journalist Michael Buerk in October 1984 describing a “biblical famine” and containing graphic images of thousands of people, including children, facing starvation.
Band Aid
Bob Geldof, singer with the Irish rock group The Boomtown Rats, formed Band Aid in response to the horrific images shown in the news broadcasts.
With Midge Ure of the band Ultravox, he wrote the hit charity single Do They Know it’s Christmas in December 1984, featuring a string of high-profile musicians.
Following the single’s success, the idea to stage a rock concert evolved.
Live Aid was a series of simultaneous concerts that took place at Wembley Stadium in London, John F Kennedy Stadium in Philadelphia, the US, and at various other venues across the world.
The combined event was broadcast to an estimated worldwide audience of 1.5 billion.
Lexus LX700h specs
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The specs
- Engine: 3.9-litre twin-turbo V8
- Power: 640hp
- Torque: 760nm
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The%20specs
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Tightening the screw on rogue recruiters
The UAE overhauled the procedure to recruit housemaids and domestic workers with a law in 2017 to protect low-income labour from being exploited.
Only recruitment companies authorised by the government are permitted as part of Tadbeer, a network of labour ministry-regulated centres.
A contract must be drawn up for domestic workers, the wages and job offer clearly stating the nature of work.
The contract stating the wages, work entailed and accommodation must be sent to the employee in their home country before they depart for the UAE.
The contract will be signed by the employer and employee when the domestic worker arrives in the UAE.
Only recruitment agencies registered with the ministry can undertake recruitment and employment applications for domestic workers.
Penalties for illegal recruitment in the UAE include fines of up to Dh100,000 and imprisonment
But agents not authorised by the government sidestep the law by illegally getting women into the country on visit visas.
More from Neighbourhood Watch:
2.0
Director: S Shankar
Producer: Lyca Productions; presented by Dharma Films
Cast: Rajnikanth, Akshay Kumar, Amy Jackson, Sudhanshu Pandey
Rating: 3.5/5 stars
What drives subscription retailing?
Once the domain of newspaper home deliveries, subscription model retailing has combined with e-commerce to permeate myriad products and services.
The concept has grown tremendously around the world and is forecast to thrive further, according to UnivDatos Market Insights’ report on recent and predicted trends in the sector.
The global subscription e-commerce market was valued at $13.2 billion (Dh48.5bn) in 2018. It is forecast to touch $478.2bn in 2025, and include the entertainment, fitness, food, cosmetics, baby care and fashion sectors.
The report says subscription-based services currently constitute “a small trend within e-commerce”. The US hosts almost 70 per cent of recurring plan firms, including leaders Dollar Shave Club, Hello Fresh and Netflix. Walmart and Sephora are among longer established retailers entering the space.
UnivDatos cites younger and affluent urbanites as prime subscription targets, with women currently the largest share of end-users.
That’s expected to remain unchanged until 2025, when women will represent a $246.6bn market share, owing to increasing numbers of start-ups targeting women.
Personal care and beauty occupy the largest chunk of the worldwide subscription e-commerce market, with changing lifestyles, work schedules, customisation and convenience among the chief future drivers.
ELIO
Starring: Yonas Kibreab, Zoe Saldana, Brad Garrett
Directors: Madeline Sharafian, Domee Shi, Adrian Molina
Rating: 4/5
Chef Nobu's advice for eating sushi
“One mistake people always make is adding extra wasabi. There is no need for this, because it should already be there between the rice and the fish.
“When eating nigiri, you must dip the fish – not the rice – in soy sauce, otherwise the rice will collapse. Also, don’t use too much soy sauce or it will make you thirsty. For sushi rolls, dip a little of the rice-covered roll lightly in soy sauce and eat in one bite.
“Chopsticks are acceptable, but really, I recommend using your fingers for sushi. Do use chopsticks for sashimi, though.
“The ginger should be eaten separately as a palette cleanser and used to clear the mouth when switching between different pieces of fish.”
Key figures in the life of the fort
Sheikh Dhiyab bin Isa (ruled 1761-1793) Built Qasr Al Hosn as a watchtower to guard over the only freshwater well on Abu Dhabi island.
Sheikh Shakhbut bin Dhiyab (ruled 1793-1816) Expanded the tower into a small fort and transferred his ruling place of residence from Liwa Oasis to the fort on the island.
Sheikh Tahnoon bin Shakhbut (ruled 1818-1833) Expanded Qasr Al Hosn further as Abu Dhabi grew from a small village of palm huts to a town of more than 5,000 inhabitants.
Sheikh Khalifa bin Shakhbut (ruled 1833-1845) Repaired and fortified the fort.
Sheikh Saeed bin Tahnoon (ruled 1845-1855) Turned Qasr Al Hosn into a strong two-storied structure.
Sheikh Zayed bin Khalifa (ruled 1855-1909) Expanded Qasr Al Hosn further to reflect the emirate's increasing prominence.
Sheikh Shakhbut bin Sultan (ruled 1928-1966) Renovated and enlarged Qasr Al Hosn, adding a decorative arch and two new villas.
Sheikh Zayed bin Sultan (ruled 1966-2004) Moved the royal residence to Al Manhal palace and kept his diwan at Qasr Al Hosn.
Sources: Jayanti Maitra, www.adach.ae
Racecard
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7.45pm: Firebreak Stakes Group 3 (TB) $150,000 (D) 1,600m
8.20pm: Al Maktoum Challenge Round 2 Group 2 (TB) $350,000 (D) 1,900m
8.55pm: Al Bastakiya Trial Conditions (TB) $60,000 (D) 1,900m
9.30pm: Balanchine Group 2 (TB) $180,000 (T) 1,800m
Company info
Company name: Entrupy
Co-founders: Vidyuth Srinivasan, co-founder/chief executive, Ashlesh Sharma, co-founder/chief technology officer, Lakshmi Subramanian, co-founder/chief scientist
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Initial investment/Investors: Entrupy secured a $2.6m Series A funding round in 2017. The round was led by Tokyo-based Digital Garage and Daiwa Securities Group's jointly established venture arm, DG Lab Fund I Investment Limited Partnership, along with Zach Coelius.
Total customers: Entrupy’s customers include hundreds of secondary resellers, marketplaces and other retail organisations around the world. They are also testing with shipping companies as well as customs agencies to stop fake items from reaching the market in the first place.
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- An elevated football field that doubles as a helipad
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