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From: Jan Panteltje <alien@comet.invalid>
Newsgroups: sci.electronics.design
Subject: Re: OT: light altering paint for greenhouses could help lengthen
 fruit growing season in the UK
Date: Sun, 24 Nov 2024 13:18:10 GMT
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On a sunny day (Sun, 24 Nov 2024 20:21:17 +1100) it happened Bill Sloman
<bill.sloman@ieee.org> wrote in <vhur6f$2618b$1@dont-email.me>:

>On 24/11/2024 5:43 pm, Jan Panteltje wrote:
>> Light-altering paint for greenhouses could help lengthen the fruit growing season in the UK
>>   https://www.sciencedaily.com/releases/2024/11/241120122018.htm
>> Summary:
>>   New spray developed by scientists could help boost UK farming and increase the UK's food security.
>> 
>> Paper:
>>   https://onlinelibrary.wiley.com/doi/10.1002/admt.202400977
>> 
>> stuff they use, quote:
>> '
>>   In this paper, we develop an approach based on readily prepared and cheap
>>   Eu3+-containing polyoxotitanium cages (Eu-POTs) which, we show,
>>   possess the necessary design features listed before.
>>   Having established the ground rules for selective modification,
>>   we introduce a working prototype luminophore with high PLQY (>60%)
>>   which is soluble in a range of commercial plastics, including water-based
>>   acrylic paint that can be sprayed onto conventional glass greenhouses
>>   in an agricultural environment.
>
>What you needed to say - and didn't - was that the luminophore absorbs 
>wavelengths shorter than red, and re-emits the energy at a wavvelength 
>in the red which is efficiently absorbed by plant chlorophyll.
>
>The article talks about UV light - though there's not a lot of that in 
>sunlight, and even less in English sunlight - so it's not exactly helpful.

Not only about UV.
As to UV, I just tried an UV flashlight (as for testing bank notes) on the green emitting tape I have,
it works, lights up green for some time!
 https://www.ebay.com/itm/385636467738
:-)