Printed Solar Bio-Batteries

Printed Solar Bio-Batteries
Printed Solar Bio-Batteries
Printed Solar Bio-Batteries

Printed Solar Bio-Batteries

Led by biotechnologist Marin Sawa, a group of researchers at Imperial College London have devised a way to print solar cells onto paper. They use an inkjet printer to place a conductive layer of carbon nanotubes and a layer of living cyanobacteria to create devices which can capture and store solar energy.

In their proof-of-concept experiment, the cyanobacteria survived the printing process and were able to produce energy from photosynthesis. The trial panel was palm sized and gave enough energy to power a small LED light. Even better, being little more than paper, carbon, and bacteria, the bio-cells are fully biodegradable.

The work is part of an emerging field of science called microbial biophotovoltaics (presumably related to the biovoltaics I’ve mentioned here before) which uses algae and cyanobacteria to generate energy. The energy generated may be small, but it’s also cheap and easy to manufacture, and the microbes can continue generating electricity after dark, using compounds made during daylight.

The bio-batteries aren’t intended to replace standard photovoltaics for large scale energy production. Instead, they can provide an inexpensive and renewable source of energy for specific uses, such as air quality monitors and healthcare applications.

“Imagine a paper-based, disposable environmental sensor disguised as wallpaper, which could monitor air quality in the home. When it has done its job it could be removed and left to biodegrade in the garden without any impact on the environment.” – Marin Sawa

Sawa et al (2017) – open access

More Posts from Copperfingertips and Others

6 years ago
My IRL Friend Laura Meilman Is An Awesome Artist, And She Has Made Five Drawings Of Mermaids For The
My IRL Friend Laura Meilman Is An Awesome Artist, And She Has Made Five Drawings Of Mermaids For The
My IRL Friend Laura Meilman Is An Awesome Artist, And She Has Made Five Drawings Of Mermaids For The
My IRL Friend Laura Meilman Is An Awesome Artist, And She Has Made Five Drawings Of Mermaids For The
My IRL Friend Laura Meilman Is An Awesome Artist, And She Has Made Five Drawings Of Mermaids For The

My IRL friend Laura Meilman is an awesome artist, and she has made five drawings of mermaids for the environment.

They’re all for sale as prints over at her Etsy shop, and portions of the proceeds will go to the United Way of Genessee County’s Flint Water Fund, The Standing Rock Sioux Tribe, and The Nature Conservancy.

6 years ago
Floating A-frame, Submitted By Martino

Floating A-frame, submitted by Martino

6 years ago

How I Got into Backyard Farming

Idea:

Backyard Farming sounds crazy, so let’s try it  

What is it?

There is a movement where regular people are turning their backyards into micro farms and doing things like:

Growing all the salad ingredients they need for a year (minus the Russian dressing)

Growing 100 pounds of potatoes on a tiny patio

Raising a couple of chickens for meat and/or eggs

Raising Talapia fish to eat

Raising rabbits or quail for meat

Converting lawns into mini farms producing staple crops like corn and wheat

Using things like fences, walls, posts and garages to trellis things like grapes, squash, beans, and melons

Growing 100 pounds of garlic and selling it for $10 a pound at farmers markets

Raising bees and selling honey for $7 a pound at farmers markets

Making your own Beer, Wine, Meade, Cider or Brandy

Why this could be Awesome:

The goal here is that you do these things on your property without anyone really noticing or caring.  The goal is not to start up some “you might be a redneck if” style crazy farm on the lawn and instantly tank the neighborhood housing prices in the process.  With this project the goal is to be clandestine, or at least unnoticeable.  Do it right and neighbors will compliment how well your property looks as you bring them goodies from the garden all year long.  Other reasons this scheme could be awesome:

Lower your grocery bills

Be totally organic and chemical free

Potentially earn income

Less lawn mowing / Less using anything that runs on gas

Could be Fun

My Situation:

I live in a typical Cape Cod house on a quiet street in a medium sized city in Ohio.  I have neighbors very close on both sides and in the back.  In total I have about 0.3 acres of “land” which consists of a small front yard and a descent sized backyard enclosed in a chain link fence.  I have a tiny 1-car garage, a small patio, and normal guy yard tools.

Research Phase:

I went to the library and to the internet and looked up the following topics:

Small space / patio / container gardening

Permaculture / food forests / Organic Gardening

Homesteading /  Survivalist / Prepper (I’m not a prepper)

Aquaponics

Take a look at some YouTube videos on people who have backyard food forests.  Also Jeff Lawton’s videos on this topic are amazing.  I also recommend the book Gaia’s Garden and the website Permies.com

Let’s Do This:

And so when Spring rolled around I began…  The plan was to start small and incorporate little things at a time into my landscape, wait until I was used to them and make sure no one freaked out, and then slowly expand. 

Things I have Accomplished:

I’m on year three now and I think things are going relatively well.  Here’s a summary of things I have been able to do.   Note: Each topic below will have its own full post soon.

Toxin Free:  Gave up insecticide, commercial fertilizer and other toxins totally.

Compost: Created a composting system that produces about 1 pickup truck load of compost per year.

Waste Reduction: Generate zero yard waste.  Generate 1-2 bags of garbage per week, which is a reduction from 5 bags.  This reduction is due to composting, canning, burning paper with wood fires and using ashes in garden, reduction of processed foods purchased, etc.

Rainwater harvesting:  Made and Installed 2 Rain Barrels (55 gallons each), with a system to auto water the front yard with the flip of a switch using garden hose and gravity

Lawn Reduction:  More than half of my front yard is garden (but doesn’t look out of the ordinary at all).  Converted 1/3rd of my backyard to garden

Hugelkultur:  Installed about 56 feet of Hugelkultur mounds

Heavy Mulching: Threw down 2 dump truck loads of mulch, 3 pickup load of hay (about 40 bales) and 1 pickup load manure. 

Sheet Mulching: Experimented with Sheet mulching using cardboard and other materials to convert lawn to garden without digging.

Less Weeds: Cut weeding time down by using mulching techniques as well as chop & drop methods.  (you still get weeds, but less, and easier to pull)

No Dig / No till: Gave up Tilling totally.  There are many good reasons to do this. 

Less Mowing:  Mow only about 4-6 times a year (due to letting certain “weeds” grow into the lawn such as clover which doesn’t grow very tall).  Also, I mow the front lawn every other time with a gas free reel push mower, which saves gas and is very quiet (and a good workout).

Less Watering:  Cut watering in half (because of the rain barrels, a well-placed swale to slow down run-off and Hugelkultur mounds which soak up water like crazy)

Perennial Food:  Planted long-term plants such as 2 apple trees, 1 cherry tree, 2 blueberry bushes, 2 raspberry and 2 blackberry bushes, 10 square feet of strawberries, 2 grapevines, 8 asparagus plants.

Quasi Perennial Food:  Tomato patch comes back 80% every year from self seeding.  Also get a lot of self seeded greens and squash, by not picking everything.

Seed Starting:  Beginning to perfect a seed starting regimen that is actually starting to pay off.  Seed starting takes practice!

Big Crops:  Set to plant about 50 garlic plants this year.  Set to plant about 30 potato plants this year (these two plants both can be mixed into the front yard landscape).  Planted about 60 mustard green plants (also a beautiful plant)

Medicine:  Growing comfrey to be used for medicinal purposes as well as green manure / mulch.

Cool mini-Projects:  Things I have made from my backyard include Grape Juice, Vinegar, Tomato juice, Dijon Mustard, Tomato sauce, Roasted Dandelion Root coffee, Echinacea tincture, garlic braids, burn medicine, flower arrangements, and lots of delicious meals.

Things I want to Try:

There are so many things in backyard farming/ urban permaculture I still want to try. Here is my to-do list:

Plant way more fruit trees.  The ultimate goal of the permaculture “food forest” is basically to have tons of food growing everywhere on your property that requires little to no maintenance.  The hardest part should be picking all of the bounty.  Of course a key to this end state is to have lots of mature fruit trees that produce large quantities of high calorie foods year after year.  And even in cold Ohio, we can grow so many different kinds of fruit like cherry, apple, peach, plum, apricot and lots of berry and nut trees

Plant a successful cash crop.  I want to sell something at the farmers market!  I think garlic will be my first attempt because it is 100% maintenance free and 99% guaranteed to come up beautiful.  It also sells for a lot of money.  So far I have been eating mine, but each year I plant more and more.  One other nice thing is that you can space them really close together and plant them almost anywhere on the property, including right out in the front yard.  I tried to sell my mustard greens but nobody wanted them :(

Get bees.  Although probably not for everyone, I want bees.  There is some cost and some work involved, but you get honey, wax and increased pollination, and that is more than enough for me to want to try it.

Meat?  I’m not allowed to have chickens or any animal like that in my city.  Rabbits could work since they are silent and you could raise them somewhere covert and no one would know you had them.  But I don’t think I could kill and clean rabbits I raised.  I looked into pheasant and quail but same thing there.

Eggs? I’m not yet to the point where I’m going to defy my local laws and get a couple of chickens for egg productions, but If you are, there is a whole community on the net of covert chicken raisers.  The more hip urban cities such as St. Louis have legalized it, so do some research and go for it.  Don’t get any roosters unless you want to anger everyone within a 5 mile radius.

More Mulch!  Once you get into this hobby you quickly find that your soil sucks.  If you have a typical American house your soil is terrible because for the last 50 years your property has consisted of 90% grass which some guy mowed short twice a week and probably dumped mass quantities of weed and feed and other chemicals onto it.  All of the clippings were bagged and sent to the landfill and heavy rains continuously washed away any soil that happened to build up.  The fix is to throw down tons and tons of organic material like leaves, cut up weeds, hay, mulch, coffee grounds, manure, compost, etc.  But if you are a regular person with an office job you probably don’t have access to as much of this organic mulch as you need.  I’m always on the lookout on Craigslist for free manure and mulch, but it can be hard to come by.  You can grow your own, but this takes time.

Flowers  I got so caught up with food that I realized I didn’t plant many beautiful flowers that can serve multiple purposes.  I want them for cut flower arrangements as well as for medicinal purposes and sheer beauty.  Next year there will be flowers!

Edible Seeds:  I also want to get some edible seeds such as sunflower and pumpkin, yum!  Per square foot, sunflowers are one of the most productive foods you can grow, calorie wise.


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6 years ago

Basil, How To Grow More Than You Can Eat - Gardening at 58 North

~~~

Things I learned today #6

You can buy a single basil plant for around $5 or less, and take cuttings forever. Basil is an amazing plant and can be used for a lot of things! Including pesto, which you can make at home with a morter and pestal! (https://youtu.be/6-dOZezSwwM)


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6 years ago
8 Vegetables That You Can Regrow Again And Again.
8 Vegetables That You Can Regrow Again And Again.
8 Vegetables That You Can Regrow Again And Again.
8 Vegetables That You Can Regrow Again And Again.
8 Vegetables That You Can Regrow Again And Again.
8 Vegetables That You Can Regrow Again And Again.
8 Vegetables That You Can Regrow Again And Again.
8 Vegetables That You Can Regrow Again And Again.

8 vegetables that you can regrow again and again.

Scallions

You can regrow scallions by leaving an inch attached to the roots and place them in a small glass with a little water in a well-lit room.

Garlic

When garlic begins to sprout, you can put them in a glass with a little water and grow garlic sprouts. The sprouts have a mild flavor than garlic and can be added to salads, pasta and other dishes.

Bok Choy

Bok choy can be regrown by placing the root end in water in a well-lit area. In 1-2 weeks , you can transplant it to a pot with soil and grow a full new head.

Carrots

Put carrot tops in a dish with a little water. Set the dish in a well-lit room or a window sill.  You’ll have carrot tops to use in salads. 

Basil

Put clippings from basil with 3 to 4-inch stems in a glass of water and place it in direct sunlight. When the roots are about 2 inches long, plant them in pots to and in time it will grow a full basil plant.

Celery

Cut off the base of the celery and place it in a saucer or shallow bowl of warm water in the sun. Leaves will begin to thicken and grow in the middle of the base, then transfer the celery to soil. 

Romaine Lettuce

Put romaine lettuce stumps in a ½ inch of water. Re-water to keep water level at ½ inch. After a few days, roots and new leaves will appear and you can transplant it into soil.

Cilantro

The stems of cilantro will grown when placed in a glass of water. Once the roots are long enough, plant them in a pot in a well-lit room. You will have a full plant in a few months.


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6 years ago
Genius Gardening Hacks
Genius Gardening Hacks
Genius Gardening Hacks
Genius Gardening Hacks
Genius Gardening Hacks
Genius Gardening Hacks
Genius Gardening Hacks
Genius Gardening Hacks
Genius Gardening Hacks
Genius Gardening Hacks

Genius Gardening Hacks


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6 years ago
Artist Lucile Prache

Artist Lucile Prache

6 years ago

Right to Darkness/Right to Night

Human beings have lived with a relatively strict day/night cycle for as far back as humans have been around. Yes, there was fire, but the rooms were still relatively dim, and outside was almost always just lit by the moon. Daily darkness, where not much could get done has been a part of human culture and biology forever.

Now we have the problem of light polution, where the light of electricity spreads everywhere and then you can’t see the stars at night in the cities. Obviously it’s good that we have electric lights. There are many people who want to be out doing things at night. But it’s also a problem, because for most, nightime is a time of calm and processing the day, and it can be difficult for the human brain to know that it’s time for that to happen if it has too much light coming at it.

I think in Solunarpunk societies, people would have a recognized right to darkness/night, that made itself apparent in the design of light sources and buildings, so that anyone who wanted to could enjoy the dark, cool, and quiet regardless of where they live.

This could manifest as rules about how streetlights can be made, so that the designs that are used are the ones that have the least amount of light seepage

Possibly different light zones, so the bars and clubs and other nightime activity stuff is all in one area, so those people can be safely lit, while other neighborhoods have street lights that only come on if someone is walking there, and are as unobtrusive as possible, so that people can stargaze and sleep in peace.

Inside houses, there might be automatic window darkeners that activate whenever you turn on a light, so the outside isn’t affected, that then turn transparent when the light is off for long enough.

Most houses would have smart lighting with a “night mode” that kept the lighting warmer and dimmer. If you had no lights on, red floor lights will turn on if it senses you moving so you can see where you’re going in safety.

Or maybe people just start using their night vision for more things. People just don’t turn on the lights at night if they don’t have to.

I imagine that in a right to night would also mean that it would be expected that work ends at sunset. People are free to pursue their own passions at night, and are free of daytime responsibilities. No one could pressure someone to stay later than they wanted to, but especially after sunset, because that would be extremely rude and people would call them out for it.

Stargazing would become an important family activity. Children would grow up knowing the names of all the constellations they could see, as well as the names of the planets and the stars. A sense of wonder about our universe would begin to arise again in our society.

Any moon bases built in the future would be on the side of the moon that always faces away from us, just in case the light could be seen at night. There would be observation sites on the side facing Earth that are too small to be seen, but are connected to each other underground. These observation sites would be open and available all the time, for anyone to come and marvel at the beauty of our home planet.


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copperfingertips - Represent The Human Race
Represent The Human Race

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