Transistor lavet af balsatræ og ledende plast

Keder du dig i det gode vejr?

Find et (gammelt) modelfly og rip det for lidt balsatræ og du kan lave dine egne balsatransistorer. Ligninen fjernes og resten fyldes med ledende polymer ( PEDOT:PSS). Skriv her, hvis du får det til at virke :-)

Depletion p-channel FET-balsatransistoren er flere sekunder om at åbne og lukke. Så prototype trætransistoren eller rettere cellulosetransistoren kommer ikke til at erstatte 2N5462, BD512 eller IRF9540. I artiklen bliver FET-balsatransistoren testet ved 100mHz (milli-Hertz).

Måske kommer der tilbud i dit lokale byggemarked eller elektronikforretning; balsatræ til konstruktion af P-channel FET-transistorer?

Artikelomtale:

Linköping University. (2023, April 27). A transistor made of wood: Electrical current modulation in wood electrochemical transistor. ScienceDaily
https://www.sciencedaily.com/releases/2023/04/23 0427114509.htm
Citat: "...
The transistor developed by the Linköping researchers, however, can function continuously and regulate electricity flow without deteriorating.
The researchers used balsa wood to create their transistor, as the technology involved requires a grainless wood that is evenly structured throughout. They removed the lignin, leaving only long cellulose fibres with channels where the lignin had been.
These channels were then filled with a conductive plastic, or polymer, called PEDOT:PSS, resulting in an electrically conductive wood material.
[]
The researchers used this to build the wood transistor and could show that it is able to regulate electric current and provide continuous function at a selected output level. It could also switch the power on and off, albeit with a certain delay -- switching it off took about a second; on, about five seconds.
..."

Udgivet artikel - fri adgang med billeder af FET-balsatransistoren:

April 24, 2023, Van Chinh Tran, Gabriella G. Mastantuoni, Marzieh Zabihipour, Lengwan Li, Lars Berglund, Magnus Berggren, Qi Zhou, Isak Engquist. Electrical current modulation in wood electrochemical transistor. Proceedings of the National Academy of Sciences, 2023; 120 (18) DOI: 10.1073/pnas.2218380120
http://dx.doi.org/10.1073/pnas.2218380120
Citat: "...
We expect this device and concept will be a stepping stone for the development of wood-based electrical components.
...
During the last decades, cellulose, lignin, conducting polymers, and other organic or bio-based materials have emerged as potential templates or active components in various electrical devices (1, 2).
...
In a preliminary test, we observed that balsa performed better than birch or ash in preparing high–CW electrodes (SI Appendix, Fig. S2).
...
The assembly of a WECT is explained in Fig. 1B, where two pieces of CW (longitudinal × tangential × radial = 30 mm × 5 mm × 1 mm) were used as the bottom and the top gates (denoted as WECT-Gate). Another piece of CW (longitudinal × tangential × radial = 30 mm × 2 mm× 1 mm) was used as the transistor channel (WECT-Channel), while a cellulose/polyester lab tissue and a gel–electrolyte mixture were used as separator and electrolyte, respectively.
...
Output measurements are carried out to provide additional information about the performance of WECTs. Here, the drain–source voltage (VD) was swept from 0 to -6.0 V, while VG was increased in steps from 0 to 6.0 V. In Fig. 3C, the obtained ID–VD curves are shown. At VG = 0 V and VG = 1 V, we see that ID increases linearly with increasing VD and reaches a plateau at around VD = -3.5 V.
..."

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PS: Ved du ikke hvad en felteffekttransistor er, så læs om den her:
https://da.wikipedia.org/wiki/Felteffekttransist or

Nu også dansk omtale i medierne:

1. maj. 2023, videnskab.dk: Fremtidens ‘elektrænik’? Forskere bygger transistor af træ.
Den er lige lovlig stor, men den viser, at der kan være mange oversete muligheder for at udnytte biomasse i fremtidens elektronik.
https://videnskab.dk/teknologi/fremtidens-elektr aenik-forskere-bygger-transistor-af-trae /