Electric-wave oscillator

FIELD: semiconductor engineering; biology, ecology, and medicine.

SUBSTANCE: proposed electric-wave oscillator producing relaxation oscillations whose frequencies can be varied within wide range without changing supply voltage or current has its semiconductor structure built around liquid solutions of p and n organic materials with needle electrodes immersed in n-type liquid organic semiconductor and electrode immersed in p-type semiconductor. Liquid p semiconductor may be 1-20% aqueous solution of fuchsin triphenyl methane die or aqueous solution of methylene blue organic die of 1-20% concentration, or aqueous solution of glucose of 1-50% concentration. Aniline can be used as n-type liquid semiconductor.

EFFECT: ability of producing relaxation oscillations close in their parameters to those noted in biological objects.

5 cl 1 dwg, 3 tbl

 

The invention relates to the field of semiconductors, and in particular to structures, assembled from a liquid organic semiconductors based on their properties, which can be widely used in biology, ecology and medicine.

Known semiconductor oscillator with tunable frequency, containing a monocrystalline silicon plate with two pins, zinc alloy with a concentration of NZnand a donor impurity concentration of the ND. Silicon has a resistivity ρ≥104Ohm×cm, and the distance between contacts no more than a diffusion length of electrons at a ratio of dopants in silicon NZn≥ND. When a potential difference of 50 between an injecting contact and the flow of current between the anode and cathode obtained tunable frequency current in the range 10-105Hz (A.S. No. 782641, SU, IPC H 01 L 29/86).

Known generator containing a shielded cover, made of a material, thermal expansion coefficient of which is smaller than that of the base material, on which is placed a substrate of dielectric material with active and passive elements. Around the perimeter of the base is made of a rectangular groove is 0.5-0.8 thickness of the Foundation (A.S. No. 1429278, RU, IPC H 03 7/14).

The closest analogue to the proposed device is TBE is to give rise to a generator of low frequency on the basis of a semiconductor silicon wafer of n-type size 1× 1 mm2with two aluminum contact (anode and cathode), located at a distance of the order of the active region (˜100 μm), in the form of a wire of diameter d=20 μm and an area in which implemented the conditions for the emergence of oscillations electroaerosol plasma type recombination waves. On the surface of the semiconductor wafer includes an insulator - oxide layer thickness d=0.2 μm, on which is deposited a metal layer that serves as managing contact. Changing the bias voltage applied to the metal contact located on the oxide layer, deposited on the surface of the semiconductor, it is possible to control the characteristics of the current (amplitude and frequency). The generator on the basis of MIS-structures has such features: region generated frequencies 40-400 Hz, the amplitude of oscillation of 0.5-50 mV, is used to supply voltage To 1-5 (A.S. No. 439255, RU, IPC H 01 L 29/00).

However, the above mentioned generators based on the use of solid elements. Physico-chemical properties of such solid-state structures have sharp contrast to biological objects (geometry, shape, density, aggregate state of matter etc), prolonged contact with them leads to complications, making significant changes in a biological system, and thereby hinders their application in biology and medicine is E.

The technical problem of the invention was to create a generating device with relaxation oscillations, the frequency of which would change in a wide range when the change in the voltage or current and would be similar to the oscillations observed in biological objects.

To solve the technical problem is proposed generator of electrical oscillations, consisting of a semiconductor structure formed by liquid n-type semiconductors and p-type. In liquid n-type semiconductor is immersed two electrodes, and a liquid solution of organic semiconductor p-type introduced one electrode.

As a liquid semiconductor p-type used aqueous solutions of organic substances: casinoby dye - methylene blue, a substance from the group of Magenta dyes - Magenta, or sugar, for example glucose. And as liquid n-type semiconductor used aromatic amine is aniline.

The invention is illustrated in the drawing, which presents a schematic diagram of the generator in operation.

Liquid semiconductor p-type 1, liquid organic n-type semiconductor 2, the negative electrode, immersed in an organic n-type semiconductor 3; an electrode immersed in an organic n-type semiconductor 4; an electrode immersed in an organic semiconductor is p-type is 5; resistance 6, which was filmed relaxation oscillations; a power source 7, which creates a potential difference between the electrodes 3 and 4 are immersed in the n-type semiconductor 1; key 8, microammeter 9, a DC voltage of 10, for supplying a constant current between the electrodes 4 and 5, a high-resistance resistor 11.

The emergence of the relaxation oscillations associated with the accumulation of nonequilibrium carriers at the contact boundary between the organic semiconductor is n-semiconductor and is a result of recharging the electric field of the surface centers ("fast" States). With some critical value attached to the n-type semiconductor voltage field in the surface layer becomes sufficient for a transfer of electrons from the surface States in the conduction band. This leads to a lowering of the barrier and to a sharp decrease in the resistance of the surface layer. As a result, the electrons again captured at the levels of the n-type semiconductor. The process then repeats.

Specific example 1.

To create a generator of electrical oscillations used a plastic tub with a width of 5 mm and a depth of 3 mm (not shown). Bath can be used dielectric materials, such as fiberglass, turbonit, rubber, etc. the results of the experimental study is any showed the selection of the above materials baths parameters of the oscillations does not depend. In the tub, poured into 10% aqueous solution of the dye methylene blue as an organic semiconductor p-type 1 in the amount of 2.4×10-6DM3. Then use the syringe to chromatography on it put a layer of aniline (H) in an amount of 1.6×10-6DM3which is the n-type semiconductor 2. In aniline immersed two electrodes 3 and 4 made in the form of copper needles d=0.25 mm, galvanically treated with tin. The power source 7 was created on the electrodes 3 and 4 are negative and positive potentials, respectively. Key 8 in the circuit between the electrodes 4 and 5 was open. Between the electrodes 3 and 4 connected the resistor 6 a resistance of 200 Ohms, which is with an oscilloscope (figure not shown) fixed electrical oscillations, the amplitude of which was equal to 10 mA and a frequency of 950 Hz. The potential difference was equal to 30 C.

Example 2 similar to example 1, with the difference that between immersed in the semiconductor p-type 1 electrode 5 and between the electrode 4 was connected microammeter 9, the DC power supply 10 having an EMF equal to 9, and high resistance resistor 11 a resistance of 1 Mω. After that the switch 8 is closed, between the electrodes 4 and 5 were additionally asked current of 50 μa and the resistor 6 has an electric oscillations of the Rea application potential difference 5 between the electrodes 3 and 4. The frequency of the relaxation oscillations when this was 20 kHz and the amplitude was equal to 2 μa.

Example 3 same as example 2, but as a liquid semiconductor p-type took aqueous solution triphenylmethane dye fuchsin different concentrations in 5% steps from 1 to 20%. The increase in the concentration of fuchsin more than 20% does not affect the output parameters. The data obtained are shown in table 1.

Example 4 same as example 2, except that as a liquid semiconductor p-type 1 used an aqueous solution casinomaha dye methylene blue in various concentrations in 5% steps from 1 to 20%. The increase in the concentration casinomaha dye methylene blue more than 20% does not affect the output parameters. The data obtained are shown in table 1.

Example 5 same as example 2, but as a liquid semiconductor p-type used aqueous glucose solutions of different concentrations in 10% increments from 1 to 50%. The increase of glucose concentration more than 50% has no effect on the output parameters. The data obtained are shown in table 1.

Table 1.
The dependence of vibration parameters from type semiconductor p-type and its concentration
no examplesSemiconductor p-typeTo the focus of an aqueous solution The frequency of oscillation, HzThe amplitude of the generated oscillations, BSupply voltage, V
3Triphenyl-methane dye Magenta1%150,0230
5%6000,0830
10%14000,8530
15%82001,4630
20%100001,830
4Casinoby dye methylene blue1%180,0330
5%4500,1530
10%13000,930
15%75001,530
20%98001,8530
5An aqueous solution of glucose1%120,1530
10%3800,530
20%13001,230
30%7600 1,3530
40%8200to 1.8630
50%9600230

Example 6 same as example 2, but the distance between the electrodes 3, 4, immersed in an organic n-type semiconductor 2, changed in increments of 0.5 mm between the electrodes 4 and 5 were submitted to a fixed value of current of 50 μa, resulting in a changed frequency, the oscillation amplitude and the critical voltage, steady-state oscillation. The data obtained is displayed in table 2.

Table 2.
The dependence of the critical voltage of occurrence of fluctuations of the distance between the electrodes 3 and 4, is introduced into the n-type semiconductor
Semiconductor p-typeThe distance between the electrodes 3 and 4 mmThe frequency of oscillation, HzThe amplitude of the generated oscillations, InThe critical voltage of occurrence of vibrations
Triphenylmethane dye Magenta0,510000001,85,8
1,0820001,466,4
1,514000,856,8
2,06000,087,0
2,550,028,2
Casinoby dye Methylene blue0,596000001,55,5
1,0850001,366,3
1,527000,926,9
2,04500,087,8
2,560,018,1
Glucose0,593000001,726,7
1,06200of 1.347,3
1,519000,657,6
2,03200,078,7
2,510,0159,15

Greater distance set is impractical because the oscillations are not observed.

Example 7 same as example 1, except that the distance between the electrodes 3 and 4 was set to 2.8 mm and changing the potential difference applied between them. The data obtained is displayed in table 3.

Table 3.

Head of the dependence of vibration parameters from the supply voltage
Semiconductor p-typeno experienceThe potential difference between the electrodes 3 and 4, InThe frequency of oscillation, HzThe amplitude of the generated oscillations, InThe distance between the electrodes 3 and 4 mm
triphenyl-methane dye-Magenta120--2,8
230550,12,8
34021600,42,8
45053200,92,8
560653401,52,8
67093582101,92,8
780--2,8
Casinoby dye - methylene blue820--2,8
9301550,22,8
104025700,452,8
1150105301,1,8
1260654501,62,8
137096987301,952,8
1480--2,8
Glucose1520--2,8
1630950,052,8
17409600,32,8
185072600,82,8
1960756301,452,8
207094692201,852,8
2180--2,8

In experiments 1, 8, 15 oscillations were observed for the reason that the voltage supplied from the power source 7, was less than 30, namely the 20th Century In experiments 7, 14, 21 oscillations were not observed because the voltage supplied from the power source 7, was more than 70, namely 80, which disturbs the structure of liquid semiconductors. The results of the experiments 2-5, 9-12, 16-19 suggests that the observed variations on the parameters nl is Skye to fluctuations in biological objects.

1. A generator of electrical oscillations, containing the semiconductor structure with electrical contacts, characterized in that the semiconductor structures used liquid solutions of organic substances n-type and p-type submerged needle electrodes in the liquid organic n-type semiconductor and an electrode immersed in the semiconductor is p-type.

2. The generator according to claim 1, characterized in that as the liquid semiconductor p-type used 1-20%aqueous solution triphenylmethane dye Magenta.

3. The generator according to claim 1, characterized in that as the liquid semiconductor is p-type is used an aqueous solution of organic dye methylene blue concentration of 1-20%.

4. The generator according to claim 1, characterized in that as the liquid semiconductor is p-type is used an aqueous solution of glucose concentration of 1-50%.

5. The generator according to claim 2, characterized in that as the liquid n-type semiconductor aniline used.



 

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