CNT and organic FET based two-way transducers of the (bio)electric signals

CNT and organic FET based two-way transducers of the (bio)electric signals Dr. Ing Rostyslav Sklyar, Independent Researcher, Lviv, Ukraine

Relationships between the measured quantity and specific variants of an OFET device OFET types transducing quantity

O rg anic liquid

CNT

ion ic c ur re nt

transduced m o lecular medium

n erv e im pu lse

Sup ere xcha n ge

O rg a nic sem ic on d.

elec tr o nic c u rr ent

ohm ic

sem ico nd .

Types of the Currents- Electronic and Ionic (Molecular)

Array of Nanowires

At this size scale chemical control over molecular properties is highly developed. FETs fabricated at these wiring densities might exhibit nonstatistical and perhaps unpredictable, behavior.

Examples of Molecular Transport Junction

The observed conduction in molecular junction usually differs radically from that in traditional ohmic wires. Even with no applied bias voltage, the energy landscape between donor and acceptor components is asymmetric.

The Transducing Mechanism: Implantable (Channel) and External (Nanocoil).

Equivalent SuOFETTr as the inclusion of a SuOFET device into the nerve fibre. SuOFETTr

circuit of a of vortical magnetic field H around a biochemical medium.

A- implantation of the whole SuOFET variant; B- tapping of the signal on the external SuOFET by implantable wire contacts.

A

myel in

B

i

SuOFET

c hannel‘s

Vg Voutbio

nerve NI impulse

Draine transmitting Cin/2

gDS

ionic currents

SuOFET SF ET

× JJ

gate

Source

visual and m un

receiving unit

Rgate

- +

°

d bi t

d

d it

i

(

~

Nerve fibre, s ynap ses of neu rons, or nanowir e

el

SuOFE T

Draine

g DS C0

L

H

VGS

(Bio)Telemetry

i

…

E0

Gate

Cryostat following external units

in vivo

VGS

unit

R

Cin/2

axons

Fi 1 A SFET b

nanocoil

× JJ

C in/2

R gat e

- + Cin /2

Gate

°

V GS

Sourc e

Cryosta t

Shield

JJ- indic ate s Josephson junct ion.

lb h i

Q hω (Q ) = G + T G 1 − 1 − (ibio / I 0 ) 2 C 2e

)

2

(E N) =4kTSuFET γ noise /gdn

and

gdn =I0/VC

Superconducting Organic and CNT FET Variants An organic SuFET device and its electrodes.

Schematic of the elect rolyte gate measurement.

A 4 by 4 c rossed N W-FET array

U out

i

i bio

Vo ut

Operational pattern of a parallel SuOFETTr.

OFET o f organic single crystals with bottomcontact configuration.

A- the schematic structure of the fabricated OFET; B- transfer characteristics of the single crystal FET device at a source-drain voltage Vd of -30 V. A

B

A

bio

B

Q, nS

400 -

t

200

i

-

I bi o

0

1

Vsup=const

t

Vout

V g, V

Dependence of the Received Signals’ Parameters on the Mode of SuOFETTr’s Functioning Mode

Serial

Medium

NI, el. current

external

∫i

=1control or

sign

sensing impulse

∫ signals→bio and Molecules

Parallel implantable

i sign=i signf 1)+ i sign (f 2)+… +i sign (f N)

external

di sign/dt, di sign/dx

implantable

Σi sign=1 network or 1 fibre

variation of Ss→concentr. of

chem. molecules

ΣSs=1 type of

ΣSs=Σbio and

molec.

chem. molec.

molecules decoding the propagation of the

DNA, nanowire

signal along DNA’s spirals or nanowire

signals of nucleoted recognition

space and length dynamic on both spirals or wires

4 nucleoteds → 4 outputs

The author’s contact information: Verchratskogo st. 15-1, Lviv 79010 Ukraine.

Tel. +38 097 3365495 Fax:+38 0322 769613 Webpage: www.tsp.lviv.ua/~sklyar