Electronic Polymers and DNA Self‐Assembled in Nanowire Transistors

Hamedi, Mahiar; Elfwing, Anders; Gabrielsson, Roger; Inganäs, Olle

doi:10.1002/smll.201201771

Cited by 36 publications

(48 citation statements)

References 33 publications

(31 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The error on the Seebeck coeffi cient due to geometry of the Au electrodes is estimated to be about 4%. [ 21 ] For the mixed conductors at high humidity levels, the measurements are less stable and the error is about an additional 9%. The samples are introduced in a home-made climate chamber that allows controlling the relative humidity between 10% and 80%.…”

Section: Experimental Sectionsmentioning

confidence: 97%

Ionic Seebeck Effect in Conducting Polymers

Wang

Ail

Gabrielsson

et al. 2015

Advanced Energy Materials

Self Cite

200

227

View full text Add to dashboard Cite

have been reported in inorganic ionic solids [ 15 ] and electrolytes, [ 16,17 ] where ions are the only charge carriers. But to the best of our knowledge, the ionic thermoelectric effect in conducting polymers has not been studied and reported before.Here, we investigate the role of ions in the thermoelectric response of different PEDOT derivatives. We observe surprisingly large increases in the thermo-induced voltage at high humidity levels, of up to several hundreds of µV/K, which is identifi ed as an ionic Seebeck effect. The ionic thermovoltage and its potential for improving the thermoelectric effi ciency in conducting polymers are discussed.Five different PEDOT derivatives of different electrical conductivities (measured at 10% RH, 300 K) are deposited on glass substrates including two gold electrode patterns separated by 1 mm: (i) PEDOT-Tos (thickness = 627 nm, σ = 15 200 S m −1 ) synthesized by using solution oxidative in situ polymerization, [ 18 ] (ii) PEDOT-PSS-DEG (4.75 µm, σ = 530 S m −1 ) obtained by the addition of 2 wt% of the secondary dopant diethylene glycol (DEG) [ 19 ] into the PEDOT-PSS dispersion, (iii) PEDOT-PSS (5.68 µm, σ = 14 S m −1 ) as the commercial water dispersion called Baytron P by H. C. Starck, (iv) PEDOT-PSSPSSNa (3.43 µm, σ = 0.08 S m −1 ) obtained by the addition of 2 wt% of PSSNa to the PEDOT-PSS dispersion, and (v) selfdoped PEDOT-S (116 nm, σ = 75 S m −1 ), in which the sulfonate dopant groups are covalently linked to the PEDOT chains. PEDOT-S has been synthesized in the lab. [ 20 ] PEDOT-Tos exhibits the highest electrical conductivity. PEDOT-Tos possesses a high density of conducting PEDOT chains (EDOT/sulfonate molar ratio is 2.7) packed in a paracrystalline structure. [ 18 ] In PEDOT-Tos, the tosylate moieties are the anions and balance the positive charges carried along the conducting polymer chains. The included ions are effectively immobile in the polymer; it is an electronic (hole) conductor. In PEDOT-S, the EDOT/sulfonate ratio is 1.

show abstract

Section: Experimental Sectionsmentioning

confidence: 97%

Ionic Seebeck Effect in Conducting Polymers

Wang

Ail

Gabrielsson

et al. 2015

Advanced Energy Materials

Self Cite

200

227

View full text Add to dashboard Cite

show abstract

“…[11][12][13] One route to achieve water-solubility in conducting polymers is to introduce charged side groups to the monomer. Such covalently bonded substituents may also make the resulting polymer self-doped, 14 meaning that the required counter ion during doping is a side group of the polymer chain itself.…”

Section: Introductionmentioning

confidence: 99%

Electronic Control over Detachment of a Self-Doped Water-Soluble Conjugated Polyelectrolyte

Persson

Gabrielsson

Sawatdee³

et al. 2014

Langmuir

Self Cite

View full text Add to dashboard Cite

Water-soluble conducting polymers are of interest to enable more versatile processing in aqueous media as well as to facilitate interactions with biomolecules. Here, we report a substituted poly(3,4-ethylenedioxythiophene) derivative (PEDOT-S:H) that is fully water-soluble and selfdoped. When electrochemically oxidizing a PEDOT-S:H thin film, the film detaches from the under-laying electrode. The oxidation of PEDOT-S:H starts with an initial phase of swelling followed by cracking before it finally disrupts into small flakes and detaches from the electrode.We investigated the detachment mechanism and found that parameters such as the size, charge and concentration of ions in the electrolyte, the temperature and also the pH influence the characteristics of detachment. When oxidizing PEDOT-S:H, the positively charged polymer backbone is balanced by anions from the electrolyte solution and also by the sulphonate groups 2 on the side chains (more self-doping). From our experiments, we conclude that detachment of the PEDOT-S:H film upon oxidation occurs in part due to swelling caused by an inflow of solvated anions and associated water, and in part due to chain rearrangements within the film, caused by more self-doping. We believe that PEDOT-S:H detachment can be of interest in a number of different applications, including addressed and active control of the release of materials such as biomolecules and cell cultures.

show abstract

“…Firstly, recombinant amelogenin forms such nanospherical entities when suspended in water, but their existence in vivo has not been accurately pinpointed to this date. DNA molecules assemble into a variety of morphologies, from cubes to triangles to pentagons to hexagons to octahedrons (Aldaye et al 2008) and could be used for the assembly of nanoparticles into superlattices (Young et al 2014) and other sophisticated geometries that are otherwise difficult to obtain (Liu et al 2013) wherefrom their use in organic electronics has begun to be intensely researched as well (Hamedi et al 2012). None of these potentially practical potentials of DNA need be necessarily tied to its biological function as a storage place for the genetic content of the cell.…”

Section: 3 the Basic Model Of Amelogenesis And A Question Mark Ovementioning

confidence: 99%

Amelogenin in Enamel Tissue Engineering

Uskoković

2015

Engineering Mineralized and Load Bearing Tissues

View full text Add to dashboard Cite

In this chapter the basic premises, the recent findings and the future challenges in the use of amelogenin for enamel tissue engineering are being discoursed on. Results emerging from the experiments performed to assess the fundamental physicochemical mechanisms of the interaction of amelogenin, the main protein of the enamel matrix, and the growing crystals of apatite, are mentioned, alongside a moderately comprehensive literature review of the subject at hand. The clinical importance of understanding this protein/mineral interaction at the nanoscale are highlighted as well as the potential for tooth enamel to act as an excellent model system for studying some of the essential aspects of biomineralization processes in general. The dominant paradigm stating that amelogenin directs the uniaxial growth of apatite crystals in enamel by slowing down the growth of (hk0) faces on which it adheres is being questioned based on the results demonstrating the ability of amelogenin to promote the nucleation and crystal growth of apatite under constant titration conditions designed to mimic those present in the developing enamel matrix. The role of numerous minor components of the enamel matrix is being highlighted as essential and impossible to compensate for by utilizing its more abundant ingredients only. It is concluded that the three major aspects of amelogenesis outlined hereby – (1) the assembly of amelogenin and other enamel matrix proteins, (2) the proteolytic activity, and (3) crystallization – need to be in precise synergy with each other in order for the grounds for the proper imitation of amelogenesis in the lab to be created.

show abstract

Electronic Polymers and DNA Self‐Assembled in Nanowire Transistors

Cited by 36 publications

References 33 publications

Ionic Seebeck Effect in Conducting Polymers

Ionic Seebeck Effect in Conducting Polymers

Electronic Control over Detachment of a Self-Doped Water-Soluble Conjugated Polyelectrolyte

Amelogenin in Enamel Tissue Engineering

Contact Info

Product

Resources

About