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Items: 1 to 50 of 86

1.

Pretransitional behavior of viscoelastic parameters at the nematic to twist-bend nematic phase transition in flexible n-mers.

Parsouzi Z, Babakhanova G, Rajabi M, Saha R, Gyawali P, Turiv T, Wang H, Baldwin AR, Welch C, Mehl GH, Gleeson JT, Jakli A, Lavrentovich OD, Sprunt S.

Phys Chem Chem Phys. 2019 Jun 28;21(24):13078-13089. doi: 10.1039/c9cp00984a. Epub 2019 Jun 6.

PMID:
31168534
2.

Dynamic response of large tilt-angle flexoelectro-optic liquid crystal modulators.

Fells JAJ, Welch C, Yip WC, Elston SJ, Booth MJ, Mehl GH, Wilkinson TD, Morris SM.

Opt Express. 2019 May 27;27(11):15184-15193. doi: 10.1364/OE.27.015184.

PMID:
31163718
3.

Fast and low loss flexoelectro-optic liquid crystal phase modulator with a chiral nematic reflector.

Wang X, Fells JAJ, Yip WC, Ali T, Lin JD, Welch C, Mehl GH, Booth MJ, Wilkinson TD, Morris SM, Elston SJ.

Sci Rep. 2019 May 7;9(1):7016. doi: 10.1038/s41598-019-42831-5.

4.

Mobile Technology for Community Health in Ghana: Is Maternal Messaging and Provider Use of Technology Cost-Effective in Improving Maternal and Child Health Outcomes at Scale?

Willcox M, Moorthy A, Mohan D, Romano K, Hutchful D, Mehl G, Labrique A, LeFevre A.

J Med Internet Res. 2019 Feb 13;21(2):e11268. doi: 10.2196/11268.

5.

1H NMR study of molecular order and dynamics in the liquid crystal CB-C9-CB.

Aluculesei A, Cachitas H, Carvalho J, Vaca Chavez F, Figueirinhas JL, Sebastião PJ, Cruz C, Tamba MG, Kohlmeier A, Mehl GH.

Phys Chem Chem Phys. 2019 Feb 20;21(8):4523-4537. doi: 10.1039/c8cp06868b.

PMID:
30735227
6.

Proton and Deuterium NMR Study of the CBC9CB Dimer System.

Carvalho J, Cruz C, Figueirinhas JL, Tamba MG, Kohlmeier A, Mehl GH.

J Phys Chem B. 2019 Feb 14;123(6):1442-1451. doi: 10.1021/acs.jpcb.8b11526. Epub 2019 Feb 4.

PMID:
30649883
7.

The State of Digital Interventions for Demand Generation in Low- and Middle-Income Countries: Considerations, Emerging Approaches, and Research Gaps.

Gibson DG, Tamrat T, Mehl G.

Glob Health Sci Pract. 2018 Oct 10;6(Suppl 1):S49-S60. doi: 10.9745/GHSP-D-18-00165. Print 2018 Oct 10. Review.

8.

Digital Health and Health Systems of the Future.

Labrique A, Vasudevan L, Mehl G, Rosskam E, Hyder AA.

Glob Health Sci Pract. 2018 Oct 10;6(Suppl 1):S1-S4. doi: 10.9745/GHSP-D-18-00342. Print 2018 Oct 10. No abstract available.

9.

Dynamic calorimetry and XRD studies of the nematic and twist-bend nematic phase transitions in a series of dimers with increasing spacer length.

Stevenson WD, Zou HX, Zeng XB, Welch C, Ungar G, Mehl GH.

Phys Chem Chem Phys. 2018 Oct 10;20(39):25268-25274. doi: 10.1039/c8cp05744c.

PMID:
30276414
10.

Flexoelectro-optic liquid crystal analog phase-only modulator with a 2π range and 1  kHz switching.

Fells JAJ, Wang X, Elston SJ, Welch C, Mehl GH, Booth MJ, Morris SM.

Opt Lett. 2018 Sep 15;43(18):4362-4365. doi: 10.1364/OL.43.004362.

PMID:
30211871
11.

Supramolecular organization of liquid-crystal dimers - bis-cyanobiphenyl alkanes on HOPG by scanning tunneling microscopy.

Krzyżewska K, Jaroch T, Maranda-Niedbała A, Pociecha D, Górecka E, Ahmed Z, Welch C, Mehl GH, Proń A, Nowakowski R.

Nanoscale. 2018 Aug 30;10(34):16201-16210. doi: 10.1039/c8nr02069h.

PMID:
30123918
12.

Digital health vision: could MomConnect provide a pragmatic starting point for achieving universal health coverage in South Africa and elsewhere?

Mehl GL, Tamrat T, Bhardwaj S, Blaschke S, Labrique A.

BMJ Glob Health. 2018 Apr 24;3(Suppl 2):e000626. doi: 10.1136/bmjgh-2017-000626. eCollection 2018. No abstract available.

13.

Tuning selective reflection of light by surface anchoring in cholesteric cells with oblique helicoidal structures.

Iadlovska OS, Maxwell GR, Babakhanova G, Mehl GH, Welch C, Shiyanovskii SV, Lavrentovich OD.

Opt Lett. 2018 Apr 15;43(8):1850-1853. doi: 10.1364/OL.43.001850.

PMID:
29652381
14.

eSexual health interventions: promising, but more evidence needed.

Wellings K, Mehl GL, Free CJ.

Lancet Public Health. 2017 Apr;2(4):e162-e163. doi: 10.1016/S2468-2667(17)30051-8. Epub 2017 Mar 20. No abstract available.

15.

Characterization of the Submicrometer Hierarchy Levels in the Twist-Bend Nematic Phase with Nanometric Helices via Photopolymerization. Explanation for the Sign Reversal in the Polar Response.

Panov VP, Sreenilayam SP, Panarin YP, Vij JK, Welch CJ, Mehl GH.

Nano Lett. 2017 Dec 13;17(12):7515-7519. doi: 10.1021/acs.nanolett.7b03441. Epub 2017 Nov 27.

PMID:
29136474
16.

Molecular organization in the twist-bend nematic phase by resonant X-ray scattering at the Se K-edge and by SAXS, WAXS and GIXRD.

Stevenson WD, Ahmed Z, Zeng XB, Welch C, Ungar G, Mehl GH.

Phys Chem Chem Phys. 2017 May 31;19(21):13449-13454. doi: 10.1039/c7cp01404j.

17.

Mobile Technology for Community Health in Ghana: what happens when technical functionality threatens the effectiveness of digital health programs?

LeFevre AE, Mohan D, Hutchful D, Jennings L, Mehl G, Labrique A, Romano K, Moorthy A.

BMC Med Inform Decis Mak. 2017 Mar 14;17(1):27. doi: 10.1186/s12911-017-0421-9.

18.

Light scattering study of the "pseudo-layer" compression elastic constant in a twist-bend nematic liquid crystal.

Parsouzi Z, Pardaev SA, Welch C, Ahmed Z, Mehl GH, Baldwin AR, Gleeson JT, Lavrentovich OD, Allender DW, Selinger JV, Jakli A, Sprunt S.

Phys Chem Chem Phys. 2016 Nov 23;18(46):31645-31652.

PMID:
27834978
19.

eRegistries: indicators for the WHO Essential Interventions for reproductive, maternal, newborn and child health.

Flenady V, Wojcieszek AM, Fjeldheim I, Friberg IK, Nankabirwa V, Jani JV, Myhre S, Middleton P, Crowther C, Ellwood D, Tudehope D, Pattinson R, Ho J, Matthews J, Bermudez Ortega A, Venkateswaran M, Chou D, Say L, Mehl G, Frøen JF.

BMC Pregnancy Childbirth. 2016 Sep 30;16(1):293.

20.

Mesophase structure and behaviour in bulk and restricted geometry of a dimeric compound exhibiting a nematic-nematic transition.

Sebastián N, Tamba MG, Stannarius R, de la Fuente MR, Salamonczyk M, Cukrov G, Gleeson J, Sprunt S, Jákli A, Welch C, Ahmed Z, Mehl GH, Eremin A.

Phys Chem Chem Phys. 2016 Jul 28;18(28):19299-308. doi: 10.1039/c6cp03899a. Epub 2016 Jul 4.

PMID:
27375037
21.

Anomalous Increase in Nematic-Isotropic Transition Temperature in Dimer Molecules Induced by a Magnetic Field.

Salili SM, Tamba MG, Sprunt SN, Welch C, Mehl GH, Jákli A, Gleeson JT.

Phys Rev Lett. 2016 May 27;116(21):217801. doi: 10.1103/PhysRevLett.116.217801. Epub 2016 May 26.

PMID:
27284674
22.

Added Alkane Allows Thermal Thinning of Supramolecular Columns by Forming Superlattice-An X-ray and Neutron Study.

Yen MH, Chaiprapa J, Zeng X, Liu Y, Cseh L, Mehl GH, Ungar G.

J Am Chem Soc. 2016 May 11;138(18):5757-60. doi: 10.1021/jacs.6b01172. Epub 2016 Apr 27.

23.

Second harmonic light scattering induced by defects in the twist-bend nematic phase of liquid crystal dimers.

Pardaev SA, Shamid SM, Tamba MG, Welch C, Mehl GH, Gleeson JT, Allender DW, Selinger JV, Ellman B, Jakli A, Sprunt S.

Soft Matter. 2016 May 11;12(19):4472-82. doi: 10.1039/c6sm00585c.

PMID:
27089236
24.

Thermal optical non-linearity of nematic mesophase enhanced by gold nanoparticles--an experimental and numerical investigation.

Kurochkin O, Murugesan YK, Bennett TP, D'Alessandro G, Reznikov Y, Tang BJ, Mehl GH, Kaczmarek M.

Phys Chem Chem Phys. 2016 Apr 28;18(16):11503-12. doi: 10.1039/c6cp00116e.

PMID:
27063912
25.

Guidelines for reporting of health interventions using mobile phones: mobile health (mHealth) evidence reporting and assessment (mERA) checklist.

Agarwal S, LeFevre AE, Lee J, L'Engle K, Mehl G, Sinha C, Labrique A; WHO mHealth Technical Evidence Review Group.

BMJ. 2016 Mar 17;352:i1174. doi: 10.1136/bmj.i1174. No abstract available.

PMID:
26988021
26.

Similarities and differences between molecular order in the nematic and twist-bend nematic phases of a symmetric liquid crystal dimer.

Emsley JW, Lelli M, Joy H, Tamba MG, Mehl GH.

Phys Chem Chem Phys. 2016 Apr 14;18(14):9419-30. doi: 10.1039/c5cp07304a.

PMID:
26979277
27.

eRegistries: Electronic registries for maternal and child health.

Frøen JF, Myhre SL, Frost MJ, Chou D, Mehl G, Say L, Cheng S, Fjeldheim I, Friberg IK, French S, Jani JV, Kaye J, Lewis J, Lunde A, Mørkrid K, Nankabirwa V, Nyanchoka L, Stone H, Venkateswaran M, Wojcieszek AM, Temmerman M, Flenady VJ.

BMC Pregnancy Childbirth. 2016 Jan 19;16:11. doi: 10.1186/s12884-016-0801-7.

28.

The stabilisation of the Nx phase in mixtures.

Ramou E, Ahmed Z, Welch C, Karahaliou PK, Mehl GH.

Soft Matter. 2016 Jan 21;12(3):888-99. doi: 10.1039/c5sm01961c. Epub 2015 Nov 9.

PMID:
26549345
29.

Helically Twisted Chiral Arrays of Gold Nanoparticles Coated with a Cholesterol Mesogen.

Cseh L, Mang X, Zeng X, Liu F, Mehl GH, Ungar G, Siligardi G.

J Am Chem Soc. 2015 Oct 14;137(40):12736-9. doi: 10.1021/jacs.5b05059. Epub 2015 Oct 2.

30.

Unmet Need: Improving mHealth Evaluation Rigor to Build the Evidence Base.

Mookherji S, Mehl G, Kaonga N, Mechael P.

J Health Commun. 2015;20(10):1224-9. doi: 10.1080/10810730.2015.1018624. Epub 2015 Jun 4.

PMID:
26042660
31.

On the structure of the Nx phase of symmetric dimers: inferences from NMR.

Hoffmann A, Vanakaras AG, Kohlmeier A, Mehl GH, Photinos DJ.

Soft Matter. 2015 Feb 7;11(5):850-5. doi: 10.1039/c4sm02480j.

PMID:
25571939
32.

Prioritizing integrated mHealth strategies for universal health coverage.

Mehl G, Labrique A.

Science. 2014 Sep 12;345(6202):1284-7. doi: 10.1126/science.1258926.

PMID:
25214614
33.

Direct observation of liquid crystals using cryo-TEM: specimen preparation and low-dose imaging.

Gao M, Kim YK, Zhang C, Borshch V, Zhou S, Park HS, Jákli A, Lavrentovich OD, Tamba MG, Kohlmeier A, Mehl GH, Weissflog W, Studer D, Zuber B, Gnägi H, Lin F.

Microsc Res Tech. 2014 Oct;77(10):754-72. doi: 10.1002/jemt.22397. Epub 2014 Jul 5.

PMID:
25045045
34.

Using the lives saved tool (LiST) to model mHealth impact on neonatal survival in resource-limited settings.

Jo Y, Labrique AB, Lefevre AE, Mehl G, Pfaff T, Walker N, Friberg IK.

PLoS One. 2014 Jul 11;9(7):e102224. doi: 10.1371/journal.pone.0102224. eCollection 2014. Erratum in: PLoS One. 2014;9(8):e106980.

35.

The Design and Investigation of Nanocomposites Containing Dimeric Nematogens and Liquid Crystal Gold Nanoparticles with Plasmonic Properties Showing a Nematic-Nematic Phase Transition (Nu-Nx/Ntb).

Tamba MG, Yu CH, Tang BJ, Welch C, Kohlmeier A, Schubert CP, Mehl GH.

Materials (Basel). 2014 Apr 30;7(5):3494-3511. doi: 10.3390/ma7053494.

36.

Surface alignment, anchoring transitions, optical properties, and topological defects in the thermotropic nematic phase of organo-siloxane tetrapodes.

Kim YK, Senyuk B, Shin ST, Kohlmeier A, Mehl GH, Lavrentovich OD.

Soft Matter. 2014 Jan 21;10(3):500-9. doi: 10.1039/c3sm52249k.

PMID:
24651889
37.

Nematic twist-bend phase with nanoscale modulation of molecular orientation.

Borshch V, Kim YK, Xiang J, Gao M, Jákli A, Panov VP, Vij JK, Imrie CT, Tamba MG, Mehl GH, Lavrentovich OD.

Nat Commun. 2013;4:2635. doi: 10.1038/ncomms3635.

38.

mHealth innovations as health system strengthening tools: 12 common applications and a visual framework.

Labrique AB, Vasudevan L, Kochi E, Fabricant R, Mehl G.

Glob Health Sci Pract. 2013 Aug 6;1(2):160-71. doi: 10.9745/GHSP-D-13-00031. eCollection 2013 Aug.

39.

Effective health interventions for adolescents that could be integrated with human papillomavirus vaccination programs.

Broutet N, Lehnertz N, Mehl G, Camacho AV, Bloem P, Chandra-Mouli V, Ferguson J, Dick B.

J Adolesc Health. 2013 Jul;53(1):6-13. doi: 10.1016/j.jadohealth.2013.02.022. Epub 2013 May 1. Review.

PMID:
23643336
40.

Modernising vital registration systems: why now?

Oomman N, Mehl G, Berg M, Silverman R.

Lancet. 2013 Apr 20;381(9875):1336-1337. doi: 10.1016/S0140-6736(13)60847-8. No abstract available.

PMID:
23602229
41.

Capacitance and optical studies of elastic and dielectric properties in an organosiloxane tetrapode exhibiting a N(B) phase.

Polineni S, Figueirinhas JL, Cruz C, Wilson DA, Mehl GH.

J Chem Phys. 2013 Mar 28;138(12):124904. doi: 10.1063/1.4795582.

PMID:
23556748
42.

A self-organized anisotropic liquid-crystal plasmonic metamaterial.

Dintinger J, Tang BJ, Zeng X, Liu F, Kienzler T, Mehl GH, Ungar G, Rockstuhl C, Scharf T.

Adv Mater. 2013 Apr 11;25(14):1999-2004. doi: 10.1002/adma.201203965. Epub 2013 Feb 7.

PMID:
23401232
43.

H_pe for mHealth: more "y" or "o" on the horizon?

Labrique A, Vasudevan L, Chang LW, Mehl G.

Int J Med Inform. 2013 May;82(5):467-9. doi: 10.1016/j.ijmedinf.2012.11.016. Epub 2012 Dec 29.

44.

Pregnancy registration systems can enhance health systems, increase accountability and reduce mortality.

Labrique AB, Pereira S, Christian P, Murthy N, Bartlett L, Mehl G.

Reprod Health Matters. 2012 Jun;20(39):113-7. doi: 10.1016/S0968-8080(12)39631-6.

45.

Chiral nematic organo-siloxane oligopodes based on an axially chiral binaphthalene core.

Schubert CP, Tamba MG, Mehl GH.

Chem Commun (Camb). 2012 Jul 11;48(54):6851-3. doi: 10.1039/c2cc33050d. Epub 2012 Jun 1.

PMID:
22659686
46.

Light-induced changes of the refractive indices in a colloid of gold nanoparticles in a nematic liquid crystal.

Lysenko D, Ouskova E, Ksondzyk S, Reshetnyak V, Cseh L, Mehl GH, Reznikov Y.

Eur Phys J E Soft Matter. 2012 May;35(5):33. doi: 10.1140/epje/i2012-12033-x. Epub 2012 May 17.

PMID:
22592815
47.

Biaxial order and a rotation of the minor director in the nematic phase of an organo-siloxane tetrapode by the electric field.

Merkel K, Nagaraj M, Kocot A, Kohlmeier A, Mehl GH, Vij JK.

J Chem Phys. 2012 Mar 7;136(9):094513. doi: 10.1063/1.3690108.

PMID:
22401458
48.

Design, synthesis, and characterization of mesogenic amine-capped nematic gold nanoparticles with surface-enhanced plasmonic resonances.

Yu CH, Schubert CP, Welch C, Tang BJ, Tamba MG, Mehl GH.

J Am Chem Soc. 2012 Mar 21;134(11):5076-9. doi: 10.1021/ja300492d. Epub 2012 Mar 7.

PMID:
22390286
49.

Nematic-nematic phase transition in the liquid crystal dimer CBC9CB and its mixtures with 5CB: a high-resolution adiabatic scanning calorimetric study.

Tripathi CS, Losada-Pérez P, Glorieux C, Kohlmeier A, Tamba MG, Mehl GH, Leys J.

Phys Rev E Stat Nonlin Soft Matter Phys. 2011 Oct;84(4 Pt 1):041707. Epub 2011 Oct 28.

PMID:
22181157
50.

Mesogenic BODIPYs: an investigation of the correlation between liquid crystalline behaviour and fluorescence intensity.

Benstead M, Rosser GA, Beeby A, Mehl GH, Boyle RW.

Photochem Photobiol Sci. 2011 Jun;10(6):992-9. doi: 10.1039/c0pp00388c. Epub 2011 Mar 7.

PMID:
21380443

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