High-Performance, Robust Metal Nanotrough-Embedded Transparent Conducting Film for Wearable Touch Screen Panel Application

Transcription

1 Electronic Supplementry Mteril (ESI) for Nnoscle. This journl is The Royl Society of Chemistry 216 Supporting Informtion High-Performnce, Roust Metl Nnotrough-Emedded Trnsprent Conducting Film for Werle Touch Screen Pnel Appliction Hyeon-Gyun Im, Byeong-Wn Ahn, Jungho Jin, c Junho Jng, Young-Geun Prk, Jng-Ung Prk * nd Byeong-Soo Be * Deprtment of Mterils Science & Engineering (MSE), Kore Advnced Institute of Science & Technology (KAIST), KOREA School of Mterils Science & Engineering (MSE), Ulsn Ntionl Institute of Science & Technology (UNIST), KOREA c School of Mterils Science & Engineering (MSE), University of Ulsn, KOREA Friction of the metl nnotrough networks on glss for susequent trnsfer process Figure S1. () Friction procedure of the metl nnotrough networks on glss. (, c) SEM imges for electrospun polymer templtes; () s-spun nd (c) nneled (The insets represent mgnified imges). The scle rs re 1 μm (The inset scle rs re 2 μm). A wter-solule polymer (PVP) ws electro-spun on n Al frme; dimeter of PVP templte is c. 1 μm. The use of conductive Al frme llows tht genertion of electric field etween nozzle nd Al frme, so one could form rndom/ligned free-stnding PVP network. Mximum size of the Al frme used in this work is 4 in. As mentioned in Experimentl Section, electro-spun polymer templte ws nneled t 15 o C for 1 h to promote welding of individul fiers. Note tht the junctions of polymer fiers were welded s reveled in Figure S1c.

2 SEM nlysis of the metl nnotrough network on glss Figure S2. SEM imges for metl nnotrough on glss. () Top nd () cross-sectionl view. The scle rs re 5 nd 1 μm, respectively. The metl nnotrough network is continuous. The dimeter of the metl nnotrough is c. 1 μm. 1 1 Trnsmittnce (T tot, %) /sq 2 4 /sq 2 /sq 1 /sq Wvelength (nm) Opticl trnsmittnce spectr of the metl nnotrough-gfrhyrimer films Figure S3. Totl trnsmittnce spectr of the metl nnotrough-gfrhyrimer films with vrying R sh vlues. () Bse-line with re GFRHyrimer film, nd () mient ir. Trnsmittnce (T tot, %) Bre GFRHyrimer film 35 /sq 4 /sq 2 /sq 1 /sq Wvelength (nm)

3 Opto-electricl performnce of the metl nnotrough-gfrhyrimer films ccording to the electrospinning time Figure S4. Sheet resistnce () nd trnsmittnce () of metl nnotrough-gfrhyrimer films s function of spinning time. Note tht the surfce coverge of the metl nnotrough network cn e controlled y electro-spinning time of polymer templte. A longer electro-spinning time results in denser metl nnotrough network. As incresing electro-spinning time, the metl nnotrough-gfrhyrimer films exhiit etter electricl uniformity. Therml stility of the metl nnotrough-gfrhyrimer film with elevting temperture Figure S5. Normlized R sh vlues of the metl nnotrough-gfrhyrimer film with elevting temperture (rmp rte = 5 o C min -1 ). R sh ws mintined up to 44 o C nd then incresed rpidly.

4 3 ITO/PET Sheet resistnce ( /sq) 2 1 Mechnicl stility of the reference ITO/PET Bending cycles Figure S6. Bending test result of commercil ITO/PET smple. Bending rdius is 1 mm. Sheet resistnce ( /sq) Metl nnotrough-gfrhyrimer film Tping cycles c Adhesion stility of the metl nnotrough-gfrhyrimer film Figure S7. () 3M tpe test result of the metl nnotrough-gfrhyrimer film. Test imges of () the metl

5 nnotrough on glss, nd (c) the metl nnotrough-gfrhyrimer film. Note tht the metl nnotrough on glss smple shows delmintion of TCE network fter tping. Touch screen pnel device Figure S8. Fricted touch screen pnel on ck of humn hnd. Figure S9. Photogrphs for the opertion of the TSP device integrted on the wristnd. Written chrcters re UNIST.