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MRS Advances © 2020 Materials Research Society DOI: 10.1557/adv.2020.141

ƒ–‡…Š‘Ž†Ǧ —…–‹‘ƒŽ‹œ‡†‘Ž›•ƒ”…‘•‹‡ˆ‘” Ǧ •‹–—›–Š‡•‹•ƒ†–ƒ„‹Ž‹œƒ–‹‘‘ˆ‹Ž˜‡” ƒ‘’ƒ”–‹…Ž‡• ƒ‹Ž‡ƒ”‹ƒ ‡„”—ǡͳǡʹǡȗŠ‡Œ‹ƒ‰‹ͳ 1State Key Laboratory of Materials-Oriented Chemical Engineering, College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, 30 Puzhu Rd South, Nanjing 211816, China 2Technology

and Innovation Institute of Ethiopia, PO Box 2884, Addis Ababa, Ethiopia

*Corresponding author. [email protected]

ABSTRACT

Functional polymers were previously employed to minimize the susceptibility of metallic nanoparticles (MNPs) for aggregation. Herein, we intended to conjugate catechol moiety into the polymer chain end considering its anchoring ability to virtually most surfaces. Accordingly, catechol end-functionalized polysarcosine (cat-PSar) was successfully prepared from the ring-opening polymerization (ROP) of sarcosine N-carboxyanhydrides (Sar-NCA) using dopamine hydrochloride initiator. ROP of Sar-NCA was carried out at different monomer to initiator feed ratios. The molecular structure of cat-PSar was confirmed by 1H NMR and MALDITOF. Afterward, the obtained catechol functionalized polymer was used for in-situ synthesis and stabilization of silver nanoparticles (Ag-NPs) in aqueous solution. The observed characteristic absorption peak at λmax of 415 nm indicates the formation of Ag-NPs. Scanning electron microscope (SEM) images also elucidate the formation of Ag-NPs with the relatively small sizes of the nanocomposite at a high concentration of silver nitrate. Hence, biomimetic polymers could play a dual role as reducing and stabilizing agents in the preparation of monodispersed MNPs.

INTRODUCTION —…–‹‘ƒŽ‹œ‡†’‘Ž›’‡’–‘‹†•’‘••‡••‡†–”‡‡†‘—•ƒ––‡–‹‘‹–Š‡ˆ‹‡Ž†• ‘ˆ „‹‘‡†‹…ƒŽ ȏͳǦ͵Ȑ ƒ† ƒ‘•…‹‡…‡ ȏͶȐ ‘™‹‰ –‘ –Š‡‹” –—‡ƒ„Ž‡ ’Š›•‹…‘…Š‡‹…ƒŽ ’”‘’‡”–‹‡• ƒ† •‡“—‡…‡ •’‡…‹ˆ‹…‹–› ȏͷǡ͸ȐǤ ‘Ž›’‡’–‘‹†•ǡ ‘” ’‘Ž›ȋǦƒŽ›Ž ‰Ž›…‹‡Ȍ•ǡ 1113

Downloaded from https://www.cambridge.org/core. Rice University, on 16 May 2020 at 07:49:36, subject to the Cambridge Core terms of use, available at https://www.cambridge.org/core/terms. https://doi.org/10.1557/adv.2020.141

ƒ”‡ƒ˜‡”•ƒ–‹Ž‡…Žƒ••‘ˆ„‹‘ƒ–‡”‹ƒŽ•ƒƒŽ‘‰‘—•–‘ƒ–—”ƒŽ’‘Ž›’‡’–‹†‡•ȏ͹ǡͺȐ™‹–Š–Š‡ •—„•–‹–—–‹‘ ‘ˆ ƒ‹†‡ ‹–”‘‰‡ǡ Žƒ… •–‡”‡‘‰‡‹… …‡–‡” ƒ† ‡š–‡•‹˜‡ Š›†”‘‰‡ „‘†‹‰ ȏͻǡͳͲȐǤ Ž‹‡ ’‡’–‹†‡•ǡ ’‘Ž›’‡’–‘‹†• •Š‘™‡† •–”—…–—”ƒŽ ˜‡”•ƒ–‹Ž‹–› †—‡–‘ ƒ‹†‡ „ƒ…„‘‡ •—„•–‹–—‡–• –Šƒ– …ƒ „‡ ƒ„”—’–Ž› –—‡†Ǥ – ‹˜‘Ž˜‡• —Ž–‹Ǧ•–‡’ ‘‘‡” •›–Š‡•‹• ƒ† †‹ˆˆ‹…—Ž–› –‘ …‘–”‘Ž –Š‡ ‘Ž‡…—Žƒ” ™‡‹‰Š– †‹•–”‹„—–‹‘• ȏͳͳǡͳʹȐǤ‹‰Ǧ‘’‡‹‰’‘Ž›‡”‹œƒ–‹‘ȋȌ‘ˆ NǦ•—„•–‹–—–‡†NǦ…ƒ”„‘š›ƒŠ›†”‹†‡• ȋȌ ‘‘‡”• —•‹‰ ’”‹ƒ”› ƒ‹‡ ‹‹–‹ƒ–‘”• ‹• –Š‡ ‘•– ™‹†‡Ž› —•‡† –‡…Š‹“—‡–‘’”‡’ƒ”‡™‡ŽŽǦ†‡ˆ‹‡†’‘Ž›’‡’–‘‹†•ȏͳ͵ȐǤ ”‹ƒ”› ƒ‹‡ ‹‹–‹ƒ–‘”• ƒ† ƒ‹‡Ǧ–‡”‹ƒ–‡† ƒ…”‘Ǧ‹‹–‹ƒ–‘”• ™‡”‡ ‡’Ž‘›‡†ƒ•ƒ—…Ž‡‘’Š‹Ž‡ˆ‘”•‘ˆ•ȏͳͶǦͳ͸ȐǤ‡••‡”•‹–Š‡–ƒŽ•—‰‰‡•

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