Name: quantitative sers detection of uric acid via formation of precise plasmonic nanojunctions within aggregates of gold nanoparticles and cucurbit[n]uril
Uploaded: 2020-10-03T13:00:00
Description: Watch this Scientific Journal Video about Quantitative SERS Detection of Uric Acid via Formation of Precise Plasmonic Nanojunctions within Aggregates of Gold Nanoparticles and Cucurbit[n]uril at JoVE.

TCL은 Royal Society Research Grant 2016 R1 (RG150551)과 EPSRC (EP / P511262 / 1)의 기관 후원 상을 통해 자금을 지원 한 UCL BEAMS Future Leader Award의 지원에 감사드립니다. WIKC, TCL 및 IPP는 EPSRC M3S CDT (EP / L015862 / 1)를 통해 A * STAR-UCL 연구 첨부 프로그램이 자금을 지원하는 학생회에 감사드립니다. GD와 TJ는 학생들을 후원해 주신 EPSRC M3S CDT (EP/L015862/1)에 감사드립니다. TJ와 TCL은 TJ의 학생들에 기여한 Camtech Innovations를 인정합니다. 모든 저자는 UCL Open Access Fund에 감사드립니다.

1. Au NPs의 합성
<ol><li>종래의 투르케비치 방법을 통한 Au 종자의 합성26<ol>
<li>98.5 mg의 HAuCl4· 3H2O전구체와 유리 바이알에 탈이온수 10 mL. 참고: 소량의 HAuCl4 전구체를 계량 보트로 옮기고 HAuCl4 전구체가 금속 실험실을 부식시키기 때문에 금속 주걱 대신 플라스틱 주걱을 사용하여 결정을 계량합니다. HAuCl4는 흡습성이므로 가능한 한 신속...

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프로토콜에 설명된 자동화된 합성 방법을 통해 크기가 증가하는 Au NP를 재현 가능하게 합성할 수 있습니다. 종자 합성 중에 구연산 나트륨을 빠르게 첨가하고 PEEK 튜브가 안전한지 확인하기 위해 주기적으로 검사하는 것과 같이 수동으로 수행해야하는 몇 가지 요소가 있지만,이 방법을 사용하면 일반적으로 HAuCl4 및 구연산 나트륨을 여러 번 수동으로 주입해야하는 큰 크기 (최대40nm )의 Au ...

퓨린 뉴클레오티드의 신진 대사의 최종 산물 인 요산은 통풍, 자간전증, 신장 질환, 고혈압, 심혈관 질환 및 당뇨병 1,2,3,4,5와 같은 질병의 진단을위한 혈액 혈청 및 소변의 중요한 바이오 마커입니다. 요산 검출을위한 현재의 방법에는 비색 효소 분석, 고성능 액체 크로마토그래피 및 모세관 전기 영동이 포함되며, 이는 시간이 많이 걸리고 비용이 많이 들며 정교한 샘플 준비 6,7,8,9가 필요합니다.
표면 강화 라만 분광법은 진동 지문을 통해 생체 분자를 선택적으로 검출 할 수 있고 고감도, 신속한 반응, 사용 편의성 및 시료 준비 없음 또는 최소와 같은 수많은 이점을 제공하므로 일상적인 진료 시점 진단을위한 유망한 기술입니다. 귀금속 나노입자(예를 들어, Au NPs)에 기초한 SERS 기판은 표면 플라즈몬 공명(11)에 의해 야기된 강한 전자기 향상을 통해 분석물 분자의 라만 신호를 크기10의 4 내지10 차수만큼 향상시킬 수 있다. 맞춤형 크기의 Au NP는 복잡한 금속 나노복합체(12)의 제조에 시간이 많이 걸리는 것과는 달리 쉽게 합성될 수 있으며, 따라서 이들의 우수한 특성(13,14,15,16)으로 인해 생물 의학 응용에 널리 사용된다. Au NPs의 표면 상에 거대고리 분자인 cucurbit[n]urils(CBn, 여기서 n=5-8, 10)의 부착은 고도로 대칭적이고 단단한 CB 분자가 Au NP 사이의 정확한 간격을 제어하고 숙주-게스트 복합체의 형성을 통해 플라즈몬 핫스팟에 중심 또는 근접하게 분석물 분자를 국부화할 수 있기 때문에 분석물 분자의 SERS 신호를 더욱 강화할 수 있다(도 1)17, 18,19,20. Au NP를 사용한 SERS 연구의 이전 예: CBn 나노응집체에는 니트로폭발물, 다환식 방향족제, 디아미노스틸벤, 신경전달물질 및 크레아티닌 21,22,23,24,25 가 포함되며, SERS 측정은 큐벳에서 수행되거나 맞춤형 샘플 홀더에 작은 물방울을 적재하여 수행됩니다. 이러한 검출 스킴은 높은 재현성을 갖는 복잡한 매트릭스에서 바이오마커를 신속하게 정량화하는데 특히 유용하다.
본원에서, CB7 및 중요한 바이오마커 UA의 숙주-게스트 복합체를 형성하고, 수성 매질에서 Au NPs의 CB7 매개된 응집을 통해 0.2 μM의 검출 한계로 UA를 정량화하는 용이한 방법이 모듈형 분광계를 사용하여 입증되었으며, 이는 진단 및 임상 적용에 유망하다.

<table>
	<tbody>
		<tr>
			<td>40 nm gold nanoparticles</td>
			<td>NanoComposix</td>
			<td>AUCN40-100M</td>
			<td>NanoXact, 0.05 mg/ mL, bare (citrate)</td>
		</tr>
		<tr>
			<td>Centrifuge tube</td>
			<td>Corning Falcon</td>
			<td>14-432-22</td>
			<td>50 mL volume</td>
		</tr>
		<tr>
			<td>Cucurbit[7]uril</td>
			<td>Lab-made</td>
			<td></td>
			<td>see ref. 19</td>
		</tr>
		<tr>
			<td>Gold(III) chloride trihydrate</td>
			<td>Sigma aldrich</td>
			<td>520918</td>
			<td>&#8805;99.9% trace metals basis</td>
		</tr>
		<tr>
			<td>Luer lock disposable syringe</td>
			<td>Cole-Parmer</td>
			<td>WZ-07945-15</td>
			<td>3 mL volume</td>
		</tr>
		<tr>
			<td>Luer-to-MicroTight adapter</td>
			<td>LuerTight</td>
			<td>P-662</td>
			<td>360 &#956;m outer diameter Tubing to Luer Syringe</td>
		</tr>
		<tr>
			<td>PEEK tubing</td>
			<td>IDEX</td>
			<td>1572</td>
			<td>360 &#956;m outer diameter, 150 &#956;m inner diameter</td>
		</tr>
		<tr>
			<td>PEEK tubing cutter</td>
			<td>IDEX</td>
			<td>WZ-02013-30</td>
			<td>Capillary Polymer Chromatography Tubing Cutter For 360 &#181;m to 1/32&#34; OD tubing</td>
		</tr>
		<tr>
			<td>Raman spectrometer</td>
			<td>Ocean Optics</td>
			<td>QE pro</td>
			<td></td>
		</tr>
		<tr>
			<td>Sodium citrate tribasic dihydrate</td>
			<td>Sigma aldrich</td>
			<td>S4641</td>
			<td>ACS reagent, &#8805;99.0%</td>
		</tr>
		<tr>
			<td>Sonicator</td>
			<td></td>
			<td></td>
			<td></td>
		</tr>
		<tr>
			<td>Standard Probe</td>
			<td>Digi-Sense</td>
			<td>WZ-08516-55</td>
			<td>Type-K</td>
		</tr>
		<tr>
			<td>Syringe pump</td>
			<td>Aladdin</td>
			<td>ALADDIN2-220</td>
			<td>2 syringes, maximum syringe volume 60 mL</td>
		</tr>
		<tr>
			<td>Thermocouple thermometer</td>
			<td>Digi-Sense</td>
			<td>WZ-20250-91</td>
			<td>Single-Input Thermocouple Thermometer with NIST-Traceable Calibration</td>
		</tr>
		<tr>
			<td>ThermoMixer</td>
			<td>Eppendorf</td>
			<td>5382000031</td>
			<td>With an Eppendorf SmartBlock for 50 mL tubes</td>
		</tr>
		<tr>
			<td>Uric acid</td>
			<td>Sigma aldrich</td>
			<td>U2625</td>
			<td>&#8805;99%, crystalline</td>
		</tr>
	</tbody>
</table>

quantitative sers detection of uric acid via formation of precise plasmonic nanojunctions within aggregates of gold nanoparticles and cucurbit[n]uril

이 연구는 모듈형 분광계를 사용하여 지문 영역의 여러 특성 피크에 대해 ~0.2μM의 낮은 검출 한계로 표면 강화 라만 분광법(SERS)을 통해 중요한 바이오마커인 요산(UA)의 정량적 검출을 위한 신속하고 매우 민감한 방법을 설명합니다. 이러한 바이오센싱 기법은 매크로사이클, cucurbit[7]uril (CB7) 및 UA 사이의 숙주-게스트 복합체화에 의해 매개되고, 이후 자체 조립된 Au NP:CB7 나노응집체 내에서 정확한 플라즈몬 나노접합의 형성에 의해 매개된다. SERS 기질에 대해 바람직한 크기의 용이한 Au NP 합성은 또한 실험실에서 제작한 자동 합성기를 사용하여 촉진될 수 있는 옵션을 갖는 고전적인 시트레이트 환원 접근법에 기초하여 수행되었다. 이 프로토콜은 임상 적용을 위해 체액에서 바이오마커의 다중화 검출로 쉽게 확장될 수 있다.

제시된 Au NP 합성에서 UV-Vis 스펙트럼은 10 성장 단계 (그림 4 A, B) 후에 LSPR 피크의 521 nm에서 529 nm로 이동을 보여 주며 DLS 데이터는 Au NP의 크기가 25.9 nm에서 42.8 nm로 증가함에 따라 좁은 크기 분포를 보여줍니다 (그림 4C, D). TEM 이미지에서 측정된 G0, G5 및 G10의 평균 크기(그림 4E)는 각각 20.1nm, 2.1nm± 32.5nm, 40.0...

Watch this Scientific Journal Video about Quantitative SERS Detection of Uric Acid via Formation of Precise Plasmonic Nanojunctions within Aggregates of Gold Nanoparticles and Cucurbit[n]uril at JoVE.

Quantitative SERS Detection of Uric Acid via Formation of Precise Plasmonic Nanojunctions within Aggregates of Gold Nanoparticles and Cucurbit[n]uril

큐커빗[7]우릴 및 요산의 호스트-게스트 복합체를 Au NP 용액에 소량 첨가하기 전에 수용액에서 형성하여 모듈형 분광계를 이용한 정량적 표면 강화 라만 분광법(SERS) 감지를 수행하였다.

금 나노 입자와 Cucurbit[n]uril의 응집체 내에서 정확한 플라즈몬 나노 접합의 형성을 통한 요산의 정량적 SERS 검출

This work describes a rapid and highly sensitive method for the quantitative detection of an important biomarker, uric acid (UA), via surface-enhanced ...

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JoVE Journal

Chemistry

Quantitative SERS Detection of Uric Acid via Formation of Precise Plasmonic Nanojunctions within Aggregates of Gold Nanoparticles and Cucurbit[n]uril

Template Directed Synthesis of Plasmonic Gold Nanotubes with Tunable IR Absorbance

템플릿 조정할 IR의 흡광도와 Plasmonic 골드 나노 튜브의 합성을 감독

A nearly parallel array of pores can be produced by anodizing aluminum foils in acidic environments1, 2. Applications of anodic aluminum oxide (AAO) ...

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Preparation of Silica Nanoparticles Through Microwave-assisted Acid-catalysis

전자 레인지를 이용한 산 - 촉매 반응을 통해 실리카 나노 입자의 제조

Microwave-assisted synthetic techniques were used to quickly and reproducibly produce silica nanoparticle sols using an acid catalyst with nanoparticle ...

A Simple Method for the Size Controlled Synthesis of Stable Oligomeric Clusters of Gold Nanoparticles under Ambient Conditions

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Reducing dilute aqueous HAuCl4 with sodium thiocyanate (NaSCN) under alkaline conditions produces 2 to 3 nm diameter nanoparticles. Stable grape-like ...

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Aliphatic ligands are typically used during the synthesis of nanoparticles to help mediate their growth in addition to operating as high-temperature ...

Hydroquinone Based Synthesis of Gold Nanorods

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Gold nanorods are an important kind of nanoparticles characterized by peculiar plasmonic properties. Despite their widespread use in nanotechnology, the ...

An Optimized Protocol for the Efficient Radiolabeling of Gold Nanoparticles by Using a 125I-labeled Azide Prosthetic Group

An Optimized Protocol for the Efficient Radiolabeling of Gold Nanoparticles by Using a 125I-labeled Azide Prosthetic Group

를 사용하여 금 나노 입자의 효율적인 방사성 표지를위한 최적화 된 프로토콜<sup&gt; (125)</sup&gt; I-표시 아 지드 보철 그룹

Here, we demonstrate a detailed protocol for the radiosynthesis of a 125I-labeled azide prosthetic group and its application to the efficient ...

Luminophore Formation in Various Conformations of Bovine Serum Albumin by Binding of Gold(III)

Luminophore Formation in Various Conformations of Bovine Serum Albumin by Binding of GoldIII

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The purpose of the presented protocols is to study the process of Au(III) binding to BSA, yielding conformation change-induced red fluorescence (&#955;em ...

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Gold nanoparticles covered with a mixture of 1-octanethiol (OT) and 11-mercapto-1-undecane sulfonic acid (MUS) have been extensively studied because of ...